Abdelazeem Saad Eltaweil

Abdelazeem Saad Eltaweil

Alexandria University

H-index: 40

Africa-Egypt

Abdelazeem Saad Eltaweil Information

University

Alexandria University

Position

Chemistry Department Faculty of Science Egypt

Citations(all)

3448

Citations(since 2020)

3447

Cited By

148

hIndex(all)

40

hIndex(since 2020)

40

i10Index(all)

54

i10Index(since 2020)

54

Email

University Profile Page

Alexandria University

Abdelazeem Saad Eltaweil Skills & Research Interests

Catalysis

Water treatment

Environmental eng.

Chemical Engg.

Green synthesis

Top articles of Abdelazeem Saad Eltaweil

Rational engineering and fabrication of efficient nanophotocatalysts based on ZnO-SrO-CdS for pharmaceutical pollutants based wastewater degradation

Cleaner production processes in conjunction with sustainability is the main requirement for clean and cost-effective industrial process. Moreover, the rapid growth of the world population in conjunction with limited sources of drinking water anticipated water crisis in many countries. Herein, indirect Z-scheme ZnO-3%SrO-2CdS photocatalyst was fabricated for the first time via thermal treatment and well identified by XRD, FT-IR, SEM, EDX and, XPS, meanwhile, the optical properties were evaluated using DRS, PL, and EPR analyses. The photocatalytic activity of noble metal free ZnO-3%SrO-2CdS was investigated in the photodegradation of six antibiotics, namely tetracycline, doxycycline, ofloxacin, amoxicillin, cephalexin, and sulfamethoxazole. Furthermore, kinetic study, pH, initial concentration, dosage, mass ratio, photoreactor type and different water source parameters have been investigated. Results …

Authors

Sarah Omar,Mirna Omar,Nour F Attia,Gehan M El-Subruiti,Abdelazeem Eltaweil

Journal

Surfaces and Interfaces

Published Date

2024/2/1

Enhanced Redox Cycle of Rod-Shaped MIL-88A/SnFe 2 O 4@ MXene Sheets for Fenton-like Degradation of Congo Red: Optimization and Mechanism.

This study intended to fabricate a novel Fenton-like catalyst by supporting the rod-like MIL-88A and the magnetic tin ferrite nanoparticles (SnFe2 O4) on the MXene sheets (MIL-88A/SnFe2 O4@ MXene). The well fabrication and determination of the MIL-88A/SnFe2 O4@ MXene properties were investigated using SEM, XPS, VSM, Zeta potential, XRD, and FTIR tools. The Fenton-like degradation reaction of CR by MIL-88A/SnFe2 O4@ MXene was thoroughly studied to identify the optimal proportions of the catalyst components, the impact of CR and H2 O2 concentrations, as well as the effect of raising the temperature and the pH medium of the catalytic system and the catalyst dosage. Kinetics studies were executed to analyze the decomposition of CR and H2 O2 using First-order and Second-order models. Furthermore, the degradation mechanism was proposed based on the scavenging test that proceeded in the …

Authors

Abd El-Monaem,M Eman,Nouf Al Harby,Mervette El Batouti,Abdelazeem S Eltaweil

Journal

Nanomaterials (2079-4991)

Published Date

2024/1/1

Synergistic effect between adsorption and Fenton-like degradation on CoNiFe-LDH/ZIF-8 composite for efficient degradation of doxycycline

This study aimed to remove doxycycline (DC) from wastewater via a synergistic effect between adsorption and Fenton-like degradation processes. For this purpose, cobalt–nickel-iron-layered double hydroxide/zeolitic imidazolate framework-8 (CoNiFe-LDH/ZIF-8) was designed to have a continuous redox cycle between the transition metals of CoNiFe-LDH. Furthermore, a high adsorption capacity is provided mainly by ZIF-8, which also endows electrons to the reduced metals of LDH via zinc-oxygen-metal (Zn-O-M) bonds. The morphology, chemical structure, surface charge, and crystallinity of CoNiFe-LDH/ZIF-8 were investigated. The adsorption percentage of DC onto CoNiFe-LDH/ZIF-8 was estimated to be 45.62 %, while the degradation percentage reached 98.5 % after 90 min. The removal mechanism was proposed based on the experimental results, Zeta Potential, and X-ray photoelectron spectroscopy (XPS …

Authors

Eman M Abd El-Monaem,Mohamed Hosny,Abdelazeem S Eltaweil

Journal

Chemical Engineering Science

Published Date

2024/4/5

The Toxicity of Mercury and Its Chemical Compounds: Molecular Mechanisms and Environmental and Human Health Implications: A Comprehensive Review

Mercury is a type of hazardous and toxic pollutant that can result in detrimental effects on the environment and human health. This review is aimed at discussing the state-of-the-art progress on the recent developments on the toxicity of mercury and its chemical compounds. More than 210 recent works of literature are covered in this review. It first delineates the types (covering elemental mercury, inorganic mercury compounds, organic mercury compounds), structures, and sources of mercury. It then discusses the pharmacokinetic profile of mercury, molecular mechanisms of mercury toxicity, and clinical manifestation of acute and chronic mercury toxicity to public health. It also elucidates the mercury toxicity to the environment and human health in detail, covering ecotoxicity, neurotoxicity diseases, neurological diseases, genotoxicity and gene regulation, immunogenicity, pregnancy and reproductive system damage …

Authors

Yuan-Seng Wu,Ahmed I Osman,Mohamed Hosny,Ahmed M Elgarahy,Abdelazeem S Eltaweil,David W Rooney,Zhonghao Chen,Nur Syafiqah Rahim,Mahendran Sekar,Subash CB Gopinath,Nur Najihah Izzati Mat Rani,Kalaivani Batumalaie,Pow-Seng Yap

Published Date

2024/1/22

Zero-valent iron supported-lemon derived biochar for ultra-fast adsorption of methylene blue

Green-based materials represent a new promising class of ecofriendly and economic adsorbents. Herein, nano zero-valent iron supported-lemon derived biochar (NZVI-LBC) was prepared for the first time and examined in the adsorptive removal of methylene blue as a model pollutant. Different characterization tools were used to ensure the successful fabrication of the NZVI-LBC composite including FTIR, XRD, TEM, XPS, VSM, BET, and zeta potential analysis. It was found that the fabricated NZVI–supported biochar composite attained the propitious adsorbent criteria since it provided a supreme efficient adsorption process at short  time. The reckoned maximum adsorption capacity of MB onto NZVI-LBC reached 1959.94 mg/g within merely 5 min. The obtained data clarified that the adsorption process of MB onto NZVI-LBC fitted pseudo 2nd order kinetic model and Freundlich isotherm model. Besides, the …

Authors

Eman M Abd El-Monaem,Ahmed M Omer,Gehan M El-Subruiti,Mohamed S Mohy-Eldin,Abdelazeem S Eltaweil

Journal

Biomass Conversion and Biorefinery

Published Date

2024/1

Advances in hydrogen storage materials: harnessing innovative technology, from machine learning to computational chemistry, for energy storage solutions

The demand for clean and sustainable energy solutions is escalating as the global population grows and economies develop. Fossil fuels, which currently dominate the energy sector, contribute to greenhouse gas emissions and environmental degradation. In response to these challenges, hydrogen storage technologies have emerged as a promising avenue for achieving energy sustainability. This review provides an overview of recent advancements in hydrogen storage materials and technologies, emphasizing the importance of efficient storage for maximizing hydrogen's potential. The review highlights physical storage methods such as compressed hydrogen (reaching pressures of up to 70 MPa) and material-based approaches utilizing metal hydrides and carbon-containing substances. It also explores design considerations, computational chemistry, high-throughput screening, and machine-learning …

Authors

Ahmed I Osman,Mahmoud Nasr,Abdelazeem S Eltaweil,Mohamed Hosny,Mohamed Farghali,Ahmed S Al-Fatesh,David W Rooney,Eman M Abd El-Monaem

Published Date

2024/3/27

2D/3D MXene/NiFeMn-layered double hydroxide decorated gelatin for removal of Cr (VI) and Congo red: Performance and mechanism

The discharge of toxic heavy metals and dyes into water is considered a principal reason for ecosystem deterioration. Therefore, the development of versatile adsorbents that can treat this threat is an urgent issue. On this basis, we designed and characterized a novel Ti3C2TX/NiFeMn-LDH@Gel composite to aptly remove hazardous hexavalent chromium ions Cr(VI) and organic Congo red dye (CR). Ti3C2TX/NiFeMn-LDH@Gel composite was facilely synthesized by introducing NiFeMn-layered double hydroxide and Ti3C2TX MXene into gelatin via a cross-linking reaction. Experimental data revealed that raising Ti3C2TX amount to 10 % in the matrix has dramatically promoted the adsorption aptitude of Ti3C2TX/NiFeMn-LDH@Gel towards Cr(VI) and CR. Freundlich model best described Cr(VI) and CR adsorption, with qmax reaching 423.73 mg/g, and 588.24 mg/g, respectively. Additionally, the adsorption kinetics …

Authors

Gehad S Elgarhy,Gehan M El-Subruiti,Ahmed M Omer,Abdelazeem S Eltaweil

Journal

Journal of Molecular Liquids

Published Date

2024/2/15

Synthesis of green nanoparticles for energy, biomedical, environmental, agricultural, and food applications: A review

Nanomaterials have been rapidly developed during the last decades, yet many nanoparticles synthesized by classical methods are toxic and their synthesis procedure is not sustainable. Here we review the green synthesis of nanoparticles from biomass and waste with a focus on synthetic mechanisms and applications in energy production and storage, medicine, environmental remediation, and agriculture and food. Biomass use for synthesis include microorganisms, fungi, plants, and agro-industrial bio-waste. Compared to conventional synthesis, green synthesis allows a 30% reduction in energy consumption, cost savings of up to 40%, and a 50% increase in production output. Biomedical applications comprise antibacterials, anticancers, antioxidants, and drug delivery mechanisms. Carbon quantum dots and photovoltaics are discussed in the energy section. Agricultural and food applications focus on …

Authors

Ahmed I Osman,Yubing Zhang,Mohamed Farghali,Ahmed K Rashwan,Abdelazeem S Eltaweil,Abd El-Monaem,M Eman,Israa Mohamed,Mai M Badr,Ikko Ihara,David W Rooney,Pow-Seng Yap

Published Date

2024/1/20

Microwave-assisted synthesis of Zn–Fe LDH modified with magnetic oxidized hydrochar for Pb (II) removal: Insights into stability, performance and mechanism

Among different materials for water treatment, layered double hydroxides could be considered as promising materials, but their water stability still needs investigation. Herein, a new adsorbent, magnetic oxidized hydrochar (MOHC) Zn–Fe layered double hydroxide (Zn–Fe LDH) composite (Zn–Fe LDH/MOHC) was prepared by the microwave-assisted synthesis. The adsorbent was demonstrated to remove lead ions Pb(II) from aqueous solution with super adsorption capacity and fast adsorption kinetics. The pristine Zn–Fe LDH was compared to Zn–Fe LDH/MOHC in terms of stability and adsorption capacity. Zn–Fe LDH/MOHC was found to be more stable and has much higher adsorption capacity (789.98 mg/g) than pristine Zn–Fe LDH (671.22 mg/g). Zn–Fe LDH/MOHC adsorption performance was also investigated in mixed solution and showed a slight decrease in the adsorption capacity in the presence of Ca2 …

Authors

Hala M Elshishini,Gehan M Elsubruiti,Zekry F Ghatass,Abdelazeem S Eltaweil

Journal

Journal of Solid State Chemistry

Published Date

2024/7/1

Nitrogen and sulfur-doped biochar supported magnetic CuZnFe2O4 as a sustainable adsorbent for efficient reactive black dye 5 removal from industrial wastewater

The shortage of clean and safe water resources, due to the growing pollution and the high cost of water treatment techniques, has become a real threat. Herein, CuZnFe 2 O 4@ N, S-doped biochar (CZF@ N, S-BC), a novel magnetic, cleaner, and completely green-based composite, was fabricated using the aqueous extract of Beta vulgaris (sugar beet) leaves for the efficient removal of reactive black dye 5 (RB5) from industrial wastewater discharge. With the aid of numerous techniques, including Fourier-Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Spectroscopy (SEM), Vibrating Sample Magnetometer (VSM), and zeta potential analyses, CZF@ N, S-BC was well-characterized. The results revealed the successful fabrication of CZF@ N, S-BC with good magnetic saturation of 12 emu/g and a highly positively charged surface of 32 mV at pH 2. The removal …

