Alexandria | Egypt
Main Specialties: Biotechnology, Chemistry, Other, Statistics
Additional Specialties: Water & Green Chemistry
Dr. Alaa El Din Mahmoud is currently an academic staff in Environmental Sciences Department of Faculty of Science at Alexandria University. He received his PhD degree from Friedrich-Schiller Jena University, Germany in 2019. Afterwards, he spent 6 months as a postdoctoral researcher in Center for Energy and Environmental Chemistry (CEEC Jena).
His research focuses on Interdisciplinary Environmental issues which are related to water/wastewater treatment, nanotechnology and green chemistry. He was elected as a member counselor for Ph.D. students at Friedrich-Schiller Jena University (DR.FSU) from 2017 to 2019. In addition, he was a mentor for international students within the International mentoring program at the same University in Germany for three years.
He has many peer-reviewed articles, chapters, and 7 conference papers. He has participated in many workshops and conferences in Egypt, Greece, Germany, USA, Luxembourg, Spain, China, Canada, etc. Furthermore, he was the chair of the technical session: “Recent Advances in Wastewater Treatment” (9th IWA International Young Water Professionals Conference 2019 (IYWPC)) in Toronto- Canada, the member of the scientific committee in National PhD students day 2019 in Ouarzazate-Morocco, the member of the technical committee in International conference on Energy Development and Environmental Protection (EDEP 2017, Guilin, China).
In 2013, he was recognized by Alexandria University during the Day of Excellence for scientific contributions in “teaching & research” and was awarded a National Commission Young Scientists Award from UNESCO - Man and the Biosphere program. Recently, he was awarded “2018 American Chemical Society Award for Environmental Chemistry Division” and “DAAD Award for conference and lecture travel in two consecutive years 2018 – 2019”. Among his current activities, Dr. Mahmoud is one of the external Advisory board member in International Journal of Social and Scientific Research (IJSSR) and a reviewer for several prestigious journals in Elsevier, Springer, RSC society and MDPI.
Primary Affiliation: Alexandria University - Alexandria , Egypt
59PubMed Central Citations
J Med Discov
Phytoextraction or immobilization is more cost-effective in the field of removal of heavy metals from contaminated soils. These techniques have fewer side effects than physical and chemical techniques. It is the main and most promising technique, in situ or ex situ treatment/removal of contaminated soils, sediments and water. The use of plants as phytoremediators reduces the amount of inorganic components of soil impurities (heavy metals). The main aim of current study is focus on plants which could accumulate large amounts of these pollutants, but are also characterized by high growth rates, tolerate the toxic effects of heavy metals, and mostly adapted to the local environment and climate. Besides they must be resistant to pathogens and pests, easy to grow and exclude the possibility of contamination of animals and humans through the food chain. This study provides a systematic review of publications related to advances in the phytoremediation treatment of contaminated soils, and briefly explains the current limitations in the use of plants to removal heavy metals from the contaminated soil. The main limiting factor is the entry of heavy metals into animals and humans through the food chain. Another limiting factor is the possible negative impact on the genetics of plants used for soil treatment, because this may facilitate to the extinction of this species plants. The investigation showed that the questions of the influence of heavy metals on plant genes deserve serious attention. This is important to prevent reduce species diversity in nature. However, today these issues are very little studied.
Applied Water Science
The biosorption efficiency of Cd2+ using rice straw was investigated at room temperature (25 ± 4 °C), contact time (2 h) and agitation rate (5 Hz). Experiments studied the effect of three factors, biosorbent dose BD (0.1 and 0.5 g/L), pH (2 and 7) and initial Cd2+concentration X (10 and 100 mg/L) at two levels “low” and “high”. Results showed that, a variation in X from high to low revealed 31 % increase in the Cd2+ biosorption. However, a discrepancy in pH and BD from low to high achieved 28.60 and 23.61 % increase in the removal of Cd2+, respectively. From 23 factorial design, the effects of BD, pH and Xachieved p value equals to 0.2248, 0.1881 and 0.1742, respectively, indicating that the influences are in the order X > pH > BD. Similarly, an adaptive neuro-fuzzy inference system indicated that X is the most influential with training and checking errors of 10.87 and 17.94, respectively. This trend was …
Int J Phytoremediation 2016 ;18(6):619-25
b Physical Oceanography Department , National Institute of Oceanography and Fisheries , Alexandria , Egypt.
In this research, dead leaves of a common ornamental plant, Dracaena draca known also as dragon tree was used as a biosorbent for the removal of Cadmium (Cd(2+)) from aqueous solutions using a full 2(3) factorial experimental design. Three factors were investigated at two different levels, metal ion concentration (X = 10 and 100 ppm), hydrogen ion concentration (Ph = 2 and 7) and biomass dose (BD = 0.1 and 0.5g). Experiments were carried out in duplicates with 50 ml of Cd(2+) solutions at room temperature. When comparing observed values (experimental) with calculated values (model), they were set closely together that allowed suggesting a normal distribution where (R(2) = 0.9938). A characterization of the biosorbent was done by pHzpc and SEM-EDAX. Results also showed that the most significant effect for Cd(2+) biosorption was ascribed to (X). The interaction effects of (pH BD) and (X pH) were found to have significant influence on Cd(2+) removal efficiency. The highest Cd(2+) removal percentage attained by 79.60% at X = 10 ppm, pH = 7 and BD = 0.5g. The reusability of the biosorbent was tested in three desorption cycles and the regeneration efficiency was above 99.7%.
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Mahmoud and Fawzy, J Bioremed Biodeg 2015, 6:4
Journal of Bioremediation & Biodegradation
The combined effects of metal ion concentration (X), hydrogen ion concentration (pH) and biomass dose (BD), on the biosorption of Cadmium Cd(II) were investigated. Two different plant biomasses; rice straw (Oryza sativa) and dragon tree leaves (Dracaena draca) were studied. The optimum conditions were found at (X)=10 ppm, (pH)=7 and (BD)=0.5 g. Under these conditions, desirability values of 0.996 and 0.997 for rice straw and dragon tree leaves were obtained, showing that the calculated model may represent the experimental model and give the desired conditions. The samples before and after biosorption experiments were characterized by Energy Dispersive X-Ray Spectroscopy.