Abdelkader Mohamed

Professor Information

University

Huazhong Agricultural University

Position

PhD

Citations(all)

113

Citations(since 2020)

113

Cited By

12

hIndex(all)

6

hIndex(since 2020)

6

i10Index(all)

2

i10Index(since 2020)

2

Email

University Profile Page

Huazhong Agricultural University

Research & Interests List

cr reduction

cr isotopic fractionation

iron minerals

microbial reduction

Top articles of Abdelkader Mohamed

Effect of intercropping and biochar application on cadmium removal capacity by corchorus olitorius and zea mays

Heavy metals in farmlands represent a severe concern for food security. Particularly with the ongoing increase in its release to the environment. In this regard, intercropping is a natural way to remediate polluted soil via enhancing the phytoremediation efficacy of heavy metals. Besides, biochar amendments were also found to be an effective strategy for the removal of heavy metals from polluted soils. Thus, the present study aimed to compare intercropping and biochar amendments in reducing the potential risk of Cd in both Corchorus olitorius and Zea mays in alkaline soils. The results showed that intercropping with biochar amendment increased the metal removal equivalent ratio by 22.93% as compared to intercropping alone i.e., without biochar amendment. When biochar was applied with the intercropping system, C. olitorius phytoremediation ratio significantly increased by 198.93% as compared to the …

Authors

Shaimaa El-Tohory,Wenzhi Zeng,Jiesheng Huang,Mohamed G Moussa,Liming Dong,Abdelkader Mohamed,Omar Khalifa,Muhammad Hamzah Saleem,Mostafa Zhran,MA Salama,Jingwei Wu

Journal

Environmental Technology & Innovation

Published Date

2023/2/1

Enhanced Cr (VI) bioreduction by biochar: Insight into the persistent free radicals mediated extracellular electron transfer

Biochar can act as a shuttle to accelerate the extracellular electron transfer (EET) by exoelectrogens. However, it is poorly understood how the persistent free radicals (PFRs) in biochar affected EET and the redox reaction. Herein, the effects of the biochar and chitosan modified biochar (CBC) on the Cr(VI) bioreduction by Shewanella oneidensis MR-1 (MR-1) was investigated. Kinetic study indicated that the Cr(VI) bioreduction rate constant by MR-1 was increased by 1.8–33.7 folds in the presence of biochar, and by 2.7–60.2 folds in the presence of CBC, respectively. Moreover, Cr(VI) bioreduction rates increased with the decreasing pH. Results suggested that the electrostatic attraction between Cr(VI) and redox-active particles could accelerate the EET by c-cytochrome due to the promotion of the Cr(VI) migration from aqueous phase to biochar or CBC. Electron paramagnetic resonance analysis suggested that the …

Authors

Cheng Yu,Xiaoxi Zhu,Abdelkader Mohamed,Ke Dai,Peng Cai,Shilin Liu,Qiaoyun Huang,Baoshan Xing

Journal

Journal of Hazardous Materials

Published Date

2023/1/15

Ionic Strength-Dependent Attachment of Pseudomonas aeruginosa PAO1 on Graphene Oxide Surfaces

Graphene oxide (GO) is a widely used antimicrobial and antibiofouling material in surface modification. Although the antibacterial mechanisms of GO have been thoroughly elucidated, the dynamics of bacterial attachment on GO surfaces under environmentally relevant conditions remain largely unknown. In this study, quartz crystal microbalance with dissipation monitoring (QCM-D) was used to examine the dynamic attachment processes of a model organism Pseudomonas aeruginosa PAO1 onto GO surface under different ionic strengths (1–600 mM NaCl). Our results show the highest bacterial attachment at moderate ionic strengths (200–400 mM). The quantitative model of QCM-D reveals that the enhanced bacterial attachment is attributed to the higher contact area between bacterial cells and GO surface. The extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theory and atomic force microscopy (AFM …

Authors

Xinxin Jing,Yichao Wu,Dengjun Wang,Chenchen Qu,Jun Liu,Chunhui Gao,Abdelkader Mohamed,Qiaoyun Huang,Peng Cai,Noha Mohamed Ashry

