[Effect of introduced microorganisms on copper and cobalt mobility in soil]

The paper deals with the change of copper and cobalt mobility in contaminated soil when activating microbiological processes by introduction of sources of carbon, nitrogen, phosphorus, metal-resistant microorganisms. When Bacillus cereus BKM 4368 growing in soil fertilized with glucose one can observe a 5-fold increase of cocentration of heavy-metal mobile forms as compared with sterile soil. The use of acetate as a carbon source and Alcaligenes euthrophus CH 34 culture as inoculum will provide a 3-fold decrease of concentration of copper and cobalt mobile forms in the process of microorganisms growth. Contribution of the soil microflora to the process of transformation of heavy metals under the investigated conditions was too low. The results obtained give a possibility to regulate the level of mobile forms of heavy metals in soil by means of choosing the adequate sources of carbon and microbial cultures.