MIGRATION OF ARTIFICIAL RADIONUCLIDES (137CS, 152EU, 60CO) IN THE BOTTOM SEDIMENTS OF THE YENISEY RIVER (NEAR ZONE OF INFLUENCE OF THE KRASNOYARSK MCP)

Q4 Earth and Planetary Sciences

Geology and Mineral Resources of Siberia Pub Date : 2022-06-01 DOI:10.20403/2078-0575-2022-2-68-77

A. Chuguevsky, M. Melgunov, I. Makarova

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引用次数: 0

Abstract

The distribution nature of the artificial gamma-emitting radionuclides (137Cs, 152Eu, 154Eu, 155Eu, 60Co) in vertical columns of the Yenisei River bottom sediments selected in the near zone of influence of the Krasnoyarsk MCP was revealed. It is shown that the mineral composition of bottom sediments does not change with the depth and is mainly represented by quartz, plagioclase and potassium feldspar, with a small amount of amphibole, chlorite, mica. It was found that the exchangeable and carbonate forms contain, on average, 16% of 152Eu, 22% of137Cs and 15% of 60Co being found in bottom sediments. Radionuclides presented in these forms can pass into an aqueous solution and be involved in secondary migration under stable, natural conditions. Other fractions of the absorbing complex in the absence of catastrophic changes in physico-chemical conditions in the river ecosystem do not pass into an aqueous solution, and the redistribution of radionuclides associated with them can occur only with mechanical transfer of the matter.

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叶尼塞河底部沉积物中人工放射性核素(137cs、152eu、60co)的迁移(克拉斯诺亚尔斯克MCP影响区附近)

揭示了克拉斯诺亚尔斯克MCP影响区附近叶尼塞河底沉积物垂直柱中人工伽马辐射放射性核素（137Cs、152Eu、154Eu、155Eu、60Co）的分布性质。结果表明，海底沉积物的矿物组成不随深度变化，主要以石英、斜长石和钾长石为主，少量含角闪石、绿泥石、云母。结果表明，在海底沉积物中，交换态和碳酸盐态平均含有16%的152Eu、22%的137Cs和15%的60Co。以这些形式存在的放射性核素可以进入水溶液，并在稳定的自然条件下参与二次迁移。在河流生态系统的物理化学条件没有发生灾难性变化的情况下，吸收复合体的其他部分不会进入水溶液，与之相关的放射性核素的重新分布只能通过物质的机械转移来发生。

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来源期刊

Geology and Mineral Resources of Siberia Earth and Planetary Sciences-Geology

CiteScore

0.30

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0.00%

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