Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46503 10.2205/2019ES000681 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Radionuclide distribution in components of the Sarbalyk limnetic system (Baraba lowland, Western Siberia) Radionuclide distribution in components of the Sarbalyk limnetic system (Baraba lowland, Western Siberia) Ovdina Ekaterina A Ovdina Ekaterina A ovdina@igm.nsc.ru Strakhovenko Vera D Strakhovenko Vera D Yermolaeva Nadezhda I Yermolaeva Nadezhda I Zarubina Evgeniya Yu Zarubina Evgeniya Yu Yermolov Yurij V Yermolov Yurij V Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences ru Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences ru Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences ru Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences ru Institute for Water and Environmental Problems, Siberian Branch of the Russian Academy of Sciences ru Institute for Water and Environmental Problems, Siberian Branch of the Russian Academy of Sciences ru Institute for Water and Environmental Problems, Siberian Branch of the Russian Academy of Sciences ru Institute for Water and Environmental Problems, Siberian Branch of the Russian Academy of Sciences ru Institute of Soil Science and Agrochemistry, Siberian Branch of the Russian Academy of Sciences ru Institute of Soil Science and Agrochemistry, Siberian Branch of the Russian Academy of Sciences ru 19 6 29 10 2021 https://www.rjes.ru/en/nauka/article/46503/view

Geochemical and mineralogical analysis of the bottom sediment cores of small lakes can be used as the basis for radio-ecological monitoring and environmental protection measures. Here, features of the radionuclide activity distribution in components of the limnetic ecosystems of the central Baraba lowland were studied, and factors affecting radiocesium absence in the bottom sediment of Lake Sarbalyk were identified. Fieldwork included the sampling of limnetic ecosystem components, bottom sediment weighing, and the determination of pH, Eh, TDS and oxygen content. Subsequent laboratory investigation involved the determination of major and trace element concentrations by atomic absorption spectrometry and X-ray fluorescence analysis; mineral composition by X-ray diffractometry (XRD); analysis of sample morphology and composition via scanning electron microscopy; and natural radionuclide and radiocesium content determination by the gamma-spectrometric method. Radiocesium is present in all the studied lake bottom sediments of the central Baraba lowland in the upper horizons, with the exception of Lake Sarbalyk. Limnetic ecosystem components were analyzed using modern analytical methods, considering the distribution features of natural and artificial radionuclides in catchment area soils, tussocks and the bottom sediment of Lake Sarbalyk. The results revealed that the absence of radiocesium in the bottom sediment of Lake Sarbalyk is due to two factors: the characteristics of the lake overgrowth and the sorption of dissolved forms of 137" role="presentation" style="position: relative;">137137^{137}Cs.

Geochemical and mineralogical analysis of the bottom sediment cores of small lakes can be used as the basis for radio-ecological monitoring and environmental protection measures. Here, features of the radionuclide activity distribution in components of the limnetic ecosystems of the central Baraba lowland were studied, and factors affecting radiocesium absence in the bottom sediment of Lake Sarbalyk were identified. Fieldwork included the sampling of limnetic ecosystem components, bottom sediment weighing, and the determination of pH, Eh, TDS and oxygen content. Subsequent laboratory investigation involved the determination of major and trace element concentrations by atomic absorption spectrometry and X-ray fluorescence analysis; mineral composition by X-ray diffractometry (XRD); analysis of sample morphology and composition via scanning electron microscopy; and natural radionuclide and radiocesium content determination by the gamma-spectrometric method. Radiocesium is present in all the studied lake bottom sediments of the central Baraba lowland in the upper horizons, with the exception of Lake Sarbalyk. Limnetic ecosystem components were analyzed using modern analytical methods, considering the distribution features of natural and artificial radionuclides in catchment area soils, tussocks and the bottom sediment of Lake Sarbalyk. The results revealed that the absence of radiocesium in the bottom sediment of Lake Sarbalyk is due to two factors: the characteristics of the lake overgrowth and the sorption of dissolved forms of 137" role="presentation" style="position: relative;">137137^{137}Cs.

