Chemical forms of radioactive strontium interaction with organic matter of different soil types

Under model experiment conditions, the mechanisms of chemical interaction of 90 Sr with soil organic matter were established. The radionuclide was introduced in soil examples of main soil-types widespread on the European territory of the Russian Federation. It was found that from 40 to 60% of the ra...

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Bibliographic Details
Published in:Moscow University soil science bulletin 2012-07, Vol.67 (3), p.133-136
Main Authors: Fedorkova, M. V., Pakhnenko, E. P., Sanzharova, N. I.
Format: Article
Language:English
Subjects:
Chemical compounds
Earth and Environmental Science
Earth Sciences
Forest soils
Genesis and Geography of Soils
Historical Geology
Minerals
Molecular weight
Paleontology
Radioactivity
Soil sciences
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Summary:Under model experiment conditions, the mechanisms of chemical interaction of 90 Sr with soil organic matter were established. The radionuclide was introduced in soil examples of main soil-types widespread on the European territory of the Russian Federation. It was found that from 40 to 60% of the radionuclide extracted in exchangeable chemical form. In addition, fulvic acids (FA) (fractions I and Ia) absorbed a significant amount of the radionuclide: 25–35%. It was shown that 90 Sr is available for forming chemical compounds with nonspecific organic matter with molecular weight (M) ranging from 180 to 500 g/mol, without reference to soil type. An essential part of radioactive strontium, 18–24% (from introduced 90 Sr), which was associated with high-molecular fraction ( M > 500 g/mol), was detected in chernozems, chestnut soil, and peat soil. In soddy-podzolic soil and light-gray forest soil, it was found mostly (33–34%) with mineral compounds ( M < 180 g/mol).
ISSN:0147-6874
1934-7928
DOI:10.3103/S0147687412030027