Authors

Ahmed M Abdelfatah,Manal Fawzy,Mohamed E El-Khouly,Abdelazeem S Eltaweil

Journal

Biomass Conversion and Biorefinery

Published Date

2024/2/14

Dandelion-like Cu-Ni LDH-decorated biochar/aminated chitosan composite for boosting Fenton-like degradation of doxycycline: Insights into performance and mechanism

This study fabricated a novel biochar/amine chitosan composite (BC/AmCS) decorated with dandelion-like Copper-Nickel layered double hydroxide (Cu-Ni LDH) for Fenton-like degradation of doxycycline (DOX). The Fenton-like degradation of DOX proceeded at varied experimental conditions, implying the superior degradation efficacy of Cu-Ni LDH/BC/AmCS composite at pH = 8, H2O2 = 400 mg/L, and composite dosage = 0.03 g/L. Interestingly, results showed that the Fenton-like degradation % of DOX reached 86.9 % after 1 h at a high concentration of DOX (500 mg/L). Furthermore, it was recorded a synergistic effect between adsorption, and Fenton-like processes during the degradation of DOX, where the adsorption % attained 46.9 %. Moreover, kinetic modeling clarified the fitting of a pseudo-first-order kinetic model to model the degradation of DOX by Cu-Ni LDH/BC/AmCS/H2O2 system. Based on the X-ray …

Authors

Abdelazeem S Eltaweil,Nourhan Mohamed Gaber,Gehan M El-Subruiti,Ahmed M Omer

Journal

Journal of Molecular Liquids

Published Date

2024/1/15

Sequestration of Pb (II) using channel-like porous spheres of carboxylated graphene oxide-incorporated cellulose acetate@ i minodiacetic acid: optimization and mechanism study

The adsorption property of the costless green cellulose acetate (CA) was boosted by the dual modifications: inner modification by incorporating carboxylated graphene oxide (COOH-GO) into the CA spheres and outer modification by the surface modification of the COOH-GO@CA spheres by iminodiacetic acid (IDA) for removing Pb(II). The adsorption experiments of the Pb(II) proceeded in a batch mode to evaluate the adsorption property of the COOH-GO@CA@IDA spheres. The maximal Pb(II) adsorption capacity attained 613.30 mg/g within 90 min at pH = 5. The removal of Pb(II) reached its equilibrium within 20 min, and the removal % was almost 100% after 30 min at the low Pb(II) concentration. The Pb(II) adsorption mechanism was proposed according to the kinetics and isotherms studies; in addition, the zeta potential (ZP) measurements and X-ray Photoelectron Spectroscopy (XPS) analysis defined the …

Authors

Eman M Abd El-Monaem,Hassanien Gomaa,Ahmed M Omer,Gehan M El-Subruiti,Abdelazeem S Eltaweil

Journal

Environmental Science and Pollution Research

Published Date

2024/4/25

Machine learning for membrane design in energy production, gas separation, and water treatment: a review

Membrane filtration is a major process used in the energy, gas separation, and water treatment sectors, yet the efficiency of current membranes is limited. Here, we review the use of machine learning to improve membrane efficiency, with emphasis on reverse osmosis, nanofiltration, pervaporation, removal of pollutants, pathogens and nutrients, gas separation of carbon dioxide, oxygen and hydrogen, fuel cells, biodiesel, and biogas purification. We found that the use of machine learning brings substantial improvements in performance and efficiency, leading to specialized membranes with remarkable potential for various applications. This integration offers versatile solutions crucial for addressing global challenges in sustainable development and advancing environmental goals. Membrane gas separation techniques improve carbon capture and purification of industrial gases, aiding in the reduction of carbon …

Authors

Ahmed I Osman,Mahmoud Nasr,Mohamed Farghali,Sara S Bakr,Abdelazeem S Eltaweil,Ahmed K Rashwan,Abd El-Monaem,M Eman

Published Date

2024/2/6

Novel sulfonamide derivatives as multitarget antidiabetic agents: design, synthesis, and biological evaluation

A series of new sulfonamide derivatives connected through an imine linker to five or seven membered heterocycles were designed and synthesized. All synthesized derivatives were characterized using a variety of spectroscopic methods, including IR, 1HNMR, and 13CNMR. In vitro α-glucosidase and α-amylase inhibition activities, as well as glucose uptake were assessed for each of the synthesized compounds. Four sulfonamide derivatives namely 3a, 3b, 3h and 6 showed excellent inhibitory potential against α-glucosidase with IC50 values of 19.39, 25.12, 25.57 and 22.02 μM, respectively. They were 1.05- to 1.39-fold more potent than acarbose. Sulfonamide derivatives 3g, 3i and 7 (EC50 values of 1.29, 21.38 and 19.03 μM, respectively) exhibited significant glucose uptake activity that were 1.62- to 27-fold more potent than berberine. Both α-glucosidase protein (PDB: 2QMJ) and α-amylase (PDB: 1XCW …

Authors

Mohammed Salah Ayoup,Nourhan Khaled,Hamida Abdel-Hamid,Doaa A Ghareeb,Samah A Nasr,Ahmed Omer,Amr Sonousi,Asmaa E Kassab,Abdelazeem S Eltaweil

Journal

RSC advances

Published Date

2024

Cellulose acetate nanofiber modified with polydopamine polymerized MOFs for efficient removal of noxious organic dyes

The need to effectively remove toxic organic dyes from aquatic systems has become an increasingly critical issue in the recent years. In pursuit of this objective, polydopamine (PDA)-binary ZIF-8/UiO-66 (MOFs) was synthesized and incorporated into cellulose acetate (CA), producing ZIF-8/UiO-66/PDA@CA composite nanofibers under meticulously optimized conditions. The potential of fabricated nanofibers to remove cationic methylene blue (MB) dye was investigated. Various analysis tools including FTIR, XRD, SEM, zeta potential, BET, tensile strength testing, and XPS were employed. Results revealed a substantial leap in tensile strength, with ZIF-8/UiO-66/PDA@CA registering an impressive 2.8 MPa, as a marked improvement over the neat CA nanofibers (1.1 MPa). ZIF-8/UiO-66/PDA@CA nanofibers exhibit an outstanding adsorption capacity of 82 mg/g, notably outperforming the 22.4 mg/g capacity of neat CA …

Authors

Esther Eze,Ahmed M Omer,Ahmed H Hassanin,Abdelazeem S Eltaweil,Mohamed E El-Khouly

Journal

Environmental Science and Pollution Research

Published Date

2024/4/10

Sandwich-like construction of a new aminated chitosan Schiff base for efficient removal of Congo red

Herein, a novel sandwich-like α-ketoglutaric acid Schiff base-aminated chitosan composite (α-kGl-AmCsSB) was fabricated by reacting α-ketoglutaric acid and aminated chitosan. The as-fabricated α-kGl-AmCsSB was inspected by diversified characterization tools to determine its morphology, surface charge, and chemical composition as well as define the linkage pathway between α-kGl and AmCs. The SEM images demonstrated a spongy network of AmCs with interconnected pores structure which turned to a quite rough surface due to the linkage of α-kGl to the free amine groups of AmCs. Notably, the XPS and FTIR spectra suggested the linkage of α-kGl to the amine group of AmCs. The experimental results implied the superior adsorption efficiency of Congo red (CR) onto α-kGl-AmCsSB since the maximum adsorption capacity (qmax) reached 434.78 mg/g at 25 °C and pH 3. Based on kinetics data, the …

Authors

Eman M Abd El-Monaem,Mohammed Salah Ayoup,Ahmed M Omer,Eman Nasr Hammad,Abdelazeem S Eltaweil

Journal

Applied Water Science

Published Date

2023/2

A comprehensive review on LDH-based catalysts to activate persulfates for the degradation of organic pollutants

Degradation of organic contaminants into less toxic substances is the best option to remove these compounds rather than using conventional techniques. The sulfate radical-based-advanced oxidation process is an effective strategy that degrades organic contaminants by activating peroxymonosulfate (PMS). Such a strategy generates singlet oxygen (1O2), hydroxyl (), and sulfate () radicals. is distinguished by its high oxidation selectivity and activity toward the degradation of organic contaminates compared to other radicals. Various catalysts are employed in PMS activation including layered doubled hydroxides (LDHs), which are characterized by their facile synthesis and high catalytic activity. This review article is the first attempt to compile the recent progress in the degradation of common organic pollutants including aromatic compounds, pharmaceutical residues, and dyes via the PMS activation …

Authors

Eman M Abd El-Monaem,Hala M Elshishini,Sara S Bakr,Hisham G El-Aqapa,Mohamed Hosny,Gangadhar Andaluri,Gehan M El-Subruiti,Ahmed M Omer,Abdelazeem S Eltaweil

Published Date

2023/4/25

Materials, fuels, upgrading, economy, and life cycle assessment of the pyrolysis of algal and lignocellulosic biomass: a review

Climate change issues are calling for advanced methods to produce materials and fuels in a carbon–neutral and circular way. For instance, biomass pyrolysis has been intensely investigated during the last years. Here we review the pyrolysis of algal and lignocellulosic biomass with focus on pyrolysis products and mechanisms, oil upgrading, combining pyrolysis and anaerobic digestion, economy, and life cycle assessment. Products include oil, gas, and biochar. Upgrading techniques comprise hot vapor filtration, solvent addition, emulsification, esterification and transesterification, hydrotreatment, steam reforming, and the use of supercritical fluids. We examined the economic viability in terms of profitability, internal rate of return, return on investment, carbon removal service, product pricing, and net present value. We also reviewed 20 recent studies of life cycle assessment. We found that the pyrolysis method …

Authors

Ahmed I Osman,Mohamed Farghali,Ikko Ihara,Ahmed M Elgarahy,Amir Ayyad,Neha Mehta,Kim Hoong Ng,Eman M Abd El-Monaem,Abdelazeem S Eltaweil,Mohamed Hosny,Seham M Hamed,Samer Fawzy,Pow-Seng Yap,David W Rooney

Published Date

2023/6

Recycling of Fruit By-Products for Wastewater Treatment Applications

The fruit by-products are considered as environmental waste as they are produced in huge quantities worldwide and are considered as environmental waste as they emit soil pollutant compounds. Therefore, converting them into useful products for industrial applications will have dual objectives in terms of environment and new economic value. Hence, recently, various fruit by-products, such as orange peel (OP), banana peel (BP), tamarind shell, and Indonesian snake fruit peel, have been utilized as a renewable precursor for porous carbon material synthesis for various applications. On the other hand, water pollution by various organic and inorganic metals is a serious environmental issue, which in turn threatens the life of human beings. This is in conjunction with the anticipated water crisis in most of the world regions; hence, wastewater treatment is a mandatory process to protect the environmental life on earth …

Authors

Nour F Attia,Eman M Abd El-Monaem,Sally EA Elashery,Abdelazeem S Eltaweil

Published Date

2023/6/21

Pinewood sawdust biochar as an effective biosorbent for PAHs removal from wastewater

Biochar is known to be an efficient bio-sorbent for a multitude of pollutants from wastewater due to its eco-friendly and economically advantages. In this study, three different biochar adsorbents were synthesized from pinewood sawdust by no activation, chemical and physical activation followed by pyrolysis process at 500 °C for 3 h. The morphologies and compositions of the three adsorbents were systemically measured by Brunauer–Emmett–Teller, Fourier-transform infrared spectroscopy, scanning electron microscope, and elemental analysis. The batch experiments were established, and HPLC analyzed the adsorption uptake of naphthalene, phenanthrene, and anthracene compounds on the surface of the three pinewood sawdust biochars (PWSDB) at different predefined times intervals. The studies elucidated that the pseudo-second-order kinetic model best-represented naphthalene (NAP), phenanthrene …

Authors

Emanne Rashad,Hadeer N Saleh,Abdelazeem S Eltaweil,Maher E Saleh,Mika Sillanpaa,Alaa R Mostafa

Journal

Biomass Conversion and Biorefinery

Published Date

2023/10

Synthesis and potential applications of cyclodextrin-based metal–organic frameworks: A review

Metal–organic frameworks are porous polymeric materials formed by linking metal ions with organic bridging ligands. Metal–organic frameworks are used as sensors, catalysts for organic transformations, biomass conversion, photovoltaics, electrochemical applications, gas storage and separation, and photocatalysis. Nonetheless, many actual metal–organic frameworks present limitations such as toxicity of preparation reagents and components, which make frameworks unusable for food and pharmaceutical applications. Here, we review the structure, synthesis and properties of cyclodextrin-based metal–organic frameworks that could be used in bioapplications. Synthetic methods include vapor diffusion, microwave-assisted, hydro/solvothermal, and ultrasound techniques. The vapor diffusion method can produce cyclodextrin-based metal–organic framework crystals with particle sizes ranging from 200 nm to 400 …

