Chemical and radiochemical characterization of depleted uranium in contaminated soils
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The main results of chemical and radiochemical characterization and fractionation of depleted uranium in soils contaminated during the Balkan conflict in 1999 are presented in the paper. Alpha-spectrometric analysis of used depleted uranium material has shown the presence of man-made radioisotopes U-236, Np-237, and Pu-239,Pu- 240 traces. The fractionation in different soil types was examined by the application of a modified Tessiers five-step sequential chemical extraction procedure, specifically selective to certain physical/chemical associations. After ion-exchange-based radiochemical separation of uranium, depleted uranium is distinguished from naturally occurring uranium in extracts on the basis of the isotopic activity ratios U-234/U-238 and U-235/U-238 and particular substrates for recently present uranium material in soils are indicated.
Извор:Russian Journal of Physical Chemistry A, 2007, 81, 9, 1448-1451
- 8th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Sep 26-29, 2006, Belgrade, Serbia
ISSN: 0036-0244 (print); 1531-863X (electronic)