 Radiogenic isotope geochemistry small lake Western Siberia Radiogenic isotope geochemistry small lake Western Siberia Work is done on state assignment of IGM SB RAS and has been supported by Ministry of Science and Higher Education of the Russian Federation and the Russian Foundation for Basic Research (RFBR) [grant number 18-45-540002 p_a].

Bejrom, S. G., I. P. Vasil'ev, I. M. Gadzhiev (1986) , Prirodnye Resursy Novosibirskoj Oblasti, 215 pp., Nauka, Novosibirsk, USSR (in Russian). Bejrom, S. G., I. P. Vasil'ev, I. M. Gadzhiev (1986) , Prirodnye Resursy Novosibirskoj Oblasti, 215 pp., Nauka, Novosibirsk, USSR (in Russian). Bihari, A., et al. (2018) , Fallout isotope chronology of the near-surface sediment record of Lake Bolatau, Journal of Environmental Radioactivity, 181, p. 32-41, https://doi.org/10.1016/j.jenvrad.2017.10.009. Bihari, A., et al. (2018) , Fallout isotope chronology of the near-surface sediment record of Lake Bolatau, Journal of Environmental Radioactivity, 181, p. 32-41, https://doi.org/10.1016/j.jenvrad.2017.10.009. Egorov, V. N., et al. (2018) , Rating Water Quality in Sevastopol Bay by the Fluxes of Pollutant Deposition in Bottom Sediments, Water Resources, 45, no. 2, p. 222-230, https://doi.org/10.1134/S0097807818020069. Egorov, V. N., et al. (2018) , Rating Water Quality in Sevastopol Bay by the Fluxes of Pollutant Deposition in Bottom Sediments, Water Resources, 45, no. 2, p. 222-230, https://doi.org/10.1134/S0097807818020069. Il'in, V. B., A. I. Syso (2001) , Pochvenno-geokhimicheskie provintsii v Ob'-Irtyshskom mezhdurech'e: prichiny i sledstviya, Sibirskii Ekologicheskii Zhurnal, 2, p. 111-118 (in Russian). Il'in, V. B., A. I. Syso (2001) , Pochvenno-geokhimicheskie provintsii v Ob'-Irtyshskom mezhdurech'e: prichiny i sledstviya, Sibirskii Ekologicheskii Zhurnal, 2, p. 111-118 (in Russian). Korde, N. V. (1969) , Biostratigrafiya i Tipologiya Russkikh Sapropelej, 219 pp., Izd-vo AN SSSR, Moscow, USSR (in Russian). Korde, N. V. (1969) , Biostratigrafiya i Tipologiya Russkikh Sapropelej, 219 pp., Izd-vo AN SSSR, Moscow, USSR (in Russian). Lan, B., D. Zhang, Y. Yang (2018) , Lacustrine sediment chronology defined by 137Cs, 210Pb and 14C and the hydrological evolution of Lake Ailike during 1901-2013, northern Xinjiang, China, Catena, 161, p. 104-112, https://doi.org/10.1016/j.catena.2017.10.020. Lan, B., D. Zhang, Y. Yang (2018) , Lacustrine sediment chronology defined by 137Cs, 210Pb and 14C and the hydrological evolution of Lake Ailike during 1901-2013, northern Xinjiang, China, Catena, 161, p. 104-112, https://doi.org/10.1016/j.catena.2017.10.020. Lopotko, M. Z. (1978) , Ozera i Sapropel', 88 pp., Nauka i Tehnika, Minsk, USSR (in Russian). Lopotko, M. Z. (1978) , Ozera i Sapropel', 88 pp., Nauka i Tehnika, Minsk, USSR (in Russian). Malikova, I. N., V. D. Strakhovenko, et al. (2005) , Ekologicheskoe sostojanie pochv Altajskogo kraja: zagrjaznenie radioceziem, Sibirskii Ekologicheskii Zhurnal, 12, no. 6, p. 985-998 (in Russian). Malikova, I. N., V. D. Strakhovenko, et al. (2005) , Ekologicheskoe