Biological features of sorption of U(VII) and strontium ions by Bacillus polymyxa IMV 8910 cells

It was found that Bacillus polymyxa IMV 8910 bacterium possesses high sorption capacity with respect to U(VI) and strontium ions. We have investigated the impact of the given elements on the rate of the growth and increment of the bacteria biomass. It has been found that sorption capacity of thermoin-activated biomass does not differ from the intact one; maximum sorption constitutes ∼800 and 330 μmol/g of dry matter respectively for U(VI) and strontium. The inhibition analysis and stimulation of the energy exchange of the cell by glucose showed that the processes of sorption of U(VI) and strontium by the biomass of B. polymyxa IMV 8910 did not depend on metabolic activity of the cell, i.e., are implemented by the mechanism of biosorption.