Chlorella vulgaris -A Potential Heavy Metal Bioremediator

Renu -, Sunita Dudi, S. Sundaramoorthy

Abstract


The capacity of the alga Chlorella vulgaris to remove Cadmium, Nickel and Zinc from waste waters and its kinetics were assessed in long-term experiments. Metal concentration was selected on the basis of individual metal tolerance limit of the alga. Results revealed 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+2 and Ni+2; whereas for Zn+2 the relationship was linear (adsorption) and parabolic (absorption). C.vulgaris exhibits great efficiency to combat Cd+2 ,Ni+2 and Zn+2 stresses with the maximum accumulation factor of 4.2, 2.08 and 2.66, respectively. Metal tolerance efficiency and higher uptake rates make it a significant algal species for bioremediation purpose, more specifically for Cadmium.

Keywords


Chlorella vulgaris, Bioremediation, Cd+2, Ni+2, Zn+2

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