Journal of Siberian Federal University. Biology / Analysis of Extracellular Matter Associated with Water Moss as a Monitor of Radionuclide (40K and 137Cs) Transfer in the Yenisei River (Siberia, Russia)

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Issue
Journal of Siberian Federal University. Biology. 2025 18 (1)
Authors
Zotina, Tatiana A.; Sukhorukov, Vladislav V.; Alexandrova, Yuliyana V.; Karpov, Anton D.
Contact information
Zotina, Tatiana A.: Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; ; ORCID: 0000-0002-4792-1582; Sukhorukov, Vladislav V.: Siberian Federal University Krasnoyarsk, Russian Federation; ORCID: 0009-0000-7916-7513; Alexandrova, Yuliyana V.: Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; ORCID: 0000-0002-4274-963X; Karpov, Anton D.: All-Russian Research Institute for Silviculture and Mechanization of Forestry Pushkino, Russian Federation; ORCID: 0009-0005-9940-3671
Keywords
Fontinalis antipyretica; Fontinalis antipyretica; potassium‑40; esium‑137; suspended sediments; epiphytic diatoms
Abstract

Aquatic moss is widely used as a monitor of industrial pollution of surface watercourses because of its ability to accumulate high concentrations of xenobiotics in its biomass. In particular, moss is capable of capturing particulate suspended matter carried by the water flow and depositing it on the surface of leaves; therefore, extracellular particles associated with aquatic moss can be considered as a potential monitor for studying particulate matter transfer in a watercourse. In this work, we studied the amount and composition of extracellular particles associated with the biomass of aquatic moss Fontinalis antipyretica of the Yenisei River (Siberia, Russia) and the quantitative distribution of radionuclides (40K and 137Cs) between extracellular matter and aquatic moss biomass. Samples of aquatic moss and bottom sediments were collected at two sites of the Yenisei River downstream of the point where controlled releases of liquid radioactive waste are performed, during 2020–2022. The contribution of extracellular matter to the dry mass of aquatic moss samples averaged 31.7 ± 9.1 % (n=5, ± SD). The extracellular particulate matter of aquatic moss contained significantly higher activity concentration (74–237 Bq/kg in “light” particles and 86–195 Bq/kg in “heavy” particles) and percentage (72.3 ± 10.5 %, n=5, ± SD) of artificial radionuclide 137Cs than in the biomass of aquatic moss (7.6–38.2 Bq/kg), which indicates the transfer of radiocesium in the water of the Yenisei mainly in association with suspended particles. In contrast to 137Cs, the percentage of natural radionuclide 40K in the extracellular matter of aquatic moss was significantly lower (34.9 ± 8.9 %, n=5, ± SD) than in the moss biomass, which indicates a difference in the physicochemical forms of isotopes of these analogous elements in the suspended matter of the Yenisei. At this stage of research, it was not possible to identify which components of suspended matter 137Cs is predominantly associated with. The results obtained allow us to conclude that the extracellular matter associated with aquatic moss is an informative tool for studying the transfer of 137Cs in the Yenisei River

Pages
82–97
EDN
TMACEY
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/155065

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