Siberian Federal University

There are natural radionuclides in the composition of oil and oil products. As a result of accidents oil fall on the surface of the earth is their filtration into the soil. This leads to the accumulation of radionuclides in the soil. Then natural radionuclides migrate into plants and further along the trophic chains. In this paper, using the model experiment was traced the migration of uranium-238 in the soil-plant system using flower culture – marigold (Tagetes erecta). The soil-plant systems were made pollutants: a) oil; b) associated petroleum water; c) the oil mixture containing uranium salt. Soil extracts were prepared by sequential fractionation method. Out of uranium from the soil was determined in extracts. Ammonium acetate extractor was performed from dried plants. The remaining biomass was subjected to wet digestion. It was determined the uranium content in the plants. The experiment showed that about 96 % of the uranium is associated with the soil components (organic matter, clay minerals) after application, and about 2 % of the uranium extracted from the soil together with moving fractions and accumulated in the plant