Due to the consequences of urbanization and industrialization, heavy metal contamination in the environment is a world wide problem, threatening to the plants, animals, and human beings. Most heavy metals occur naturally in soils as trace elements, the biota-require some of these elements as essential micronutrients. These heavy metals at their higher concentrations, found toxic in living organisms. Their release into the environment in biologically available forms, as a result of human activity, may damage or alter both natural and man-made ecosystems. The most obvious sources of metal...