J.L. Chaturvedi College of Engg. 846, New Nandanvan, Nagpur Nagpur (M.S.) 440009 (INDIA)

Metal play an important role in our life. They are essential for Plant/Animal life at trace levels but they become toxic even at a little higher level. Six elements (O, C, H, N, P & S), which contribute almost 98% of the total mass of cell, but unfortunately metal also cause environmental pollution. This is the major concern, because like most organic pollutant can easily be destroyed by combustion has effected on metals. Out of 40 naturally occurring elements detected in living organism about 25 out of them essential for the animals and human beings. Metal like Pb, Hg, As etc. are necessary to human body in a minute quantities but even slight excess is very dangerous. Their proper emphasis has to be given to this fact as it is causing number of diseases to human & even cattle’s metabolism. The conventional methods are useful but now a days various biotechnological based method are more effective & efficient1,2