sostojanie pochv Altajskogo kraja: zagrjaznenie radioceziem, Sibirskii Ekologicheskii Zhurnal, 12, no. 6, p. 985-998 (in Russian). Naumova, N. B., et al. (2013) , Donnye otlozheniya stepnykh ozer: zabytye ehkosistemy?, Razvitie Mineral'no-Syr'evoj Bazy Sibiri, p. 276-279, Tomskij Politehnicheskij Universitet, Tomsk (in Russian). Naumova, N. B., et al. (2013) , Donnye otlozheniya stepnykh ozer: zabytye ehkosistemy?, Razvitie Mineral'no-Syr'evoj Bazy Sibiri, p. 276-279, Tomskij Politehnicheskij Universitet, Tomsk (in Russian). Ovdina, E. A., et al. (2016) , Osobennosti raspredeleniya radionuklidov v oz. Sarbalyk (Barabinskaya ravnina), Materialy V Mezhdunarodnoi konferentsii Radioaktivnost' i radioaktivnye elementy v srede obitaniya cheloveka, p. 475-477, STT, Tomsk (in Russian). Ovdina, E. A., et al. (2016) , Osobennosti raspredeleniya radionuklidov v oz. Sarbalyk (Barabinskaya ravnina), Materialy V Mezhdunarodnoi konferentsii Radioaktivnost' i radioaktivnye elementy v srede obitaniya cheloveka, p. 475-477, STT, Tomsk (in Russian). Pestryakova, L. A. (2016) , Paleoehkologiya. Metodologicheskie Osnovy Paleoehkologii: Uchebno-Metodicheskoe Posobie, 84 pp., Izd-vo NEFU, Yakutsk, Russia (in Russian). Pestryakova, L. A. (2016) , Paleoehkologiya. Metodologicheskie Osnovy Paleoehkologii: Uchebno-Metodicheskoe Posobie, 84 pp., Izd-vo NEFU, Yakutsk, Russia (in Russian). Rikhvanov, L. P. (2009) , Radioaktivnye Ehlementy v Okruzhayushhej Srede i Problemy Radioehkologii: Uchebnoe Posobie, 430 pp., STT, Tomsk, Russia (in Russian). Rikhvanov, L. P. (2009) , Radioaktivnye Ehlementy v Okruzhayushhej Srede i Problemy Radioehkologii: Uchebnoe Posobie, 430 pp., STT, Tomsk, Russia (in Russian). Roslyakov, N. A., V. D. Strakhovenko, A. I. Syso (2013) , Mestorozhdeniya sapropelevykh zalezhej Novosibirskoj oblasti, Razvitie Mineral'no-Syr'evoj Bazy Sibiri, p. 273-276, Tomskij Politehnicheskij Universitet, Tomsk (in Russian). Roslyakov, N. A., V. D. Strakhovenko, A. I. Syso (2013) , Mestorozhdeniya sapropelevykh zalezhej Novosibirskoj oblasti, Razvitie Mineral'no-Syr'evoj Bazy Sibiri, p. 273-276, Tomskij Politehnicheskij Universitet, Tomsk (in Russian). Shtin, S. M. (2005) , Ozernye Sapropeli i Osnovy ikh Kompleksnogo Osvoeniya, 373 pp., MISIS, Moscow, Russia (in Russian). Shtin, S. M. (2005) , Ozernye Sapropeli i Osnovy ikh Kompleksnogo Osvoeniya, 373 pp., MISIS, Moscow, Russia (in Russian). Solotchina, E. P. (2009) , Strukturnyj Tipomorfizm Glinistykh Mineralov Osadochnykh Razrezov i Kor Vyvetrivaniya, 236 pp., Geo, Novosibirsk, Russia (in Russian). Solotchina, E. P. (2009) , Strukturnyj Tipomorfizm Glinistykh Mineralov Osadochnykh Razrezov i Kor Vyvetrivaniya, 236 pp., Geo, Novosibirsk, Russia (in Russian). Strakhovenko, V. D., et al. (2016) , Hydrochemical characteristic of sapropels in Novosibirsk Oblast, Water Resources, 43, no. 3, p. 336-344, https://doi.org/10.1134/S0097807816030167. Strakhovenko, V. D., et al. (2016) , Hydrochemical characteristic of sapropels in Novosibirsk Oblast, Water Resources, 43, no. 3, p. 