Abstract
The tannery effluent is a mixture of biogenic matter of hides and a large variety of organic and inorganic chemicals. It usually contains high concentration of toxic metals like copper, chromium, zinc, cadmium, nickel and chemicals like aliphatic sulfonates and cyanides. The use of plants for bioremediation is called as phytoremediation. It involves the use of green plants to decontaminate soil, water and air. It is a cost effective process and the end products are nonhazardous. In the present study a hyper accumulating plant Brassica juncea was grown in different concentrations of effluent and their biochemical parameters carotenoid, chlorophyll, chromium, nickel and zinc were analyzed in leaves, stem and seeds. The results show that the heavy metal contents were higher in stem compared to leaves indicating the transports of these are high in stem. Chlorophyll and carotenoid contents of plants treated with 25 per cent effluent was higher compared to 50 per cent effluent treated plants. Higher the dilution lesser the harmful effect of effluent on the plants.