Abstract
This paper provides information on biosorption of Cu, Zn and Cd by Microcystis sp. in single, bi and trimetallic combination. Highest biosorption of Cu followed by Zn and Cd in single as well as in mixtures containing two or three metals was noticed. The order of inhibition of Cu, Zn and Cd biosorption in bi and trimetallic combinations was suggestive of screening or competition for the binding sites on the cell surface. This observation was reconfirmed by Freundlich adsorption isotherm. Kf values were maximum for Cu (Kf=45.18), followed by Zn (Kf=16.71), and Cd (Kf=15.63) in single metallic system. The Kf values for each test metal was reduced in solution containing more than one metal. Further, the reduction in biosorption of each metal ion due to presence of other metal ion was of greater magnitude at relatively higher concentrations of interfering metal ion. The biosorption of Cu at saturation was less affected when secondary metal (Cd or Zn) was added in the medium. Above results suggest that Microcystis holds great potential for metal biosorption from mixture.
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Pradhan, S., Rai, L. Biotechnological potential of Microcystis sp. in Cu, Zn and Cd biosorption from single and multimetallic systems. Biometals 14, 67–74 (2001). https://doi.org/10.1023/A:1016607729691
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DOI: https://doi.org/10.1023/A:1016607729691