The anthropogenic fallout radionuclides in soils of Mount Khuko (the Western Caucasus) and their application for determination of sediment redistribution

Ivanov, M.M.; Kuzmenkova, N.V.; Rozhkova, A.K.; Grabenko, E.A.; Grachev, A.M.; Golosov, V.N.

Авторы: Ivanov Maksim M., Kuzmenkova Natalia V., Rozhkova Alexandra K., Grabenko Evgeniy A., Grachev Alexei M., Golosov Valentin N.
Журнал: Journal of Environmental Radioactivity
Том: 248
Год издания: 2022
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 106880
DOI: 10.1016/j.jenvrad.2022.106880
Аннотация: The purposes of this study are to determine the content and origin of anthropogenic fallout radionuclides (FRN) in soils of Mount Khuko, located in the western sector of the Caucasus Mountains and to assess the possibility to use them for evaluation of sediment redistribution for the alpine grasslands,.The field study was carried out in August 2019 near the top of Mount Khuko, located in the western part of the main Caucasus Mountain Ridge. Integral and incremental soil samples were collected from the different morphological units of the studied area. The content of 137Cs and 241Am in soil samples was evaluated using laboratory gamma-spectrometry. A part of samples was selected for Pu isotopes extraction and then alpha- spectrometric analysis. 137It was established that the Cs contamination of soils in the studied area has at least two sources of origin. The first source is the 137Cs bomb-derived fallout after the bomb tests in 1950–60th, which is widespread across the globe. The second source is 137Cs Chernobyl-derived fallout High random variability (Cv = 25–42%) was found within reference sites, located at the undisturbed areas on the local flat interfluves due to high variability of soil characteristics (grain size, density, organic matter content etc.). However minimum spatial variability (range 12,2–14,3 kBq/m2) was identified for the mean value of 137Cs inventories for all 5 reference sites located in the different parts of the studied area. It is difficult to separate individual peaks of the bomb-derived and Chernobyl-derived 137Cs falloutin sediment sinks with low sedimentation rates.Journal of Environmental Radioactivity 248 (2022) 106880 Contents lists available at ScienceDirectJournal of Environmental Radioactivity journal homepage: www.elsevier.com/locate/jenvrad The anthropogenic fallout radionuclides in soils of Mount Khuko (the Western Caucasus) and their application for determination of sediment redistributionMaksim M. Ivanova,b,*, Natalia V. Kuzmenkovaa,c, Alexandra K. Rozhkovac, Evgeniy A. Grabenko a, Alexei M. Grachev a, Valentin N. Golosov a, ba Institute of Geography RAS, Russiab Faculty of Geography, Lomonosov Moscow State University, Russia c Faculty of Chemistry, Lomonosov Moscow State University, Russia Application 239,240Pu as an additional chronological marker allows to identify the origin of above mention peaks in the soils of alpine grasslands and of dry lake bottom.
Добавил в систему: Иванов Максим Михайлович

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