Using the model of silt sediments of different ages and soils contaminated with oil products, the utilizing ability of the saprophytic bacterium Bacillus pumilus was studied. It was established that 7 days after the introduction of silt sediment samples of B. pumilus culture into the samples, there was an increase in the mass concentration of copper, cadmium and lead ions, followed by a decrease in the dynamics after 21 days of bacterial exposure. The mass concentration of zinc ions in the sludge samples decreased in dynamics over the entire duration of the experiment.
