I express my deep gratitude to Dr. G. Sekaran, Scientist and Head of the Department of the Environmental Technology Lab, CLRI who accepted my request for carrying out my project work. I owe my deep sense of gratitude to Dr. Evvie Chockalingam, for her valuable guidance, constant encouragement, innumerable suggestions, patience and care that she bestowed on me during the course of my project. I would like to thank Dr. G. Sekar, Associate Professor, Department of Chemistry, IIT- Madras, for allowing me to use the facilities available in his lab for my experiments. I would like to thank my...