Authors

Yang Xu,Ahmed K Rashwan,Ahmed I Osman,Eman M Abd El-Monaem,Ahmed M Elgarahy,Abdelazeem S Eltaweil,Mirna Omar,Yuting Li,Abul-Hamd E Mehanni,Wei Chen,David W Rooney

Published Date

2023/2

Graphene oxide incorporated cellulose acetate beads for efficient removal of methylene blue dye; isotherms, kinetic, mechanism and co-existing ions studies

In this investigation, new porous adsorbent beads were formulated via the incorporation of graphene oxide (GO) into cellulose acetate beads (CA) for the adsorptive removal of methylene blue (MB) dye. The experimental results signified that the adsorption of MB dye increased with the increase in the GO ratio from 10 to 25%. In addition, the adsorption process obeyed PSO kinetic model and Langmuir isotherm model with a maximum adsorption capacity reaching 369.85 mg/g. More importantly, it was proposed that the adsorption mechanism of MB dye onto GO@CA proceeded via electrostatic interactions, H-bonding, van der Waals forces, n-π and π -π interactions. Besides, the fabricated beads exhibited an excellent ability to recycle and reuse after five successive cycles. In addition, there was a high selectivity of GO@CA beads towards MB molecules in the presence of co-existing cations such as Fe2+, Zn2+, Cu …

Authors

Abdelazeem S Eltaweil,Eman M Abd El-Monaem,Gehan M El-Subruiti,Bassma M Ali,Mona M Abd El-Latif,Ahmed M Omer

Journal

Journal of Porous Materials

Published Date

2023/4

Novel cytocompatible chitosan Schiff base derivative as a potent antibacterial, antidiabetic, and anticancer agent

This study intends to develop a novel bioactive chitosan Schiff base (CTS-SB) derivative via coupling of chitosan (CTS) with 4-((5, 5-dimethyl-3-oxocyclohex-1-en-1-yl) amino) benzene-sulfonamide. The alteration in the chemical structure of CTS-SB was verified using 1H NMR and FT-IR analysis, while the thermal and morphological properties were inspected by TGA and SEM characterization tools, respectively. Ion exchange capacity of the developed CTS-SB derivative recorded a maximal value of 12.1 meq/g compared to 10.1 meq/g for pristine CTS. In addition, antibacterial activity of CTS-SB derivative was greatly boosted against Escherichia coli (E coli) and Staphylococcus aureus (S. aureus) bacteria. Minimum inhibition concentration of CTS-SB derivative was perceived at 50 µg/mL, while the highest concentration (250 µg/mL) could inhibit the growth of S. aureus up to 91%. What’s more, enhanced …

Authors

Ahmed M Omer,Abdelazeem S Eltaweil,Esmail M El-Fakharany,Eman M Abd El-Monaem,Magda MF Ismail,Mohamed S Mohy-Eldin,Mohammed S Ayoup

Journal

Arabian Journal for Science and Engineering

Published Date

2023/6

Magnetic hierarchical flower-like Fe3O4@ZIF-67/CuNiMn-LDH catalyst with enhanced redox cycle for Fenton-like degradation of Congo red: optimization and …

A novel flower-like CuNiMn-LDH was synthesized and modified, to obtain a promising Fenton-like catalyst, Fe3O4@ZIF-67/CuNiMn-LDH, with a remarkable degradation of Congo red (CR) utilizing H2O2 oxidant. The structural and morphological characteristics of Fe3O4@ZIF-67/CuNiMn-LDH were analyzed via FTIR, XRD, XPS, SEM-EDX, and SEM spectroscopy. In addition, the magnetic property and the surface’s charge were defined via VSM and ZP analysis, respectively. Fenton-like experiments were implemented to investigate the aptness conditions for the Fenton-like degradation of CR; pH medium, catalyst dosage, H2O2 concentration, temperature, and the initial concentration of CR. The catalyst exhibited supreme degradation performance for CR to reach 90.9% within 30 min at pH 5 and 25 °C. Moreover, the Fe3O4@ZIF-67/CuNiMn-LDH/H2O2 system revealed considerable activity when tested for …

Authors

Abdelazeem S Eltaweil,Sara S Bakr,Eman M Abd El-Monaem,Gehan M El-Subruiti

Journal

Environmental Science and Pollution Research

Published Date

2023/6

Easy separable, floatable, and recyclable magnetic-biochar/alginate bead as super-adsorbent for adsorbing copper ions in water media

This work aimed to develop innovative material by combining properties of magnetic-biochar (derived from peanut shells) and hydrogel bead (MBA-bead) and apply it for adsorbing Cu2+ in water. MBA-bead was synthesized by physical cross-linking methods. Results indicated that MBA-bead contained ∼90% water. The diameter of each spherical MBA-bead was approximately 3 mm (wet form) and 2 mm in (dried form). Its specific surface area (262.4 m2/g) and total pore volume (0.751 cm3/g) were obtained from nitrogen adsorption at 77 K. X-ray diffraction data confirmed Fe3O4 presented in magnetic-biochar and MBA-bead. Its Langmuir maximum adsorption capacity for Cu2+ was 234.1 mg/g (30 °C and pHeq 5.0). The change in standard enthalpy (ΔH°) of the adsorption was 44.30 kJ/mol (dominant physical adsorption). Primary adsorption mechanisms were complexation, ion exchange, and Van der Waals force …

Authors

Dhirar Ben Salem,Abdelkader Ouakouak,Fouzia Touahra,Noureddine Hamdi,Abdelazeem S Eltaweil,Asad Syed,Ramaraj Boopathy,Hai Nguyen Tran

Journal

Bioresource Technology

Published Date

2023/9/1

Graphene oxide@ Fe3O4-decorated iota-carrageenan composite for ultra-fast and highly efficient adsorption of lead (II) from water

The aggravated problem of lead pollution, especially in aquatic environments, necessitates the development of eminent adsorbents that could radically solve this environmental problem. Hence, a new composite was constructed based on iota carrageenan (i.Carr), graphene oxide (GO) and magnetite (Fe3O4) for removing noxious Pb2+ ions. The GO@Fe3O4-i.Carr composite was characterized by VSM, SEM, XPS, XRD, FTIR and Zeta potential. The removal of Pb2+ ions attained a quick equilibrium of almost 30 min with a removal efficiency reaching 93.68 %. The removal of Pb2+ was boosted significantly, in the order of GO@Fe3O4-i.Carr(1:1) > GO@Fe3O4-i.Carr(1:3) > GO@Fe3O4-i.Carr(3:1). Moreover, acquired experimental data fitted the pseudo 2nd order kinetic model and Freundlich isotherm model with a maximal monolayer adsorption capacity reached 440.05 mg/g. Notably, after five adsorption runs, the …

Authors

Ahmed M Omer,Mohamed El-Sayed,Eman M Abd El-Monaem,Gehan M El-Subruiti,Abdelazeem S Eltaweil

Journal

International Journal of Biological Macromolecules

Published Date

2023/12/31

Phosphate removal by Lanthanum-doped aminated graphene oxide@ aminated chitosan microspheres: Insights into the adsorption mechanism

The proliferation of noxious anions particularly phosphate into water bodies depreciates the ecological system and adversely affects human health and the environment. The development of efficient, cleaner and sustainable adsorbents for removing phosphate has become crucial. Herein, new eco-friendly, cleaner and reusable Lanthanum-doped aminated graphene oxide/aminated chitosan microspheres (La-AmGO@AmCs) were fabricated for the efficient removal of phosphate anions. La-AmGO@AmCs microspheres were thoroughly characterized by FTIR, TGA, XRD, SEM, BET, XPS, and zeta potential analysis tools. La-AmGO@AmCs microspheres displayed a positively charged surface (64.4 mV), acceptable thermal stability, and high specific surface area (123.66 m2/g). A promising adsorption performance was attained by increasing the La ratio from 3 to 10% with a trivial increase in the adsorption capacity of …

Authors

Abdelazeem S Eltaweil,Karim Ibrahim,Eman M Abd El-Monaem,Gehan M El-Subruiti,Ahmed M Omer

Journal

Journal of Cleaner Production

Published Date

2023/1/20

Adsorption of nitrophenol onto a novel Fe3O4-κ-carrageenan/MIL-125(Ti) composite: process optimization, isotherms, kinetics, and mechanism

Water pollution is a dreadful affair that has incessantly aggravated, exposing our planet to danger. In particular, the persistent nitro aromatic compound like nitrophenols causes anxiety to the researchers due to their hazardous impacts, excessive usage, and removal difficulty. For this purpose, a novel multi-featured composite was constructed based on κ-Carrageenan (κ-Carr), MOF (MIL-125(Ti)), and magnetic Fe3O4 for efficient adsorptive removal of o-nitrophenol (o-NP). Interestingly, BET measurements revealed the high surface area of Fe3O4-κ-Carr/MIL-125(Ti) of about 163.27 m2/g, while VSM showed its excellent magnetic property (20.34 emu/g). The comparison study pointed out the synergistic effect between Fe3O4, κ-Carr, and MIL-125(Ti), forming a composite with an excellent adsorption performance toward o-NP. The adsorption data obeyed pseudo-second-order kinetic model, and Freundlich isotherm …

Authors

Eman M Abd El-Monaem,Abdelazeem S Eltaweil,Gehan M El-Subruiti,Mohamed S Mohy-Eldin,Ahmed M Omer

Journal

Environmental Science and Pollution Research

Published Date

2023/4

Construction of gastroretentive aminated chitosan coated (sunflower oil/alginate/i-carrageenan) floatable polymeric beads for prolonged release of Amoxicillin trihydrate

New gastroretentive floatable polymeric beads were developed for efficient encapsulation and prolonged release of amoxicillin trihydrate (AMT). Herein, sunflower oil (SFO) was entrapped into alginate (Alg)/iota carrageenan (i-CG) doubly networked polymeric beads, and followed by surface-coating with aminated chitosan (AmCs) layer. Diverse analysis tools were employed to investigate the chemical structure, thermal and morphological properties of the formulated AmCs@ (SFO/Alg/i-CG) polymeric beads. The formulated polymeric beads exhibited exceptional floating ability exceeded 24 h without floating lag time. Additionally, approximately 93.29% of AMT-drug was successfully encapsulated into the floatable coated polymeric beads. The AMT-drug burst release at pH.1.2 was meaningfully dwindled with increasing AmCs concentration up to 4%., while a prolonged release manner took place up to 25 h …

Authors

Basma H Naiel,Gehan M El-Subruiti,Randa E Khalifa,Abdelazeem S Eltaweil,Ahmed M Omer

Journal

Journal of Drug Delivery Science and Technology

Published Date

2023/6/1

Methods to prepare biosorbents and magnetic sorbents for water treatment: a review

Access to drinkable water is becoming more and more challenging due to worldwide pollution and the cost of water treatments. Water and wastewater treatment by adsorption on solid materials is usually cheap and effective in removing contaminants, yet classical adsorbents are not sustainable because they are derived from fossil fuels, and they can induce secondary pollution. Therefore, biological sorbents made of modern biomass are increasingly studied as promising alternatives. Indeed, such biosorbents utilize biological waste that would otherwise pollute water systems, and they promote the circular economy. Here we review biosorbents, magnetic sorbents, and other cost-effective sorbents with emphasis on preparation methods, adsorbents types, adsorption mechanisms, and regeneration of spent adsorbents. Biosorbents are prepared from a wide range of materials, including wood, bacteria, algae …

Authors

Ahmed I Osman,Eman M Abd El-Monaem,Ahmed M Elgarahy,Chukwunonso O Aniagor,Mohamed Hosny,Mohamed Farghali,Emanne Rashad,Marcel I Ejimofor,Eduardo A López-Maldonado,Ikko Ihara,Pow-Seng Yap,David W Rooney,Abdelazeem S Eltaweil

Published Date

2023/8

Enhanced Redox Cycle of Rod-Shaped MIL-88A/SnFe2O4@MXene Sheets for Fenton-like Degradation of Congo Red: Optimization and Mechanism

This study intended to fabricate a novel Fenton-like catalyst by supporting the rod-like MIL-88A and the magnetic tin ferrite nanoparticles (SnFe2O4) on the MXene sheets (MIL-88A/SnFe2O4@MXene). The well fabrication and determination of the MIL-88A/SnFe2O4@MXene properties were investigated using SEM, XPS, VSM, Zeta potential, XRD, and FTIR tools. The Fenton-like degradation reaction of CR by MIL-88A/SnFe2O4@MXene was thoroughly studied to identify the optimal proportions of the catalyst components, the impact of CR and H2O2 concentrations, as well as the effect of raising the temperature and the pH medium of the catalytic system and the catalyst dosage. Kinetics studies were executed to analyze the decomposition of CR and H2O2 using First-order and Second-order models. Furthermore, the degradation mechanism was proposed based on the scavenging test that proceeded in the presence of chloroform and t-butanol, in addition to the XPS analysis that clarified the participation of the containing metal species: Fe, Sn, and Ti, and the formation of a continual redox cycle. The obtained intermediates during the CR degradation were defined by GC–MS. A recyclability test was performed on MIL-88A/SnFe2O4@MXene during five runs of the Fenton-like degradation of CR molecules. Finally, the novel MIL-88A/SnFe2O4@MXene Fenton-like catalyst could be recommended as a propitious heterogeneous catalyst with a continuous redox cycle and a recyclability merit.

