Rajeev Kumar received a M.Sc. in Analytical Chemistry (2006), and M. Phil (2008) and Ph.D. degree in Applied Chemistry (2011) from Aligarh Muslim University, India. He is currently working as associate professor at the Environmental Science Department, King Abdulaziz University, Jeddah, Saudi Arabia. His research activities are in the areas of wastewater treatment and material science. Rajeev studies the adsorption and photocatalytic properties of the nanomaterials for the removal of contaminants from wastewater. He has published more than 50 research articles and chapters in the journals such as the Chemical Engineering Journal, Journal of Colloid and Interface Science, RSC Advances, Journal of Environmental Sciences, Journal of environmental management, Journal of Industrial and Engineering Chemistry, Desalination etc.