A. K. Gupta earned a PhD in environmental science and engineering at the Indian Institute of Technology Bombay, Mumbai, India. Currently, he is a professor in the environmental engineering division of the civil engineering department at the Indian Institute of Technology Kharagpur, India, and he is actively involved in teaching, research, and consultancy. His research interests include water treatment, environmental impact assessment, monitoring, and modeling of air and water pollution, and geogenic pollutant scavenging. He has more than 60 publications in top-ranking international journals and is a renowned technical consultant in the arena of environmental engineering. S. Ayoob is a professor in the department of civil engineering and the principal of the TKM College of Engineering, Kerala, India. He graduated in civil engineering from the TKM College of Engineering, Kollam, India, and earned his master’s and doctoral degrees at the Indian Institute of Technology Kharagpur, India. He also served as course leader and headed the department of health, safety, and environmental management at the International College of Engineering and Management, the Sultanate of Oman (affiliated with the University of Central Lancashire, UK) for a short period of time.
"""This book recorded the outstanding feat of a chemist who in the 1930s managed to measure a few ppm of fluoride in water; in the days before ion selective electrodes and other modern means, this was a magnificent achievement. Each chapter concludes with a comprehensive list of up-to-date references and a summary of the main points and conclusions; a useful practice which might well be followed by other authors."" —Chromatographia 2016"