1. New Data on Potential Mobility of Anthropogenic Radionuclides in Bottom Sediments of the Yenisei River.
- Author
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Bolsunovsky, A. Ya., Borisov, R. V., and Dementyev, D. V.
- Subjects
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CESIUM isotopes , *RADIOISOTOPES , *RIVER sediments , *NUCLEAR reactor shutdowns - Abstract
It has been shown that, after the shutdown of the nuclear reactor at the Rosatom Mining and Chemical Combine (MCC) in 2010, anthropogenic radionuclides (60Co, 137Cs, 152Eu, and 241Am) are still detected in the bottom sediments (BS) of the Yenisei River in the MCC-affected area. Data from a comparative analysis of the potential mobility of anthropogenic radionuclides in the Yenisei BS surface and lower layers long after the shutdown of the MCC nuclear reactor are presented for the first time. The mobility of radionuclides was estimated using the well-known procedure of sequential extraction of BS. For 60Co, an increase in potential mobility in the lower layers (which are earlier in time of formation) was shown compared to the upper ones for the first time. The radionuclide 137Cs retains high binding strength to mineral matter of BS (close to 100%) regardless of the time factor. The long-term preservation of the high potential mobility of the radionuclides 241Am and 152Eu in BS, as well as the increase in potential mobility of 60Co over time, for the first time makes it possible to consider these radionuclides as potentially bioavailable in the ecosystem of the Yenisei River. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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