Abstract
The nature and content of modified humic acid derivatives influence the intensity of the recovery of Pu, Am, and Corg from soddy podzolic soil with distilled water. Under the dynamic conditions, these radionuclides are recovered more intensely in the presence of carboxylated humic acids, compared to the hydroxymethylated derivatives. When soils with the introduced modified humic acid derivatives are subjected to prolonged washing with distilled water, the radionuclides undergo redistribution within the columns, suggesting their migration. Under the action of dissolved organic substances isolated from soils (low-molecular-weight nonspecific organic compounds and fulvic acids), the radionuclide migration in soils occurs still more intensely. In the course of soil column washing with an aqueous phase containing the dissolved organic matter, Pu and Am pass into the mobile state to a greater extent than in washing the soils with distilled water.
Published Version
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