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Mrs. Alaa El Din Mahmoud
University of Hong Kong, Hong Kong, Hong Kong
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Representative Publications
View All Publications27 November 2022 in Scientific Reports
Journal Article
BNBassant Naiel
Bassant NaielMFManal Ahmed Fawzy
Manal Ahmed FawzyMHMarwa Waseem A. Halmy
Marwa Waseem A. HalmyAMAlaa El Din Mahmoud
Alaa El Din MahmoudIn the present study, a green, sustainable, simple and low-cost method was adopted for the synthesis of ZnO NPs, for the first time, using the aqueous extract of sea lavender, Limonium pruinosum (L.) Chaz., as a reducing, capping, and stabilizing agent. The obtained ZnO NPs were characterized using ultraviolet–visible spectroscopy (UV–VIS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The UV–Vis spectra of the green synthesized ZnO NPs showed a strong absorption peak at about 370 nm. Both electron microscopy and XRD confirmed the hexagonal/cubic crystalline structure of ZnO NPs with an average size ~ 41 nm. It is worth noting that the cytotoxic effect of the ZnO NPs on the investigated cancer cells is dose-dependent. The IC50 of skin cancer was obtained at 409.7 µg/ml ZnO NPs. Also, the phyto-synthesized nanoparticles exhibited potent antibacterial and antifungal activity particularly against Gram negative bacteria Escherichia coli (ATCC 8739) and the pathogenic fungus Candida albicans (ATCC 10221). Furthermore, they showed considerable antioxidant potential. Thus, making them a promising biocompatible candidate for pharmacological and therapeutic applications.
1 January 2022 in Journal of Environmental Management
Journal Article
Sheikh MansoorIFIqra Farooq
Iqra Farooq
MKM. Mubashir Kachroo
M. Mubashir Kachroo
AMAlaa El Din Mahmoud
Alaa El Din MahmoudMFManal Fawzy
Manal Fawzy
Parvaiz Ahmad +4
15 June 2021 in Scientific Reports
Journal Article
AMAlaa El Din Mahmoud
Alaa El Din MahmoudKAKhairia M. Al-Qahtani
Khairia M. Al-Qahtani
SASahab O. Alflaij
Sahab O. Alflaij
SASalma F. Al-Qahtani
Salma F. Al-Qahtani
FAFaten A. Alsamhan
Faten A. Alsamhan
Environmentally friendly copper oxide nanoparticles (CuO NPs) were prepared with a green synthesis route without using hazardous chemicals. Hence, the extracts of mint leaves and orange peels were utilized as reducing agents to synthesize CuO NPs-1 and CuO NPs-2, respectively. The synthesized CuO NPs nanoparticles were characterized using scanning electron microscopy (SEM), Energy Dispersive X-ray Analysis (EDX), BET surface area, Ultraviolet–Visible spectroscopy (UV–Vis), and Fourier Transform Infrared Spectroscopy (FT-IR). Various parameters of batch experiments were considered for the removal of Pb(II), Ni(II), and Cd(II) using the CuO NPs such as nanosorbent dose, contact time, pH, and initial metal concentration. The maximum uptake capacity (qm) of both CuO NPs-1 and CuO NPs-2 followed the order of Pb(II) > Ni(II) > Cd(II). The optimum qm of CuO NPs were 88.80, 54.90, and 15.60 mg g−1 for Pb(II), Ni(II), and Cd(II), respectively and occurred at sorbent dose of 0.33 g L−1 and pH of 6. Furthermore, isotherm and kinetic models were applied to fit the experimental data. Freundlich models (R2 > 0.97) and pseudo-second-order model (R2 > 0.96) were fitted well to the experimental data and the equilibrium of metal adsorption occurred within 60 min.
26 March 2018 in ACS Sustainable Chemistry & Engineering
Journal Article
1 September 2020 in Journal of Environmental Management
Journal Article
AMAlaa El Din Mahmoud
Alaa El Din Mahmoud15 January 2022 in Environmental Chemistry Letters
Journal Article
Willis Gwenzi
Rangabhashiyam SelvasembianNONnanake-Abasi O. Offiong
Nnanake-Abasi O. OffiongAMAlaa El Din Mahmoud
Alaa El Din Mahmoud
Edmond SanganyadoJMJoyabrata Mal
Joyabrata MalAbout Me
Dr. Alaa El Din Mahmoud is an Assistant Professor in the Environmental Sciences Department, Faculty of Science at Alexandria University, Egypt. He received his bachelor's and master’s degrees from Alexandria University and his Ph.D. degree from Friedrich-Schiller University Jena, Germany. His research focuses on interdisciplinary environmental issues: sustainability, waste valorization, water/wastewater treatment, circular economy, machine learning, and green nanotechnology. During his career, he was a visiting Assistant Professor at Temple University (USA), the University of Texas at Austin (USA), and Shanghai University (China). Dr. Alaa El Din Mahmoud has been awarded the Alexandria University Award for Academic Encouragement in the scientific field and the Best Young Researcher Award for his scientific contribution from the RanBal Research Institute & Bentham Science. Furthermore, he was awarded the Fulbright Award (2021), "German Academic Exchange Service; DAAD Award" for conference and lecture travel abroad in two consecutive years (2018 & 2019), Misr El Kheir Foundation award for postgraduates (2014), and the "Young Scientists Award" from UNESCO-MAB program (2013). Dr. Alaa El Din Mahmoud has published more than 55 peer-reviewed international research articles & book chapters. He is an editor for several books with different publishers. Moreover, Dr. Alaa El Din Mahmoud is involved in many collaborative funded local and international research projects.