336-344, https://doi.org/10.1134/S0097807816030167. Strakhovenko, V. D., et al. (2010) , The regularities of distribution of radionuclides and rare-earth elements in bottom sediments of Siberian lakes, Russian Geology and Geophysics, 51, no. 11, p. 1167-1178, https://doi.org/10.1016/j.rgg.2010.10.002. Strakhovenko, V. D., et al. (2010) , The regularities of distribution of radionuclides and rare-earth elements in bottom sediments of Siberian lakes, Russian Geology and Geophysics, 51, no. 11, p. 1167-1178, https://doi.org/10.1016/j.rgg.2010.10.002. Subetto, D. A., M. Ya. Prytkova (2016) , Donnye Otlozheniya Raznotipnykh Vodoemov. Metody Izucheniya, 89 pp., KarSC RAS, Petrozavodsk (in Russian). Subetto, D. A., M. Ya. Prytkova (2016) , Donnye Otlozheniya Raznotipnykh Vodoemov. Metody Izucheniya, 89 pp., KarSC RAS, Petrozavodsk (in Russian). Sukachyov, V. N. (1943) , Sapropel' i Ego Znachenie v Sel'skom Khozyajstve, 54 pp., Izd-vo AN USSR, Moscow, USSR (in Russian). Sukachyov, V. N. (1943) , Sapropel' i Ego Znachenie v Sel'skom Khozyajstve, 54 pp., Izd-vo AN USSR, Moscow, USSR (in Russian). Wang, J., M. Baskaran, J. Niedermiller (2018) , Mobility of Cs-137 in freshwater lakes: A mass balance and diffusion study of Lake St. Clair, Southeast Michigan, USA, Geochimica et Cosmochimica Acta, 218, p. 323-342, https://doi.org/10.1016/j.gca.2017.09.017. Wang, J., M. Baskaran, J. Niedermiller (2018) , Mobility of Cs-137 in freshwater lakes: A mass balance and diffusion study of Lake St. Clair, Southeast Michigan, USA, Geochimica et Cosmochimica Acta, 218, p. 323-342, https://doi.org/10.1016/j.gca.2017.09.017. Yermolaeva, N. I., et al. (2016) , Hydrobiological Conditions of Sapropel Formation in Lakes in the South of Western Siberia, Water Resources, 43, no. 1, p. 79-91, https://doi.org/10.1134/S0097807816010073. Yermolaeva, N. I., et al. (2016) , Hydrobiological Conditions of Sapropel Formation in Lakes in the South of Western Siberia, Water Resources, 43, no. 1, p. 79-91, https://doi.org/10.1134/S0097807816010073. Zarubina, E. Yu. (2013) , Pervichnaya produktsiya makrofitov trekh raznotipnykh sapropelevykh ozer yuga Zapadnoj Sibiri (v predelakh Novosibirskoj oblasti) v 2012 godu, Mir Nauki, Kul'tury, Obrazovaniya, 5, p. 441-444 (in Russian). Zarubina, E. Yu. (2013) , Pervichnaya produktsiya makrofitov trekh raznotipnykh sapropelevykh ozer yuga Zapadnoj Sibiri (v predelakh Novosibirskoj oblasti) v 2012 godu, Mir Nauki, Kul'tury, Obrazovaniya, 5, p. 441-444 (in Russian). Zhang, Y. Q., Y. Long, B. Li, S. J. Xu, X. L. Wang, J. Liao (2018) , Use of reservoir deposits to reconstruct the recent changes in sediment yields from a small granite catchment in the Yimeng Mountain region, China, Geomorphology, 293, p. 167-177, https://doi.org/10.1016/j.geomorph.2017.05.017. Zhang, Y. Q., Y. Long, B. Li, S. J. Xu, X. L. Wang, J. Liao (2018) , Use of reservoir deposits to reconstruct the recent changes in sediment yields from a small granite catchment in the Yimeng Mountain region, China, Geomorphology, 293, p. 167-177, https://doi.org/10.1016/j.geomorph.2017.05.017.