Authors

Eman M Abd El-Monaem,Nouf Al Harby,Mervette El Batouti,Abdelazeem S Eltaweil

Journal

Nanomaterials

Published Date

2023/12/24

Efficient removal of noxious methylene dye by low-cost and reusable composite beads based on cellulose acetate/banana pseudo-stem fiber

Converting agricultural waste into an effectual adsorbent material for removing organic pollutants without creating secondary pollution has received considerable attention. Herein, a green approach was employed to construct eco-friendly composite beads with ease-separation and reusability features for the adsorption of methylene blue (MB) dye. The treated banana pseudo-stem fibers (BFs) were functionalized using iminodiacetic acid (IDA) and impregnated into cellulose acetate beads. The developed IDA-BFs@CA composite beads were analyzed by FTIR, TGA, SEM, XRD, UV-Vis, photoluminescence, BET, XPS, and zeta potential characterization tools. The composite beads demonstrated a porous structure; negatively charged surface (−27.4 mV) and acceptable surface area reached 38.29 m2/g with a pore volume of 0.097 cm3/g. In addition, the removal (%) was greatly improved and reached a maximal …

Authors

Esther Eze,Ahmed M Omer,Ahmed H Hassanin,Abdelazeem S Eltaweil,Mohamed E El-Khouly

Journal

Biomass Conversion and Biorefinery

Published Date

2023/5/23

Effective production of bacterial cellulose using acidic dairy industry by-products and agro wastes

The study aimed to evaluate the production of bacterial cellulose (BC) by specialized bacteria using raw acidic dairy wastewater and milk whey as well as evaluating the bioremediation ability of the tested bacteria for the purification of polluted wastewater. Raw dairy wastewater samples were collected from Milk Factory in Alexandria Governorate, Egypt. Three bacterial isolates were isolated from spoiled Tomato (T0) and Pomegranate (R01 & R02), and investigated as free-living and fixed individual and mixed cultures in batch mode bioassays. BC was extracted, determined and characterized. T0, R01 & R02 were molecularly identified as Bacillus velezensis strain FZB42 (T0), Klebsiella quasipneumoniae subsp. similipneumoniae strain 07A044 (R01 and R02). T0 achieved the maximum BC yield of 31.9 g/L compared to 13.18 g/L produced by the standard synthetic Hestrin-Schramm (HS) medium. It also showed …

Authors

Ebtesam El-Bestawy,Abdelazeem S Eltaweil,Nardine S Khallaf

Journal

Sustainable Chemistry and Pharmacy

Published Date

2023/6/1

Microplastic sources, formation, toxicity and remediation: a review

Microplastic pollution is becoming a major issue for human health due to the recent discovery of microplastics in most ecosystems. Here, we review the sources, formation, occurrence, toxicity and remediation methods of microplastics. We distinguish ocean-based and land-based sources of microplastics. Microplastics have been found in biological samples such as faeces, sputum, saliva, blood and placenta. Cancer, intestinal, pulmonary, cardiovascular, infectious and inflammatory diseases are induced or mediated by microplastics. Microplastic exposure during pregnancy and maternal period is also discussed. Remediation methods include coagulation, membrane bioreactors, sand filtration, adsorption, photocatalytic degradation, electrocoagulation and magnetic separation. Control strategies comprise reducing plastic usage, behavioural change, and using biodegradable plastics. Global plastic production has …

Authors

Ahmed I Osman,Mohamed Hosny,Abdelazeem S Eltaweil,Sara Omar,Ahmed M Elgarahy,Mohamed Farghali,Pow-Seng Yap,Yuan-Seng Wu,Saraswathi Nagandran,Kalaivani Batumalaie,Subash CB Gopinath,Oliver Dean John,Mahendran Sekar,Trideep Saikia,Puvanan Karunanithi,Mohd Hayrie Mohd Hatta,Kolajo Adedamola Akinyede

Published Date

2023/8

Engineering of ternary photocatalysts nanocomposites based NiS/ZrO2/CdS for boosting of photocatalytic degradation of organic pollutants

The key prerequisite for a clean and economical industrial process is a cleaner manufacturing process coupled with sustainability. Additionally, the limited resources for drinking water and the world's rapid population expansion foresaw water crises in several nations. To this end, in this study, novel dual Z-scheme NiS/ZrO2/CdS (NZC) heterojunction photocatalysts were developed. The photodegradation efficiency of the photocatalyst was studied by targeting Tetracycline under direct sunlight radiation which reveals that the NZC ternary nano-photocatalyst exhibits a total removal efficiency of 97.05 % within 120 min and k = 0.0281 min−1, which is the highest compared to bare ZrO2, CdS, NiS, binary CdS/ZrO2 and NiS/ZrO2 heterojunctions. To analyze and understand the properties of the NiS/ZrO2/CdS composite, various measurement techniques such as XRD, FT-IR, SEM, TEM, HR-TEM, BET, EDX, XPS, DRs, PL …

Authors

Mirna Omar,Sarah Omar,Abdelazeem Eltaweil,Gehan M El-Subruiti,Nour F Attia

Journal

Surfaces and Interfaces

Published Date

2023/12/1

Fabrication of grafted carboxymethyl cellulose superabsorbent hydrogel for water retention and sustained release of ethephon in sandy soil

The present study aimed to develop an efficient superabsorbent hydrogel for water conservation and slow release of Ethephon in sandy soil. Herein, carboxymethyl cellulose (CMC) was grafted via a free radical polymerization technique with acrylamide and 2-Acrylamido-2-methylpropanesulfonic acid (AMPS) as hydrophilic monomers. The developed CMC-g-(PAM-co-PAMPS) graft copolymer superabsorbent hydrogel was characterized by FTIR, TGA, and SEM analysis to prove the occurrence of the grafting process. Several factors affecting the grafting process were investigated, while maximum grafting (%) value reached 91%. Moreover, increasing AMPS ratio obviously improved the swelling degree of the developed hydrogel with a maximal value of 17,770%. Moreover, addition of 2% of hydrogel to sandy soil potentially enhanced the water retention by 47% compared to pure sandy soil which retained about 7 …

Authors

Ahmed M Omer,Tamer M Tamer,Mohamed E Hassan,Randa E Khalifa,Eman M Abd El-Monaem,Abdelazeem S Eltaweil,Mohamed S Mohy Eldin

Journal

Arabian Journal for Science and Engineering

Published Date

2023/1

Efficient loading and delivery of ciprofloxacin by smart alginate/carboxylated graphene oxide/aminated chitosan composite microbeads: In vitro release and kinetic studies

New composite microbeads were formulated as smart pH-sensitive vehicle for efficient delivery of ciprofloxacin (CIP) drug. Herein, carboxylated graphene oxide (CGO) was successfully impregnated into alginate (Alg) microbeads, which were then coated with aminated chitosan (AmCs) layer to form core–shell Alg/CGO@AmCs composite microbeads. Diverse analysis tools comprising FTIR, TGA, XRD and SEM were employed to characterize the developed carriers, while their swelling profiles and pH-sensitivity were examined under different pHs. The results clarified that increasing CGO and AmCs concentrations in microbeads matrix greatly protected Alg microbeads from fast disintegration at colon pH and prolonged their swelling time. Moreover, about 94.65 % of CIP drug was successfully loaded by Alg/CGO@AmCs composite microbeads compared to 61.95 % for Alg microbeads, confirming their reduced …

Authors

Abdelazeem S Eltaweil,Maha S Ahmed,Gehan M El-Subruiti,Randa E Khalifa,Ahmed M Omer

Journal

Arabian Journal of Chemistry

Published Date

2023/4/1

Biofuel production, hydrogen production and water remediation by photocatalysis, biocatalysis and electrocatalysis

The energy crisis and environmental pollution have recently fostered research on efficient methods such as environmental catalysis to produce biofuel and to clean water. Environmental catalysis refers to green catalysts used to breakdown pollutants or produce chemicals without generating undesirable by-products. For example, catalysts derived from waste or inexpensive materials are promising for the circular economy. Here we review environmental photocatalysis, biocatalysis, and electrocatalysis, with focus on catalyst synthesis, structure, and applications. Common catalysts include biomass-derived materials, metal–organic frameworks, non-noble metals nanoparticles, nanocomposites and enzymes. Structure characterization is done by Brunauer–Emmett–Teller isotherm, thermogravimetry, X-ray diffraction and photoelectron spectroscopy. We found that water pollutants can be degraded with an efficiency …

Authors

Ahmed I. Osman,Ahmed M. Elgarahy,Abdelazeem S. Eltaweil,Eman M. Abd El-Monaem,Hisham G. El-Aqapa,Yuri Park,Yuhoon Hwang,Ali Ayati,Mohamed Farghali,Ikko Ihara,Ala'a H. Al-Muhtaseb,David W. Rooney,Pow-Seng Yap,Mika Sillanpää

Journal

Environmental Chemistry Letters

Published Date

2023/6

Construction of efficient Ni-FeLDH@ MWCNT@ Cellulose acetate floatable microbeads for Cr (VI) removal: Performance and mechanism

Water pollution is an aggravating dilemma that is extending around the world, threatening human survival. Strikingly, the notorious heavy metals like hexavalent chromium ions (Cr6+) cause environmental problems raising awareness of the essentials for finding feasible solutions. For this purpose, the self-floating Ni-FeLDH@MWCNT@CA microbeads were prepared for removing Cr6+. The morphological, thermal, and composition characteristics of Ni-FeLDH@MWCNT@CA microbeads were analyzed using XRD, FTIR, TGA, SEM, XPS, and zeta potential. Notably, the adsorption aptitude of Cr6+ was enhanced by raising the MWCNTs proportion to 5 wt% in microbeads. The Cr6+ adsorption onto Ni-FeLDH@MWCNT@CA fitted Langmuir and Freundlich isotherm models with qm of 384.62 mg/g at pH 3 and 298 K. The adsorption process was described kinetically by the pseudo-2nd order model. More importantly, the …

Authors

Ahmed M Omer,Gehad S Elgarhy,Gehan M El-Subruiti,Eman M Abd El-Monaem,Abdelazeem S Eltaweil

Journal

Carbohydrate Polymers

Published Date

2023/7/1

Durable and low-cost Chitosan decorated Fe/MOF-5 bimetallic MOF composite film for high performance of the Congo red adsorption

The auspicious merits of polysaccharides make them eminent choices in numerous fields, particularly water remediation. Nonetheless, polysaccharides like chitosan (CTS) suffer from low adsorbability. Meanwhile, the recent revolution in material science has produced substances with supreme adsorbability, such as metal-organic frameworks (MOFs). Consequently, the Fe/MOF-5@CTS composite film was synthesized by doping a low amount (5 wt%) of Fe/MOF-5 into the CTS film. The crystallinity, morphology, composition, and surface charge of the Fe/MOF-5@CTS composite film were identified using multiple characterization analyses. Furthermore, the adsorption property of Fe/MOF-5@CTS was examined for the removal of Congo red (CR). Surprisingly, the Qmax of CR onto Fe/MOF-5@CTS reached 219.78 mg/g. Additionally, the composite film only lost 18.54% of its capacity after ten cycles. The selectivity test …

Authors

Eman M Abd El-Monaem,Ahmed M Omer,Abdelazeem S Eltaweil

Journal

Journal of Polymers and the Environment

Published Date

2023/11/14

Novel reusable amine-functionalized cellulose acetate beads impregnated aminated graphene oxide for adsorptive removal of hexavalent chromium ions

In this study, a multi-featured adsorbent was developed for the adsorptive removal of hexavalent chromium (Cr6+) ions. Herein, aminated graphene oxide (GO-NH2) was firstly synthetized and incorporated into cellulose acetate beads (CA) which were followed by surface amine-functionalization process. Varies characterization tools such as FT-IR spectroscopy, SEM, TGA, XRD, BET, XPS and zeta potential were employed to ensure the successful fabrication of GO-NH2@CA-NH2 composite beads. An enhancement in the adsorption performance was attained, while the adsorption equilibrium was closely gotten within only 60 min. Therefore, the adsorption capacity was boosted with increasing GO-NH2 ratio in the beads matrix from 10 to 25%. Furthermore, the adsorption process agreed with Freundlich isotherm model with a supreme adsorption capacity of 410.21 mg/g at pH 2, while data followed the pseudo …

