Arsenic is known as the king of poisons and had plagued human being since the days of antiquity. It is both a cause of large-scale environmental contamination and serious health hazard. Incidences of arsenic contamination in ground water and the subsequent sufferings of people from arsenic poisoning resulting from drinking arsenic contaminated water have been widely reported in the developed and developing countries. Instances of arsenic contamination in the world are mainly of two categories: (a) natural groundwater contamination; and (b) contamination of water, air and the environment...