Elvis Fosso-Kankeu, PhD, is a professor in the Department of Metallurgy, Faculty of Engineering and Built Environment, University of Johannesburg, Doornfontein, Johannesburg, South Africa. His research focuses on the hydrometallurgical extraction of metal from solid phases, the prediction of pollutants dispersion from industrial areas, and the development of effective and sustainable methods for the removal of inorganic and organic pollutants from polluted water. He has published more than 220 papers including journal articles, books, book chapters, and conference proceeding papers. He has won several research awards including the NSTF Award (National Science and Technology Forum: largest science, engineering, technology, and innovation awards in South Africa and are known as the “Science Oscars” of recent times) Engineering Research Capacity Development, in 2019. Bhekie B. Mamba, PhD, is the executive dean of the College of Science, Engineering, and Technology, University of South Africa. Prof Mamba is a visionary and has occupied a number of leadership positions including being a Professor and Head at Department of Applied Chemistry at the University of Johannesburg, and the Director of the Institute of Nanotechnology and Water Research at the University of Johannesburg. He has published about 7 book chapters, over 250 journal papers, about 12 technical reports, and over 50 conference proceedings. His general research interest involves developing advanced technologies for water treatment, which include nanotechnology and membrane technology.