Shakir Ali is a hydrogeologist and Postdoctoral Research Fellow at the University of Johannesburg, South Africa. His research focuses on groundwater contamination, fluoride pollution, environmental isotopes, groundwater modelling, and traditional indigenous knowledge. He has published over 35 peer-reviewed articles and edited several books, including Groundwater Quality and Geochemistry in Arid and Semi-Arid Regions, part of Springer’s book series The Handbook of Environmental Chemistry. Dr. Shakir holds a Master’s degree in Hydrogeology from IIT Bombay and a Ph.D. from the University of Delhi. With more than a decade of research and teaching experience, he has received over 1,350 citations on Google Scholar to date.Abdelazim Negm is a renowned expert in hydraulics and water resources at Zagazig University, Egypt, with a Ph.D. in 1992. He has published 400+ research papers, edited several books with Springer, including Groundwater Quality and Geochemistry in Arid and Semi-Arid Regions, published in the Springer book series “The Handbook of Environmental Chemistry”. Dr. Negm has led international projects, delivered keynote talks at global conferences, and served as editor for major journals. He is listed in Marquis Who’s Who and recognized by ABI and IBC for his contributions to water resources management and environmental engineering.