Influence of Moisture Regime on the Redistribution of Radioactive Cesium and Strontium Isotopes in Alluvial Soils by Physico-Chemical Forms
- 作者: Nikitin A.N.1, Tagai S.A.2, Sokolik G.A.3, Papenia M.V.3, Koltsov I.A.3
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隶属关系:
- Institute of Microbiology of the National Academy of Sciences of Belarus
- Polesye State Radiation-Ecological Reserve
- Belarusian State University
- 期: 卷 64, 编号 5 (2024)
- 页面: 529–539
- 栏目: Radionuclide
- URL: https://journals.rcsi.science/0869-8031/article/view/273915
- DOI: https://doi.org/10.31857/S0869803124050089
- EDN: https://elibrary.ru/LNNCNZ
- ID: 273915
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详细
The transformation of the hydrological regime of floodplains due to climate change and anthropogenic impact on water redistribution processes within natural landscapes can significantly impact the bioavailability of long-lived radioactive isotopes of cesium and strontium. A laboratory experiment demonstrated that varying the moisture content of alluvial soil within 40–100% from its full water-holding capacity leads to the redistribution of ¹³⁷Cs and ⁹⁰Sr between different chemical forms. Soil saturation with water increases the proportion of water-soluble ¹³⁷Cs, while the proportion of water-soluble ⁹⁰Sr decreases. The ion-exchangeable form of ¹³⁷Cs remains unaffected by soil moisture. The behavior of the ion-exchangeable form of ⁹⁰Sr in response to changes in soil moisture is dependent on soil characteristics: a significant increase in the proportion of ⁹⁰Sr was observed in sod-gley soil developed on sandy alluvium as soil moisture increased; however, this phenomenon was not observed in sod-gleyed soil developed on loamy alluvium. The proportion of ¹³⁷Cs extracted by sodium tetraphenylborate increases when alluvial soils are saturated with water. Similarly, the mobile form of ⁹⁰Sr behaves in the same manner, but when soil moisture reaches 100% of its full water-holding capacity in sod-gley soil, a sharp decrease in the proportion of the mobile form of this radionuclide is observed. Overall, there is a trend towards increased proportions of bioavailable forms of ¹³⁷Cs and ⁹⁰Sr in alluvial soils with increased moisture content, although the pecularities and magnitude of this phenomenon depend on the specific soil characteristics.
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作者简介
Aleksander Nikitin
Institute of Microbiology of the National Academy of Sciences of Belarus
编辑信件的主要联系方式.
Email: nikitinale@gmail.com
ORCID iD: 0000-0002-1369-0093
白俄罗斯, Minsk
Svetlana Tagai
Polesye State Radiation-Ecological Reserve
Email: lanabuz@tut.by
ORCID iD: 0000-0001-8387-1095
白俄罗斯, Choiniki
Galina Sokolik
Belarusian State University
Email: sokolikga@mail.ru
白俄罗斯, Minsk
Maryna Papenia
Belarusian State University
Email: marine_p19@mail.ru
ORCID iD: 0000-0001-7059-9934
白俄罗斯, Minsk
Ilya Koltsov
Belarusian State University
Email: koltsovilya.me@mail.ru
白俄罗斯, Minsk
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