Biodiversity and life on earth is completely linked with environment. Large industrial establishment, intensive agriculture and fuel production in the recent era have resulted in the significant increase in the contaminants that enter in our environment. Among these toxic elements, heavy metals are the most dangerous. The situation is more disastrous in developing countries, where waste water is extensively used for irrigation purposes. Metal pollution is a worldwide problem and serious disturbance to the soil and environment. It is a major constraint to food, feed and industrial raw material...