Authors

Ahmed M Omer,Eman M Abd El-Monaem,Abdelazeem S Eltaweil

Journal

International Journal of Biological Macromolecules

Published Date

2022/5/31

Preparation of Lambda-Cyhalothrin-Loaded Chitosan Nanoparticles and Their Bioactivity against Drosophila suzukii

The encapsulation of pesticides within nanoparticles is a promising approach of advanced technology in sustainable agriculture. Lambda-cyhalothrin (LC) was encapsulated by the ionotropic gelation technique into chitosan (CS)/tripolyphosphate (TPP) and CS/alginate (ALG) matrixes. CS-LC nanoparticles were characterized, and their efficacy was then evaluated against the key pest of soft fruits in Europe and the United States, Drosophila suzukii. The encapsulation efficiency (74%), nanoparticle yield (80%), polydispersity index (0.341), zeta potential (−23.1 mV) and particle size (278 nm) were determined at the optimum conditions. FTIR confirmed the cross-linkage between CS and TPP/ALG in the nanoparticles. The optimum formula recommended by the fractional factorial design was associated with the formulation variables of CS of high or low molecular weight, cross-linking agent (TPP), LC concentration (1.5% w/v) and stirring rate (1500 rpm), showing the highest desirability value (0.5511). CS-LC nanoparticles of the lowest particle size (278 nm) exhibited the highest percent mortality of D. suzukii males (86%) and females (84%), exceeding that caused by the commercial product (Karate-zeon® 10% CS) at 2 HAT. This is the first work to use the ionic gelation technique to make LC nanoparticles, to the best of our knowledge. The encapsulation of chemical pesticides within biodegradable polymeric nanoparticles could be helpful for establishing a sustainable IPM strategy with benefits for human and environmental health and the lifetime of pesticides.

Authors

Rady Shawer,Eman S El-Leithy,Rania S Abdel-Rashid,Abdelazeem S Eltaweil,Rowida S Baeshen,Nicola Mori

Journal

Nanomaterials

Published Date

2022/9/8

Biogenic synthesis, characterization, antimicrobial, antioxidant, antidiabetic, and catalytic applications of platinum nanoparticles synthesized from Polygonum salicifolium leaves

The aqueous extract of P. salicifolium leaves was employed in the green synthesis of platinum nanoparticles (PS-PtNPs) by an immediate, one step, cost-effective procedure in the current investigation. PS-PtNPs were characterized via several techniques including UV-Visible spectroscopy, Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), High-resolution Transmission electron microscope (HRTEM), Selected Area Electron Diffraction (SAED), Energy Dispersive X-ray spectroscopy (EDX), EDX elemental mapping, and X-ray Photoelectron Spectroscopy (XPS) and Zeta potential. The produced PS-PtNPs were dark brown in color with almost spherical shape in the size range from 1 to 3 nm. The plasmon peak at 295 nm clarified the biogenic synthesis of PS-PtNPs utilizing P. salicifolium aqueous extract. Moreover, the synthesized PS-PtNPs possessed high stability due to its zeta potential of – 25 …

Authors

Mohamed Hosny,Manal Fawzy,Esmail M El-Fakharany,Ahmed M Omer,Eman M Abd El-Monaem,Randa E Khalifa,Abdelazeem S Eltaweil

Journal

Journal of Environmental Chemical Engineering

Published Date

2022/2/1

Recent developments in alginate-based adsorbents for removing phosphate ions from wastewater: a review

The huge development of the industrial sector has resulted in the release of large quantities of phosphate anions which adversely affect the environment, human health, and aquatic ecosystems. Naturally occurring biopolymers have attracted considerable attention as efficient adsorbents for phosphate anions due to their biocompatibility, biodegradability, environmentally-friendly nature, low-cost production, availability in nature, and ease of modification. Amongst them, alginate-based adsorbents are considered one of the most effective adsorbents for removing various types of pollutants from industrial wastewater. The presence of active COOH and OH− groups along the alginate backbone facilitate its physical and chemical modifications and participate in various possible adsorption mechanisms of phosphate anions. Herein, we focus our attention on presenting a comprehensive overview of recent advances in …

Authors

Abdelazeem S Eltaweil,Eman M Abd El-Monaem,Hala M Elshishini,Hisham G El-Aqapa,Mohamed Hosny,Ahmed M Abdelfatah,Maha S Ahmed,Eman Nasr Hammad,Gehan M El-Subruiti,Manal Fawzy,Ahmed M Omer

Published Date

2022

Synthesis of a new magnetic Sulfacetamide-Ethylacetoacetate hydrazone-chitosan Schiff-base for Cr (VI) removal

In this study, a novel magnetic organic-inorganic composite was fabricated. Chitosan, sulfacetamide and ethylacetoacetae were used to prepare a new Sulfacetamide-Ethylacetoacetate hydrazone-chitosan Schiff-base (SEH-CSB) with a variety of active sites that capable of forming coordinate covalent bonds with Cr(VI). This was followed by modification of the formed SHE-CSB with NiFe2O4 to obtain the magnetic Chitosan-Schiff-base composite (NiFe2O4@SEH-CSB). NiFe2O4@SEH-CSB was characterized using FTIR, zeta potential, SEM, VSM and XPS. Results clarified that SHE played a crucial role in the removal of Cr(VI). The removal of Cr(VI) on NiFe2O4@SEH-CSB was found to be more fitted to pseudo-second order kinetics model and Freundlich isotherm. Besides, the maximum adsorption capacity of NiFe2O4@SEH-CSB towards Cr(VI) was found to be 373.61 mg/g. The plausible mechanism for the …

Authors

Abdelazeem S Eltaweil,Omar A Hashem,Hamida Abdel-Hamid,Eman M Abd El-Monaem,Mohammed Salah Ayoup

Journal

International Journal of Biological Macromolecules

Published Date

2022/12/1

Green synthesis of bimetallic Ag/ZnO@ Biohar nanocomposite for photocatalytic degradation of tetracycline, antibacterial and antioxidant activities

In this work, a simple and green synthesis procedure for phytofabrication Zinc oxide-silver supported biochar nanocomposite (Ag/ZnO@BC) via Persicaria salicifolia biomass is investigated for the first time to uphold numerous green chemistry such as less hazardous chemical syntheses. XRD technique showed the crystal structure of the phytosynthesized Ag/ZnO@BC, whereas UV–visible spectroscopy, FT-IR, SEM, EDX, TEM, and XPS analyses indicated the successful biosynthesis of the nanocomposite. Testing the photocatalytic potential of this novel nanocomposite in the removal of TC under different conditions unraveled its powerful photodegradation efficiency that reached 70.3% under the optimum reaction conditions: TC concentration; 50 ppm, pH; 6, a dose of Ag/ZnO@BC; 0.01 g, temperature; 25 °C, and H2O2 concentration; 100 mM. The reusability of Ag/ZnO@BC was evident as it reached 53% after six …

Authors

Mohamed Hosny,Manal Fawzy,Abdelazeem S Eltaweil

Journal

Scientific Reports

Published Date

2022/5/5

Cellulose nanocrystals and its hybrid composite with inorganic nanotubes as green tool for historical paper conservation

New and innovative conservative coating layer for historical paper consolidation was developed. The smart coating was developed based on cellulose nanocrystals of an average diameter of 10 nm extracted from cotton fiber. Then, inorganic halloysite nanotubes were uniformly dispersed in cellulose nanocrystals colloidal solution producing new transparent reinforcing composite for historical paper. The mass loadings of both cellulose nanocrystals and nanotubes were altered and studied. The new coating was applied for conservation of real written historic paper produced last century. The tensile strength and thermal stability of the consolidated historic paper was significantly improved. The tensile strength of reinforced historic paper achieved enhancement by 28% and two-fold compared to pristine historic paper before and after thermal aging, respectively. Besides, the calorimetric measurement indicated the …

Authors

Tamer E Elmetwaly,Sawsan S Darwish,Nour F Attia,Rushdya RA Hassan,Amal A El Ebissy,Abdelazeem S Eltaweil,Ahmed M Omer,Hesham R El-Seedi,Sally EA Elashery

Journal

Progress in Organic Coatings

Published Date

2022/7/1

Green synthesis of platinum nanoparticles using Atriplex halimus leaves for potential antimicrobial, antioxidant, and catalytic applications

Herein, green platinum nanoparticles (PtNPs) were synthesized using an aqueous extract of Atriplex halimus leaves as a reductant. Atriplex platinum nanoparticles (At-PtNPs) were stable for up to three months. At-PtNPs were characterized by several techniques including UV–Visible spectroscopy, Fourier Transform Infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX), EDX elemental mapping, High-resolution Transmission electron microscope (HRTEM), Selected Area Electron Diffraction (SAED), and X-ray Photoelectron Spectroscopy (XPS) and Zeta measurements. At-PtNPs were black-colored and mainly spherical with a plasmon peak at 295 nm with ultra-small particle size (1–3 nm) and high surface charge (−25.4 mV). At-PtNPs were verified as a superb catalyst as they were able to catalytically degrade MB dye. At-PtNPs exhibited a high antibacterial efficiency …

Authors

Abdelazeem S Eltaweil,Manal Fawzy,Mohamed Hosny,Eman M Abd El-Monaem,Tamer M Tamer,Ahmed M Omer

Journal

Arabian Journal of Chemistry

Published Date

2022/1/1

Insights into recent advances of chitosan-based adsorbents for sustainable removal of heavy metals and anions

With globally increased human population and industrialization, the natural sources of water are reduced and then contaminated. Therefore, development of advanced technologies for the efficient water treatment is becoming of the scope of each of the nation. One of the cost-effective and well-known technologies for wastewater treatment is adsorption of contaminants by natural biopolymer like chitosan (CS) due to its unique features such as availability, biodegradability, biocompatibility, eco-friendly and low-cost production. However, Cs suffers considerable limitations such as low adsorption capacity, low surface area and limited reusability. Thence, this review intended to provide an overview for recent advances of chitosan-based adsorbents that established better adsorption activities towards various hazard heavy metals, including: As(III), As(V), Cu(II), Cr(VI), Pb(II) and Cd(II) ions. In addition, the capabilities of …

Authors

Ahmed M Omer,Rana Dey,Abdelazeem S Eltaweil,Eman M Abd El-Monaem,Zyta M Ziora

Published Date

2022/2/1

Sustainable adsorptive removal of antibiotic residues by chitosan composites: An insight into current developments and future recommendations

During COVID-19 crisis, water pollution caused by pharmaceutical residuals have enormously aggravated since millions of patients worldwide are consuming tons of drugs daily. Antibiotics are the preponderance pharmaceutical pollutants in water bodies that surely cause a real threat to human life and ecosystems. The excellent characteristics of chitosan such as nontoxicity, easy functionality, biodegradability, availability in nature and the abundant hydroxyl and amine groups onto its backbone make it a promising adsorbent. Herein, we aimed to provide a comprehensive overview of recent published research papers regarding the removal of antibiotics by chitosan composite-based adsorbents. The structure, ionic form, optimum removal pH and λmax of the most common antibiotics including Tetracycline, Ciprofloxacin, Amoxicillin, Levofloxacin, Ceftriaxone, Erythromycin, Norfloxacin, Ofloxacin, Doxycycline …

Authors

Eman M Abd El-Monaem,Abdelazeem S Eltaweil,Hala M Elshishini,Mohamed Hosny,Mohamed M Abou Alsoaud,Nour F Attia,Gehan M El-Subruiti,Ahmed M Omer

Published Date

2022/5/1

Phytofabrication of bimetallic silver-copper/biochar nanocomposite for environmental and medical applications

In the current study, a novel, green, low-cost, and sustainable path for the phyto-fabrication of Ag–Cu biochar nanocomposite (Ag–Cu/biochar) by Atriplex halimus biomass and aqueous extract is described. Surface plasmon resonance peaks were detected at 450 nm and 580 nm signifying the formation of both silver and copper nanoparticles, respectively on the biochar surface. XRD analysis confirmed the crystal structure of the phytosynthesized Ag–Cu/biochar whereas FT-IR, SEM, EDX, and XPS analyses confirmed the successful phytofabrication of the composite. Ag and Cu nanoparticles loaded on the biochar surface were almost spherically-shaped with a particle size ranging from 25 nm to 45 nm. Zeta potential of −25.5 mV showed the stability of Ag–Cu/biochar. The potential of this novel nanocomposite in the removal of doxycycline (DOX) was evident under different conditions as it reached nearly 100 …

