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Appl Environ Microbiol, April 1998, p. 1545-1547, Vol. 64, No. 4
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Effects of Cellular Metabolism and Viability on Metal Ion Accumulation by Cultured Biomass from a Bloom of the Cyanobacterium Microcystis aeruginosa

D. L. Parker,1,* L. C. Rai,2 N. Mallick,2 P. K. Rai,2 and H. D. Kumar2

Department of Biology and Microbiology, University of Wisconsin Oshkosh, Oshkosh, Wisconsin 54901,1 and Department of Botany, Banaras Hindu University, Varanasi 221005, India2

Received 24 July 1997/Accepted 15 January 1998

The sorption of nickel, cadmium, and copper by cultured biomass from a naturally occurring bloom of Microcystis aeruginosa was demonstrated in two systems: cells suspended in culture medium and cells immobilized in alginate. Incubation in the absence of light, in the presence of metabolic inhibitors, and at 4°C did not substantially decrease the copper accumulation by cells in culture medium. Heat-killed, formaldehyde-treated, and air-dried biomass samples sorbed nearly as much (or in some cases slightly more) copper as did viable samples.

* Corresponding author. Mailing address: Department of Biology and Microbiology, University of Wisconsin, Oshkosh, WI 54901. Phone: (920) 424-3077. Fax: (920) 424-1101. E-mail: parker{at}uwosh.edu.




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