Prof. Krishna Gopal Bhattacharyya obtained his PhD and DIC from Imperial College of Science, Technology and Medicine, London. He joined the department of Chemistry, Gauhati University in 1975 and retired as professor in April, 2016. His research interests are in the fields of water, air and soil chemistry, heterogeneous catalysis and general environmental chemistry. He has more than 180 research publications in international and national journal with more than 8000 citation. He is still actively engaged in research. He has also written several books on chemistry and environmental studies.