Authors

Mohamed Hosny,Manal Fawzy,Abdelazeem S Eltaweil

Journal

Journal of Environmental Management

Published Date

2022/8/15

Iron oxide nanoparticles and their pharmaceutical applications

The importance of different polymorphic forms of iron oxide nanoparticles attracted a lot of attentions in various applications due to their unique electrical, optical and magnetic properties. Moreover, the excellent biocompatibility, high surface area, spherical shape, tunable nanoscale size and the availability of synthesis route make them desirable in various biological and pharmaceutical applications. To this aim, in this review, different synthesis methods of iron oxide nanoparticles were discussed, also the main characterization techniques used for elucidation of the iron oxide nanoparticles were reviewed. The exploitation of iron oxide nanoparticles-based systems as anticancer, antiviral, antimicrobial agents and its involvement in drug delivery system were reviewed in details. Additionally, the influence of nanoparticles size and the reagent type and conditions utilized in synthesis and their pharmaceutical …

Authors

Nour F Attia,Eman M Abd El-Monaem,Hisham G El-Aqapa,Sally EA Elashery,Abdelazeem S Eltaweil,Misara El Kady,Shaden AM Khalifa,Hamada B Hawash,Hesham R El-Seedi

Published Date

2022/10/1

Musca domestica (Diptera: Muscidae) as a biological model for the assessment of magnetite nanoparticles toxicity

The use of nanoparticles (NPs) is rapidly expanding; there is a critical need for efficient assays to first determine the potential toxicity of NPs before their use in human applications. Magnetite nanoparticles (Fe3O4 NPs) have tremendous applications which include cell separation, arsenic removal from water and DNA separation. Spherically shaped Fe3O4 NPs with sizes ranging from 23 to 30 nm were used in this study.The housefly, Musca domestica is the most common fly species. It is present worldwide and considered to be an important medical insect which can carry and transmit over 100 human pathogens and zoonotic agents. It has been used in this study to assess Fe3O4NPs toxicity and give us an overview of their impact.The larvicidal activity of Fe3O4NPs was tested against the third instar larvae of M. domestica. We investigated the effects of six varying concentrations (15, 30, 45, 60, 75 and 90 μg/mL …

Authors

Noura A Toto,Hanan I Elhenawy,Abdelazeem S Eltaweil,Saeed El-Ashram,Lamia M El-Samad,Bernard Moussian,Abeer El Wakil

Journal

Science of the Total Environment

Published Date

2022/2/1

Plant-assisted synthesis of gold nanoparticles for photocatalytic, anticancer, and antioxidant applications

The current study is the first to disclose a quick, cost-effective, and environmentally safe phytofabrication of gold nanoparticles (AuNPs) that remained stable for three months utilizing the aqueous extract of T. capensis leaves to uphold the principles of green chemistry such as less hazardous chemical syntheses, safer solvents and auxiliaries, design for energy efficiency, and use of renewable feedstocks. Several approaches were used to describe T. capensis-AuNPs, with the findings revealing the successful phytoformation of crystalline AuNPs with a dark brown color, spherical nanoparticles with a size range of 10–35 nm, a surface plasmon peak at 515 nm, and a surface charge of − 24.5 mV. T. capensis-AuNPs showed 72% photodegradation efficacy against malachite green. The MTT experiment revealed that T. capensis-AuNPs and T. capensis extract had excellent potency in preventing the development and …

Authors

Mohamed Hosny,Manal Fawzy,Yaser A El-Badry,Enas E Hussein,Abdelazeem S Eltaweil

Journal

Journal of Saudi Chemical Society

Published Date

2022/3/1

Sulfonated graphene oxide impregnated cellulose acetate floated beads for adsorption of methylene blue dye: optimization using response surface methodology

New multi-featured adsorbent beads were fabricated through impregnation of sulfonated graphene (SGO) oxide into cellulose acetate (CA) beads for fast adsorption of cationic methylene blue (MB) dye. The formulated SGO@CA composite beads were thoroughly characterized by several tools including FTIR, TGA, SEM, XRD, XPS and zeta potential. The optimal levels of the most significant identified variables affecting the adsorption process were sequential determined by the response surface methodology (RSM) using Plackett–Burman and Box–Behnken designs. The gained results denoted that the surface of SGO@CA beads displayed the higher negative charges (− 42.2 mV) compared to − 35.7 and − 38.7 mV for pristine CA and SGO, respectively. In addition, the floated SGO@CA beads demonstrated excellent floating property, fast adsorption and easy separation. The adsorption performance was …

Authors

Islam K Basha,Eman M Abd El-Monaem,Randa E Khalifa,Ahmed M Omer,Abdelazeem S Eltaweil

Journal

Scientific Reports

Published Date

2022/6/4

Efficient removal of noxious methylene blue and crystal violet dyes at neutral conditions by reusable montmorillonite/NiFe2O4@amine-functionalized chitosan …

The jeopardy of the synthetic dyes effluents on human health and the environment has swiftly aggravated, threatening human survival. Hence, sustained studies have figured out the most acceptable way to eliminate this poisonous contaminant. Thereby, our investigation aimed to fabricate montmorillonite/magnetic NiFe2O4@amine-functionalized chitosan (MMT-mAmCs) composite as a promising green adsorbent to remove the cationic methylene blue (MB) and crystal violet (CV) dyes from the wastewater in neutral conditions. Interestingly, MMT-mAmCs composite carries high negative charges at a wide pH range from 4 to 11 as clarified from zeta potential measurements, asserting its suitability to adsorb the cationic contaminants. In addition, the experimental study confirmed that the optimum pH to adsorb both MB and CV was pH 7, inferring the ability of MMT-mAmCs to adsorb both cationic dyes in simple …

Authors

Hassanien Gomaa,Eman M Abd El-Monaem,Abdelazeem S Eltaweil,Ahmed M Omer

Journal

Scientific Reports

Published Date

2022/9/15

Facile synthesis of gold nanoparticles for anticancer, antioxidant applications, and photocatalytic degradation of toxic organic pollutants

In the current study, a facile, rapid, and ecologically safe photosynthesis of gold nanoparticles (AuNPs) that remained stable for 3 months is reported to advocate the main aspects of green chemistry, such as safer solvents and auxiliaries, and the use of renewable feedstock. Zi-AuNPs were phytosynthesized by the aqueous extract of Ziziphus spina-christi leaves, and numerous techniques were employed for their characterization. The results demonstrated the successful phytofabrication of crystalline AuNPs with brownish-black color, spherical nanoparticles with a size between 0 and 10 nm, a plasmon peak at 540 nm, and a surface charge of −25.7 mV. Zi-AuNPs showed an effective photodegradation efficiency (81.14%) against malachite green and a good recycling capacity of 69.2% after five cycles of regeneration. The cytotoxicity test by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT …

Authors

Mohamed Hosny,Abdelazeem S Eltaweil,Mohamed Mostafa,Yaser A El-Badry,Enas E Hussein,Ahmed M Omer,Manal Fawzy

Journal

ACS omega

Published Date

2022/1/11

Floatable cellulose acetate beads embedded with flower-like zwitterionic binary MOF/PDA for efficient removal of tetracycline

Removal of pharmaceutical wastes, especially antibiotics from aquatic systems is an imperative issue from both human-health and ecological perspectives. Herein, zwitterionic UiO-66/ZIF-8 binary MOF/polydopamine@cellulose acetate composite (UiO-66/ZIF-8/PDA@CA) were fabricated in the form of floated beads for the adsorptive removal of tetracycline (TC). The formulated composite beads were characterized by FTIR, XRD, SEM, BET, Zeta potential and XPS analysis tools. Under optimum adsorption conditions, the UiO-66/ZIF-8/PDA@CA composite beads demonstrated large specific surface area, good adsorption performance with a relatively short equilibrium time (60 min) and ease separation. Furthermore, the adsorption data fit Temkin > Langmuir > Freundlich with a maximal adsorption capacity of 290.69 mg/g at 25 °C, while the adsorption kinetics were well-described by pseudo-second order kinetics …

Authors

Eman M Abd El-Monaem,Ahmed M Omer,Randa E Khalifa,Abdelazeem S Eltaweil

Journal

Journal of Colloid and Interface Science

Published Date

2022/8/15

Novel biogenic synthesis of a Ag@ Biochar nanocomposite as an antimicrobial agent and photocatalyst for methylene blue degradation

The conventional synthesis of nanomaterials employing physical and chemical methods usually requires high cost and toxic chemicals. Thus, a facile, ecofriendly, cost-effective, novel, and sustainable route for the synthesis of a silver-loaded biochar nanocomposite (Ag@biochar) using Chenopodium ambrosioides leaf extract and biomass is reported for the first time in this study to advocate many of the principles of green chemistry such as safer solvents and auxiliaries. UV spectroscopic analysis at 420 nm indicated the formation of silver nanoparticles (AgNPs). The band gap energy of Ag@biochar was 1.9 eV, confirming its potential use as a photocatalyst. Ag@biochar was found to be photoluminescent at 425 nm. AgNPs on the surface of biochar were predominantly spherical with a size range of 25–35 nm and a surface area of 47.61 m2/g. A zeta potential of −5.87 mV designated the stability of Ag@biochar …

Authors

Abdelazeem S Eltaweil,Ahmed M Abdelfatah,Mohamed Hosny,Manal Fawzy

Journal

ACS omega

Published Date

2022/2/21

Author Correction: Efficient removal of noxious methylene blue and crystal violet dyes at neutral conditions by reusable montmorillonite/NiFe2O4@ amine-functionalized chitosan …

Author Correction: Efficient removal of noxious methylene blue and crystal violet dyes at neutral conditions by reusable montmorillonite/NiFe2O4@amine-functionalized chitosan composite - PMC Back to Top Skip to main content NIH NLM Logo Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation Search PMC Full-Text Archive Search in PMC Advanced Search User Guide Journal List Scientific Reports PMC9758173 Other Formats PDF (960K) Actions Cite Collections Share Permalink Copy RESOURCES Similar articles Cited by other articles Links to NCBI Databases Journal List Scientific Reports PMC9758173 As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with, the contents by NLM or the National Institutes of Health. Learn more: PMC Disclaimer | PMC Copyright Notice Logo of scirep Sci Rep. 2022; …

Authors

Hassanien Gomaa,Eman M Abd El-Monaem,Abdelazeem S Eltaweil,Ahmed M Omer

Journal

Scientific Reports

Published Date

2022

Cobalt nanoparticles supported on reduced amine-functionalized graphene oxide for catalytic reduction of nitroanilines and organic dyes

In our study, a simple strategy to fabricate an efficient cobalt-based nanocatalyst is reported. The as-fabricated cobalt nanoparticles (Co NPs) that supported on reduced amine-functionalized graphene oxide (Co@RGO-NH have been fabricated through reduction of Co and GO-NH2 by sodium borohydride under mild conditions. The morphology, elemental analysis, chemical composition, surface area and magnetic property of the as-fabricated Co@RGO-NH2 nanocatalyst have been investigated using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) and vibrating sample magnetometer (VSM), respectively. Characterization showed that Co@RGO-NH2 nanocatalyst possesses a high surface area (232.05 m2/g) and good magnetic property. Obviously, the as-fabricated Co@RGO-NH2 nanocatalyst exhibited a …

Authors

Eman M Abd El-Monaem,Mona M Abd El-Latif,Abdelazeem S Eltaweil,Gehan M El-Subruiti

Journal

Nano

Published Date

2021/4/20

Facile fabrication of novel magnetic ZIF-67 MOF@ aminated chitosan composite beads for the adsorptive removal of Cr (VI) from aqueous solutions

Metal organic frameworks (MOFs) have become premium candidates for the removal of hazardous contaminants from wastewater. However, MOFs have a vast obstacle which is their poor recyclability. In this study, ZIF-67 was decorated with magnetic Fe3O4 nanoparticles, and then embedded into aminated chitosan (AmCs) matrix to form core-dual shell Fe3O4/ZIF-67@AmCs composite beads. Diverse analysis tools were utilized to ensure the successful fabrication of the magnetic composite beads. The fabricated magnetic composite beads were examined their adsorptive removal aptitude towards toxic Cr(VI) ions. The gained results refereed that a maximum adsorption capacity of 119.05 mg/g was attained by magnetic Fe3O4/ZIF-67@AmCs composite beads at 25 °C. The process obeyed both of Langmuir and Freundlich isotherm models, and the pseudo 2nd order was more suitable kinetic model to represent …

Authors

Ahmed M Omer,Eman M Abd El-Monaem,Mona M Abd El-Latif,Gehan M El-Subruiti,Abdelazeem S Eltaweil

Journal

Carbohydrate Polymers

Published Date

2021/8/1

Chitosan based adsorbents for the removal of phosphate and nitrate: A critical review