Journal

Environmental Science & Technology

Published Date

2022/11/15

Evaluation of graphene oxide, chitosan and their complex as antibacterial agents and anticancer apoptotic effect on HeLa cell line

Cancer and bacterial infection are the most serious problems threatening people's lives worldwide. However, the overuse of antibiotics as antibacterial and anticancer treatments can cause side effects and lead to drug-resistant bacteria. Therefore, developing natural materials with excellent antibacterial and anticancer activity is of great importance. In this study, different concentrations of chitosan (CS), graphene oxide (GO), and graphene oxide-chitosan composite (GO-CS) were tested to inhibit the bacterial growth of gram-positive (Bacillus cereus MG257494.1) and gram-negative (Pseudomonas aeruginosa PAO1). Moreover, we used the most efficient natural antibacterial material as an anticancer treatment. The zeta potential is a vital factor for antibacterial and anticancer mechanism, at pH 3–7, the zeta potential of chitosan was positive while at pH 7–12 were negative, however, the zeta potential for GO was negative at all pH values, which (p < 0.05) increased in the GO-CS composite. Chitosan concentrations (0.2 and 1.5%) exhibited antibacterial activity against BC with inhibition zone diameters of 4 and 12 mm, respectively, and against PAO1 with 2 and 10 mm, respectively. Treating BC and PAO1 with GO:CS (1:2) and GO:CS (1:1) gave a larger (p < 0.05) inhibition zone diameter. The viability and proliferation of HeLa cells treated with chitosan were significantly decreased (p < 0.05) from 95.3% at 0% to 12.93%, 10.33%, and 5.93% at 0.2%, 0.4%, and 0.60% concentrations of chitosan, respectively. Furthermore, CS treatment increased the activity of the P53 protein, which serves as a tumor suppressor. This study suggests that chitosan is …

Authors

Noha M Ashry,Halla EK El Bahgy,Abdelkader Mohamed,Nouf H Alsubhi,Ghadeer I Alrefaei,Najat Binothman,Mona Alharbi,Samy Selim,Mohammed S Almuhayawi,Mohanned T Alharbi,Mohammed K Nagshabandi,Ahmed M Saad,Mohamed T El-Saadony,Basel Sitohy

Journal

Frontiers in Microbiology

Published Date

2022/10/4

Molybdenum Role in Nitrogen Bioavailability of Wheat-Soil System Using the Natural 15N Abundance Technique

Molybdenum (Mo) deficiency in the farmland can limit biological nitrogen fixation (BNF) and at the same time restricts the availability and uptake of nitrogen (N) by roots. However, the impact of Mo application on N bioavailability or BNF capacity in wheat-soil systems is still unclear. Mo was applied to the soil as 0 (− Mo) and 0.15 mg kg−1 soil (+ Mo) to investigate the impacts of Mo application on δ15N natural abundance in the wheat-soil system, and the activities of soil enzymes such as nitrogenase, nitrate reductase, and microbial biomass of N, and photosynthetic variables. Mo application increased the net photosynthetic rate, intercellular CO2 concentration, nitrogenase and nitrate reductase activities, and microbial biomass of N in wheat-soil system, suggesting that Mo enhances N bioavailability and reduces nitrate (NO3−) accumulation as well as improving the efficiency of N metabolism in wheat. Hence, N …

Authors

Mohamed G Moussa,Xuecheng Sun,Shaimaa El-Tohory,Abdelkader Mohamed,Muhammad Hamzah Saleem,Muhammad Riaz,Zhihao Dong,Lingzhi He,Chengxiao Hu,Marwa A Ismael

Journal

Journal of Soil Science and Plant Nutrition

Published Date

2022/9

Size-dependent visible-light-enhanced Cr (VI) bioreduction by hematite nanoparticles

