Mihir Kumar Purkait is a professor in the Department of Chemical Engineering, and Dean of Alumni and External Affairs at the Indian Institute of Technology Guwahati, India. His research activities are focused on four distinct areas: advanced separation technologies, waste-to-energy, smart materials, and electrocoagulation. Piyal Mondal is a post-doctoral research associate in the Department of Chemical Engineering at the Indian Institute of Technology Guwahati, India. His research interests lie in green synthesis of metal nanoparticles for real life applications. Niladri Shekhar Samanta is a research scientist in the Centre for the Environment at the Indian Institute of Technology Guwahati, India. His research is dedicated to the synthesis of zeolite from steel industry solid waste (slag) and its utilization in wastewater treatment and environmental remediation. Pranjal Pratim Das is a research scientist in the Department of Chemical Engineering at the Indian Institute of Technology Guwahati, India. His research work is purely dedicated to industrial wastewater treatment via electrochemical (esp. electrocoagulation) and advanced oxidation (esp. ozonation) techniques for the removal of toxic emerging contaminants.