The tremendous development in the industrial sector leads to discharging of the several types of effluents containing detrimental contaminants into water sources. Lately, the proliferation of toxic anions particularly phosphates and nitrates onto aquatic systems certainly depreciates the ecological system and causes a deadly serious problem. Chitosan (Cs) is one of the most auspicious biopolymer adsorbents that are being daily developed for removing of various contaminants from polluted water. This is due to its unparalleled benefits involving biocompatibility, non-toxicity, facile modifications and low-cost production. Nevertheless, chitosan displays considerable drawbacks including low adsorption capacity, low surface area and lack of reusability. Therefore, few findings have been established regarding the aptitude of modified chitosan-based adsorbents towards phosphate and nitrate anions. This review …

Authors

Abdelazeem S Eltaweil,Ahmed M Omer,Hisham G El-Aqapa,Nourhan Mohamed Gaber,Nour F Attia,Gehan M El-Subruiti,Mohamed S Mohy-Eldin,Eman M Abd El-Monaem

Published Date

2021/11/15

pH-sensitive alginate/carboxymethyl chitosan/aminated chitosan microcapsules for efficient encapsulation and delivery of diclofenac sodium

To develop an effective pH-sensitive drug carrier, alginate (Alg), carboxymethyl chitosan (CMCs), and aminated chitosan (AmCs) derivatives were employed in this study. A simple ionic gelation technique was employed to formulate Alg-CMCs@AmCs dual polyelectrolyte complexes (PECs) microcapsules as a pH-sensitive carrier for efficient encapsulation and release of diclofenac sodium (DS) drug. The developed microcapsules were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyzer (TGA), and scanning electron microscope (SEM). The results clarified that formation of dual PECs significantly protected Alg microcapsules from rapid disintegration at colon conditions (pH 7.4), and greatly reduced their porosity. In addition, the dual PECs microcapsules can effectively encapsulate 95.4% of DS-drug compared to 86.3 and 68.6% for Alg and Alg-CMCs microcapsules, respectively. Higher DS-release values were achieved in simulated colonic fluid [SCF; pH 7.4] compared to those obtained in simulated gastric fluid [SGF; pH 1.2]. Moreover, the drug burst release was prevented and a sustained DS-release was achieved as the AmCs concentration increased. The results confirmed also that the developed microcapsules were biodegradable in the presence of the lysozyme enzyme. These findings emphasize that the formulated pH-sensitive microcapsules could be applied for the delivery of diclofenac sodium.

Authors

Ahmed M Omer,Maha S Ahmed,Gehan M El-Subruiti,Randa E Khalifa,Abdelazeem S Eltaweil

Journal

Pharmaceutics

Published Date

2021/3/5

Formulation and antibacterial activity evaluation of quaternized aminochitosan membrane for wound dressing applications

Much attention has been paid to chitosan biopolymer for advanced wound dressing owing to its exceptional biological characteristics comprising biodegradability, biocompatibility and respectable antibacterial activity. This study intended to develop a new antibacterial membrane based on quaternized aminochitosan (QAMCS) derivative. Herein, aminochitosan (AMCS) derivative was quaternized by N-(2-Chloroethyl) dimethylamine hydrochloride with different ratios. The pre-fabricated membranes were characterized by several analysis tools. The results indicate that maximum surface potential of +42.2 mV was attained by QAMCS3 membrane compared with +33.6 mV for native AMCS membrane. Moreover, membranes displayed higher surface roughness (1.27 ± 0.24 μm) and higher water uptake value (237 ± 8%) for QAMCS3 compared with 0.81 ± 0.08 μm and 165 ± 6% for neat AMCS membranes. Furthermore, the antibacterial activities were evaluated against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus cereus. Superior antibacterial activities with maximum inhibition values of 80–98% were accomplished by QAMCS3 membranes compared with 57–72% for AMCS membrane. Minimum inhibition concentration (MIC) results denote that the antibacterial activities were significantly boosted with increasing of polymeric sample concentration from 25 to 250 µg/mL. Additionally, all membranes unveiled better biocompatibility and respectable biodegradability, suggesting their possible application for advanced wound dressing.

Authors

Ahmed M Omer,Tamer M Tamer,Randa E Khalifa,Abdelazeem S Eltaweil,Mona M Agwa,Sally Sabra,Mahmoud S Abd-Elmonem,Mohamed S Mohy-Eldin,Zyta M Ziora

Journal

Polymers

Published Date

2021/7/23

Green Synthesis of Nano-Zero-Valent Iron Using Ricinus Communis Seeds Extract: Characterization and Application in the Treatment of Methylene Blue-Polluted …

In this study, the removal of methylene blue dye (MB) from aqueous solution was examined using a novel green adsorbent to overcome the obstacles encountered in chemical methods. Ricinus communis (RC) aqueous seeds extract was herein used as a reducing and capping agent to synthesize a novel nano-zero-valent iron (RC-nZVI) for the adsorption of harmful MB. Structural and morphological characterization of the synthesized RC-nZVI were performed using several techniques, e.g., steady-state absorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and zeta potential. The maximum efficiency of the removal was 96.8% at pH 6 and 25 °C. According to the kinetics study results, the adsorption process obeys the pseudo-first-order …

Authors

Ahmed M Abdelfatah,Manal Fawzy,Abdelazeem S Eltaweil,Mohamed E El-Khouly

Journal

ACS omega

Published Date

2021/9/23

Zero valent iron nanoparticle-loaded nanobentonite intercalated carboxymethyl chitosan for efficient removal of both anionic and cationic dyes

A zero valent iron-loaded nano-bentonite intercalated carboxymethyl chitosan (nZVI@nBent–CMC) composite was fabricated and characterized by FT-IR, TEM, TEM–EDX, XRD, BET surface area, and zeta potential measurements. The as-fabricated nZVI@nBent–CMC composite exhibited excellent removal efficiency for both anionic Congo red (CR) dye and cationic crystal violet (CV) dye. The maximum uptake capacities of CR and CV onto the nZVI@nBent–CMC composite were found to be 884.95 and 505.05 mg/g, respectively. The adsorption process of both dyes well fitted with the Langmuir isotherm model and pseudo-second order kinetic model. Thermodynamic data clarified that the adsorptions of both CR and CV onto the nZVI@nBent–CMC composite are spontaneous processes. Moreover, the adsorption of CR onto the nZVI@nBent–CMC composite was found to be an exothermic process while that of CV …

Authors

Abdelazeem S Eltaweil,Ashraf M El-Tawil,Eman M Abd El-Monaem,Gehan M El-Subruiti

Journal

ACS omega

Published Date

2021/3/1

Highly Efficient Removal for Methylene Blue and Cu2+ onto UiO-66 Metal–Organic Framework/Carboxylated Graphene Oxide-Incorporated Sodium Alginate Beads

Herein, we report a new metal–organic framework (MOF)-based composite beads adsorbent made via incorporating UiO-66 MOF, carboxylated graphene oxide (GOCOOH) into sodium alginate for efficient removal of methylene blue dye, and Cu2+ ions. The successful fabrication of the synthesized UiO-66/GOCOOH@SA composite beads was confirmed by means of X-ray diffraction, Fourier transform infrared, scanning electron microscopy, zeta potential, X-ray photoelectron spectroscopy analysis, and thermogravimetric analysis and BET measurement. The incorporation of both UiO-66 and GOCOOH into SA beads greatly increased their adsorption efficiency for the removal of both MB and Cu2+ with maximum adsorption capacities of 490.72 and 343.49 mg/g, respectively. The removal process of both MB and Cu2+ follows the pseudo-second-order model and Freundlich isotherm model. A plausible adsorption …

Authors

Abdelazeem S Eltaweil,Injy M Mamdouh,Eman M Abd El-Monaem,Gehan M El-Subruiti

Journal

ACS omega

Published Date

2021/9/3

Fabrication of easy separable and reusable MIL-125 (Ti)/MIL-53 (Fe) binary MOF/CNT/Alginate composite microbeads for tetracycline removal from water bodies

In this investigation, we aimed to fabricate easy separable composite microbeads for efficient adsorption of tetracycline (TC) drug. MIL-125(Ti)/MIL-53(Fe) binary metal organic framework (MOF) was synthetized and incorporated with carbon nanotube (CNT) into alginate (Alg) microbeads to form MIL-125(Ti)/MIL-53(Fe)/CNT@Alg composite microbeads. Various tools including FTIR, XRD, SEM, BET, Zeta potential and XPS were applied to characterize the composite microbeads. It was found that the specific surface area of MIL-125(Ti)/MIL-53(Fe)/CNT@Alg microbeads was 273.77 m2/g. The results revealed that the adsorption of TC augmented with rising CNT proportion up to 15 wt% in the microbeads matrix. In addition, the adsorption process followed the pseudo-second-order and well-fitted to Freundlich and Langmuir models with a maximum adsorption capacity of 294.12 mg/g at 25 ◦C and pH 6. Furthermore …

Authors

Ahmed M Omer,Eman M Abd El-Monaem,Gehan M El-Subruiti,Mona M Abd El-Latif,Abdelazeem S Eltaweil

Journal

Scientific reports

Published Date

2021/12/10

Ultra-high adsorption capacity and selective removal of Congo red over aminated graphene oxide modified Mn-doped UiO-66 MOF

A new adsorbent composite Mn-doped UiO-66/Aminated-graphene oxide (Mn-UiO-66@GO-NH2) was synthesized via solvothermal method and well-characterized by XRD, SEM, EDX, TGA, FT-IR, N2 adsorption/desorption analysis and zeta potential. The as-synthesized Mn-UiO-66@GO-NH2 composite showed excellent performance toward Congo red dye adsorption with ultra-high capacity of 1265.82 mg/g. Adsorption performance of Mn-UiO-66@GO-NH2 composite and effect of pH on its adsorption capacity were investigated. The adsorption process fitted well with pseudo-second order and both Langmuir and Freundlich models. Thermodynamic of the process showed that the adsorption of CR on Mn-UiO-66@GO-NH2 composite is an endothermic process. In addition, Mn-UiO-66@GO-NH2 composite displays a good adsorption selectivity toward CR among two other dyes cationic methylene blue (MB) and …

Authors

Abdelazeem S Eltaweil,Hala M Elshishini,Zekry F Ghatass,Gehan M Elsubruiti

Journal

Powder Technology

Published Date

2021

Comparative study on the potentialities of two halophytic species in the green synthesis of gold nanoparticles and their anticancer, antioxidant and catalytic efficiencies

In the current investigation, a comparative study between stems of two halophytic species; Atriplex halimus and Chenopodium amperosidies in a single step, efficient and environmentally safe phytosynthesis of gold nanoparticles (AuNPs) is reported. The green synthesized AuNPs were characterized using various techniques. Results showed the formation of violet-colored, mostly spherical-shaped AuNPs with a particle size of 2–10 nm for A. halimus-AuNPs and up to 40 nm for C. amperosidies-AuNPs. The plasmon peak of UV–Visible spectroscopy appeared at 535 nm for both AuNPs samples, confirming the successful phytosynthesis of AuNPs. The cytotoxicity investigation using MTT assay denoted a comparatively higher efficiency of A. halimus-AuNPs than C. amperosidies-AuNPs in inhibiting the proliferation of human breast cancer cells (MCF7 cell line). The recorded cell viability was 35.64 μg/mL for A …

Authors

Mohamed Hosny,Manal Fawzy,Ahmed M Abdelfatah,Esraa E Fawzy,Abdelazeem S Eltaweil

Journal

Advanced Powder Technology

Published Date

2021/9/1

Efficient adsorptive removal of tetracycline from aqueous solution using phytosynthesized nano-zero valent iron

Recently, nano-zero valent iron (nZVI) has been identified as one of the most promising materials for the removal of a wide range of pharmaceuticals in water. However, nZVI effectiveness in aqueous media is dramatically reduced due to its aggregation and instability. To overcome these problems, castor oil (Ricinus communis Linn.) leaves aqueous extract has been used in this study as a reducing and stabilizing agent to increase the stability of nZVI. The fabricated RCL-nZVI was well characterized using several spectroscopic techniques, e.g., steady-state absorption and fluorescence, SEM, TEM, FTIR, EDS, XRD, XPS, and zeta potential. The green phytosynthesized RCL-nZVI was examined in the adsorptive removal of tetracycline (TC). It was interesting to see that the removal efficiency of TC by RCL-nZVI reached 98% at pH 6 and 25 °C. The efficient removal of TC from the aqueous solution was in accordance …

