The capacity of the alga Chlorella vulgaristo remove Cadmium, Nickel and Zinc from waste waters and its kinetics were assessedin long-term experiments. Metal concentration was selected on the basis of individual metal tolerance limit of the alga. Resultsrevealed that adsorption was comparatively more than absorption for all three heavy metals. Concentration (x) and adsorption (y)or absorption (y) followed parabolic path for Cd and Ni ; whereas for Zn the relationship was linear (adsorption) and parabolic +2 +2 +2(absorption). C.vulgaris exhibits great efficiency to combat Cd ,Ni and Zn stresses with the maximum accumulation factor +2 +2 +2of 4.2, 2.08 and 2.66, respectively. Metal tolerance efficiency and higher uptake rates make it a significant algal species forbioremediation purpose, more specifically for Cadmium.
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