Biosorption of uranium (VI), strontium and cesium by cells of Bacillus Polymyxa IMV 8910

Ability of pure culture of Bacillus Polymyxa IMV 8910 to concentrate uranium (VI) and its decay products cesium and strontium from aqueous solutions was investigated. The mechanisms of strontium binding by microbial cells are considered. The main physic-chemical and biological relationships of strontium and biomass interaction were determinated. Sr2+ sorption depends on biosorbent properties, pH, presence of complexation agents and co-ions. The main role of cell surface carboxyl groups in the processes of uranium and strontium sorption was determinated. It is shown, that cesium was not sorbed by bacteria