Authors

Ahmed M Abdelfatah,Manal Fawzy,Mohamed E El-Khouly,Abdelazeem S Eltaweil

Journal

Journal of Saudi Chemical Society

Published Date

2021/12/1

Fabrication of attapulgite/magnetic aminated chitosan composite as efficient and reusable adsorbent for Cr (VI) ions

An efficient composite was constructed based on aminated chitosan (NH2Cs), attapulgite (ATP) clay and magnetic Fe3O4 for adsorptive removal of Cr(VI) ions. The as-fabricated ATP@Fe3O4-NH2Cs composite was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Thermal Gravimetric Analyzer (TGA), Scanning Electron Microscope (SEM), Zeta potential (ZP), Vibrating Sample Magnetometer (VSM), Brunauer–Emmett–Teller method (BET) and X-ray photoelectron spectroscope (XPS). A significant improve in the adsorption profile was established at pH 2 in the order of ATP@Fe3O4-NH2Cs(1:3) > ATP@Fe3O4-NH2Cs(1:1) > ATP@Fe3O4-NH2Cs(3:1) > Fe3O4-NH2Cs > ATP. The maximum removal (%) of Cr(VI) exceeded 94% within a short equilibrium time of 60 min. The adsorption process obeyed the pseudo 2nd order and followed the Langmuir isotherm model with a maximum …

Authors

Abdelazeem S Eltaweil,Eman M Abd El-Monaem,Mohamed S Mohy-Eldin,Ahmed M Omer

Journal

Scientific reports

Published Date

2021/8/16

Recent advances in graphene sheets as new generation of flame retardant materials

Polymeric and textile based materials constitute the majority of market products, however, due to their low thermal stability and high flammability hazards, their uses are limited in some applications. Therefore, flame retardant materials have to be dispersed as fillers in polymer matrix and coated on textile fabrics to enhance their fire safety and thermal stability. Graphene is two-dimensional materials and considered as a promising carbon nanomaterials with sp2-hybridization and with unique properties. In this review article conventional flame retardant and different methods of synthesis of graphene layers were summarized. Also, the possibility of use graphene sheets alone as flame retardant material for polymeric materials was reviewed and compared with other common nanofillers. Graphene sheets and their composite as flame retardant nanofillers for polymers and flame retardant coating for textiles are discussed …

Authors

Nour F Attia,Sally EA Elashery,Asmaa M Zakria,Abdelazeem S Eltaweil,Hyunchul Oh

Published Date

2021/12/1

Carboxymethyl cellulose/carboxylated graphene oxide composite microbeads for efficient adsorption of cationic methylene blue dye

An efficient composite adsorbent was fabricated based on carboxymethyl cellulose (CMC) microbeads incorporated carboxylated graphene oxide (GOCOOH) for the adsorptive removal of cationic methylene blue dye (MB). The developed CMC/GOCOOH composite microbeads were characterized by means of FTIR, TGA, SEM, XPS, BET and zeta potential analysis tools. Various parameters affecting the removal of MB dye such as the amount of GOCOOH, initial MB concentration, adsorbent dosage, pH and medium temperature were optimized using a series of batch adsorption experiments. The experimental data of the adsorption process were more fitted to Langmuir isotherm (R2 = 0.998) with a maximum adsorption capacity of 180.32 mg/g and followed the pseudo-second order kinetic model. Moreover, the adsorption of MB dye onto CMC/GOCOOH composite microbeads was an exothermic process with a …

Authors

Abdelazeem S Eltaweil,Gehad S Elgarhy,Gehan M El-Subruiti,Ahmed M Omer

Journal

International journal of biological macromolecules

Published Date

2020/7/1

Efficient removal of toxic methylene blue (MB) dye from aqueous solution using a metal-organic framework (MOF) MIL-101 (Fe): Isotherms, kinetics, and thermodynamic studies

MIL-101 (Fe) iron-benzene dicarboxylate based metal-organic framework (MOF) was synthesized via a solvothermal method for adsorptive removal of cationic methylene blue (MB) dye from aqueous solution. The prepared MIL-101 (Fe) was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, thermal gravimetric analyzer, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller analysis tools. Various parameters affecting the removal efficiency were deliberated such as pH medium, contact time, solution temperature, MOF dosage, and initial MB dye concentrations. Results showed that MIL-101 (Fe) has a maximum adsorption capacity of 58.82 mg/g at pH 9. Moreover, data obtained from isotherm studies were more fitted to the Langmuir isotherm model (R2= 0.997), while the adsorption kinetics followed the pseudo-second-order model. The thermodynamic studies proved that the adsorption process of MB dye onto MIL-101 (Fe) was spontaneous and endothermic. Besides, MIL-101 (Fe) showed higher adsorption ability towards cationic MB dye compared to the anionic methyl orange dye. Finally, the MIL-101 (Fe) adsorbent showed excellent reusability for removing MB dye with efficiency exceeded 70% after ten consecutive cycles. Therefore, the as-prepared MIL-101 (Fe) could be applied as a reusable adsorbent for removing cationic dyes from their aqueous solutions.

Authors

Abdelazeem S Eltaweil,Eman M Abd El-Monaem,Ahmed M Omer,Randa E Khalifa,Mona M Abd El-Latif,Gehan M El-Subruiti

Journal

Desalin. Water Treat

Published Date

2020/6/1

Fabrication of novel iminodiacetic acid-functionalized carboxymethyl cellulose microbeads for efficient removal of cationic crystal violet dye from aqueous solutions

Novel anionic adsorbent microbeads were fabricated based on surface functionalization of p-benzoquinone-carboxymethyl cellulose (CMC-PBQ) activated microbeads with iminodiacetic acid (IDA). The developed IDA@CMC-PBQ microbeads were characterized by FT-IR, TGA, SEM, XPS and zeta potential analysis tools. Ion exchange capacity measurements proved the successful generation of extra carboxylic groups on the surface of IDA@CMC-PBQ microbeads with a maximum value reached 3.984 meq/g compared to 1.32 meq/g for neat CMC microbeads. The fabricated microbeads were tested for the removal of cationic crystal violet (CV) dye from aqueous solutions under various adsorption conditions. The results clarified that the removal percent of CV dye was augmented and reached a maximum value of 91.56% with increasing IDA concentration up to 0.15 M. Moreover, the experimental data were well …

Authors

Ahmed M Omer,Gehad S Elgarhy,Gehan M El-Subruiti,Randa E Khalifa,Abdelazeem S Eltaweil

Journal

International journal of biological macromolecules

Published Date

2020/4/1

Mesoporous magnetic biochar composite for enhanced adsorption of malachite green dye: Characterization, adsorption kinetics, thermodynamics and isotherms

This study aimed to prepare a corn straw-derived biochar supported nZVI magnetic composite (nZVI/BC) and evaluate its efficiency in adsorption of malachite green dye (MG). The prepared nZVI/BC composite was characterized by XRD, FTIR, TEM, TEM-EDS, VSM, XPS, TGA, zeta potential and BET surface area. The prepared mesoporous composite showed enhanced efficiency for the adsorption of MG dye. Adsorption models and kinetic results indicated that the adsorption of MG onto nZVI/BC composite was more fitted to Langmuir isotherm and follows second order kinetics. Intraparticle diffusion model indicated that the adsorption follows a three steps mechanism. The maximum adsorption capacity of nZVI/BC composite (515.77 mg MG/g composite) was much higher than most of reported biochar adsorbents. The removal process of MG onto nZVI/BC composite does not only proceed via adsorption mechanism …

Authors

AS Eltaweil,H Ali Mohamed,Eman M Abd El-Monaem,GM El-Subruiti

Journal

Advanced Powder Technology

Published Date

2020/3/1

Fabrication of UiO-66/MIL-101 (Fe) binary MOF/carboxylated-GO composite for adsorptive removal of methylene blue dye from aqueous solutions

This study provides a novel composite as an efficient adsorbent of cationic methylene blue dye. UiO-66/MIL-101(Fe) binary metal organic framework (MOF) was fabricated using a solvothermal technique. Additionally, the developed binary MOF was modified with carboxylated graphene oxide (GOCOOH) using a post-synthetic technique. The as-fabricated UiO-66/MIL-101(Fe)-GOCOOH composite was analyzed by FTIR, XRD, SEM, BET, TGA, XPS and zeta potential analysis. The adsorption performance of UiO-66/MIL-101(Fe)-GOCOOH composite was examined for its aptitude to adsorb cationic MB dye using a batch technique. The obtained data revealed that, the developed UiO-66/MIL-101(Fe)-GOCOOH composite exhibited higher adsorption capacity compared to UiO-66/MIL-101(Fe) binary MOF. Adsorption isotherms and kinetic studies revealed that MB dye adsorption onto UiO-66/MIL-101(Fe)-GOCOOH …

Authors

Abdelazeem S Eltaweil,Eman M Abd El-Monaem,Gehan M El-Subruiti,Mona M Abd El-Latif,Ahmed M Omer

Journal

RSC advances

Published Date

2020

Integration between bacterial consortium and magnetite (Fe3O4) nanoparticles for the treatment of oily industrial wastewater

The study aimed to investigate the efficiency of exogenous bacterial consortium (Enterobacter cloacae and Pseudomonas otitidis) decorated (immobilized) with Fe3O4 Nanoparticles for the treatment of petroleum hydrocarbon-contaminated wastewater. Glycine coated magnetite Nanoparticles (Fe3O4 NPs) were prepared using reverse co-precipitation method and were characterized using X-ray diffraction, transmission and scanning electron microscopy and vibrating sample magnetometer. They were used to decorate exogenous bacterial consortium (Enterobacter cloacae and Pseudomonas otitidis) at 3 different Fe3O4/bacteria ratios (1:1, 1:3 and 3:1 w/w). Bioremediation of oil contaminated wastewater collected from one of the petroleum distribution companies, Alexandria was conducted for 168 h using Fe3O4/bacterial association at the best ratio (3:1) and compared with non-decorated consortium and …

Authors

Ebtesam El Bestawy,Basma Farg El-Shatby,Abdelazeem Saad Eltaweil

Journal

World Journal of Microbiology and Biotechnology

Published Date

2020/9

Abdelazeem Saad Eltaweil FAQs

What is Abdelazeem Saad Eltaweil's h-index at Alexandria University?

The h-index of Abdelazeem Saad Eltaweil has been 40 since 2020 and 40 in total.

What are Abdelazeem Saad Eltaweil's top articles?

The articles with the titles of

Rational engineering and fabrication of efficient nanophotocatalysts based on ZnO-SrO-CdS for pharmaceutical pollutants based wastewater degradation

Enhanced Redox Cycle of Rod-Shaped MIL-88A/SnFe 2 O 4@ MXene Sheets for Fenton-like Degradation of Congo Red: Optimization and Mechanism.

Synergistic effect between adsorption and Fenton-like degradation on CoNiFe-LDH/ZIF-8 composite for efficient degradation of doxycycline

The Toxicity of Mercury and Its Chemical Compounds: Molecular Mechanisms and Environmental and Human Health Implications: A Comprehensive Review

Zero-valent iron supported-lemon derived biochar for ultra-fast adsorption of methylene blue

Advances in hydrogen storage materials: harnessing innovative technology, from machine learning to computational chemistry, for energy storage solutions

2D/3D MXene/NiFeMn-layered double hydroxide decorated gelatin for removal of Cr (VI) and Congo red: Performance and mechanism

Synthesis of green nanoparticles for energy, biomedical, environmental, agricultural, and food applications: A review

...

are the top articles of Abdelazeem Saad Eltaweil at Alexandria University.

What are Abdelazeem Saad Eltaweil's research interests?

The research interests of Abdelazeem Saad Eltaweil are: Catalysis, Water treatment, Environmental eng., Chemical Engg., Green synthesis

What is Abdelazeem Saad Eltaweil's total number of citations?

Abdelazeem Saad Eltaweil has 3,448 citations in total.

What are the co-authors of Abdelazeem Saad Eltaweil?

The co-authors of Abdelazeem Saad Eltaweil are Mohamed E. El-Khouly, Hassanien Gomaa, Abeer El Wakil, Mohammed Salah Ayoup, Rady Shawer, Noura Abd El Haleem Toto.

    Co-Authors

    H-index: 49
    Mohamed E. El-Khouly

    Mohamed E. El-Khouly

    Egypt-Japan University of Science and Technology

    H-index: 19
    Hassanien Gomaa

    Hassanien Gomaa

    Al-Azhar University

    H-index: 17
    Abeer El Wakil

    Abeer El Wakil

    Alexandria University

    H-index: 13
    Mohammed Salah Ayoup

    Mohammed Salah Ayoup

    Alexandria University

    H-index: 7
    Rady Shawer

    Rady Shawer

    Alexandria University

    H-index: 6
    Noura Abd El Haleem Toto

    Noura Abd El Haleem Toto

    Damanhour University

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