Light irradiation would affect the electron transfer between dissimilatory metal-reducing bacteria (DMRB) and semiconducting minerals, which may impose a great influence on the biogeochemistry cycle of heavy metals. However, the size effect of semiconducting minerals on the its electron transfer with DMRB and microbial Cr(VI) reduction under visible light irradiation is little known. Herein, the Cr(VI) reduction by Shewanella oneidensis MR-1 (MR-1) was investigated in the presence of hematite nanoparticles with average diameters of 10 nm and 50 nm in dark and under visible light irradiation. It is found that hematite nanoparticles adhered onto MR-1 cells to form the composites, leading to the decrease in surface sites and Zeta potential. Hematite mediated-Cr(VI) bioreduction rate under visible light irradiation was 0.342 h−1, which is 3.4 folds enhancement compared with that in dark and 4.4 folds compared with …

Authors

Cheng Yu,Lu Yu,Abdelkader Mohamed,Jun Fang,Yichao Wu,Ke Dai,Peng Cai,Qiaoyun Huang

Journal

Chemosphere

Published Date

2022/5/1

Size effect of hematite particles on the Cr (VI) reduction by Shewanella oneidensis MR-1

Microorganisms are commonly bonded to various soil minerals, which may influence the redox processes and bacterial metabolism. However, little is known about the impact of particle size of soil minerals on these redox processes in the subsurface environment. In this study, the Cr(VI) bioreduction by Shewanella oneidensis MR-1 (S. oneidensis) was investigated in the presence of various hematite (α-Fe2O3) particles with average diameters of 1.0 µm (hem-1 µm) and 80.0 nm (hem-80 nm) under different pH conditions. Fourier transformed infrared spectroscopy coupled with two-dimensional correlation spectroscopy (FTIR-2D-COS) analysis and isothermal titration calorimetry (ITC) were used to explore the interaction between S. oneidensis and hematite and monitor the bacterial metabolic activity, respectively. X-ray photoelectron spectroscopy (XPS) was used to elucidate the Cr(VI) removal mechanisms. Our …

Authors

Abdelkader Mohamed,Boya Sun,Cheng Yu,Xuemeng Gu,Noha Ashry,Yassine Riahi,Ke Dai,Qiaoyun Huang

Journal

Journal of Environmental Chemical Engineering

Published Date

2021/4/1

Iron mineral-humic acid complex enhanced Cr (VI) reduction by Shewanella oneidensis MR-1

Microorganisms, iron minerals, and humic acid are widely common in the soil and water environment and closely interact within environmental processes. In this study, the Cr(VI) removal by Shewanella oneidensis MR-1 (S. oneidensis) was examined in the presence of goethite and humic acid (HA) to mimic the real environment situation. Scanning electron microscopy (SEM) combined with energy disperse spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) technologies were used to probe the Cr(VI) reduction mechanism. Our results showed that S. oneidensis alone could reduce 65% of 1.0 mM Cr(VI) after 8 h of the reduction process. Meanwhile, Cr(VI) reduction rate was declined to 56% in the presence of goethite or humic acid. Contrary, the Cr(VI) reduction rate was mightily increased to 79% by the ternary complex of S. oneidensis-goethite-HA where …

Authors

Abdelkader Mohamed,Lu Yu,Yu Fang,Noha Ashry,Yassine Riahi,Intisar Uddin,Ke Dai,Qiaoyun Huang

Journal

Chemosphere

Published Date

2020/5/1

Professor FAQs

What is Abdelkader Mohamed's h-index at Huazhong Agricultural University?

The h-index of Abdelkader Mohamed has been 6 since 2020 and 6 in total.

What are Abdelkader Mohamed's research interests?

The research interests of Abdelkader Mohamed are: cr reduction, cr isotopic fractionation, iron minerals, microbial reduction

What is Abdelkader Mohamed's total number of citations?

Abdelkader Mohamed has 113 citations in total.

What are the co-authors of Abdelkader Mohamed?

The co-authors of Abdelkader Mohamed are Ke Dai.

Co-Authors

H-index: 38
Ke Dai

Ke Dai

Huazhong Agricultural University

academic-engine

Useful Links