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タグ「241Am」

Speciation of artificial radionuclides 60Co, 137Cs, 152Eu, and 241Am in bottom sediments of the Yenisei river (English available)

contamination and decontamination

 

Author: L. G. Bondareva, A. Ya. Bolsunovskii

Reference: Radiochemistry, 2008

ISSN: 1608-3288

DOI: 10.1134/S1066362208050196

Keywords: bottom of river, 137cs, 60co, 152eu, 241am

Abstract: The speciation of artificial radionuclides 60Co, 137Cs, 152Eu, and 241Am in surface layers of bottom sediments of the Yenisei river, collected within the near zone of impact of the Mining and Chemical Combine (Rosatom), was studied. In these samples the radionuclides 60Co, 152Eu, and 241Am are mainly associated with fractions of humic and fulvic acids. The fraction of 152Eu associated with nonsilicate iron is approximately 92%. The migration capability of radionuclides collected near the Atamanovo settlement decreases in the order 152Eu > 241Am > 60Co > 137Cs. For samples collected near Bol’shoi Balchug settlement, this order is as follows: 152Eu ≈ 241Am > 60Co > 137Cs. The presence of radionuclide-bearing micro-particles in bottom sediments considerably complicates the distribution of radionuclides, in particular, of 241Am and 137Cs, among migration forms.

URL: http://link.springer.com/article/10.1134%2FS1066362208050196?LI=true#

Migration ability of radionuclides in soil-vegetation cover of Belarus after Chernobyl accident

ecology・environment

Title: Migration ability of radionuclides in soil-vegetation cover of Belarus after Chernobyl accident

Author: G.A. Sokolik, T.G. Ivanova, S.L. Leinova, S.V. Ovsiannikova, I.M. Kimlenko

Reference: Environment International, Volume 26, Issue 3, January 2001, Pages 183-187

DOI: http://dx.doi.org/10.1016/S0160-4120(00)00104-5

Keywords: Radionuclides; Cesium-137; Strontium-90; Plutonium-239, 240; Americium-241; “hot” particles; Physicochemical State; Chernobyl accident; Migration parameters; Biological accessibility

Abstract: This paper illustrates the experimental experience achieved in the research of the self-restoration of radioactive-contaminated natural ecosystems. The main directions of studies were: the content and geochemical stability of “hot” particles in radioactive fallout from Chernobyl accident; the physicochemical forms (water-soluble, exchangeable, mobile and fixed) of Cs-137, Sr-90, Pu-239, 240 and Am-241 in the wide varieties of soils; the biological accessibility of radionuclides and their contents in soil pore solutions; and the dynamics and migration parameters of radionuclides vertical redistribution in different landscape conditions.

URL: http://www.sciencedirect.com/science/article/pii/S0160412000001045

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