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Predictive radioecological mathematical model of the Yenisei river / A. G. Degermendzhi, L. G. Kosolapova, V. M. Belolipetskij // Radiatsionnaya Biologiya. Radioekologiya. - 2002. - Vol. 42, Is. 4. - С. 433-439 . - ISSN 0869-8031
Кл.слова (ненормированные):
Cesium -- Contamination -- Mathematical models -- Phosphorus -- Radioisotopes -- River pollution -- Cesium 137 -- Phosphorus 32 -- Radioecology -- The Yenisei river -- Ecosystems -- Bacteria (microorganisms) -- fresh water -- article -- ecosystem -- pollutant -- Russian Federation -- theoretical model -- Ecosystem -- Fresh Water -- Models, Theoretical -- Radioactive Pollutants -- Russia
Аннотация: A one-dimensional mathematical model of the Yenisei river ecosystem including hydrological, ecosystem and radioecologicl blocks has been developed. The model was used to evaluate contribution of different processes (transfer by water masses, dilution, radioactive decay, bioaccumulation) into self-purification of the river water from a radiation pollution. The pollution density of ecosystem components (bacteria, phyto-, zooplankton, phyto-, zoobenthos, detritus) with 137Cs and 32P is calculated.

Scopus
Держатели документа:
Inst. of Biophysics, Siberian Branch, RAS, Akademgorodok, Krasnoyarsk, 660036, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Degermendzhi, A.G.; Kosolapova, L.G.; Belolipetskij, V.M.

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An estimate of the rate of 241Am release from the biomass of aquatic plants of the Enisei river / A. Y. Bolsunovskij, T. A. Zotina, L. G. Bondareva // Doklady Akademii Nauk. - 2003. - Vol. 392, Is. 4. - С. 560-563 . - ISSN 0869-5652
Кл.слова (ненормированные):
Americium -- Aquaculture -- Biomass -- Contamination -- Ecology -- Radioisotopes -- River pollution -- Am release rate -- Americium 241 -- Elodea canadensis -- Enisei river -- Fontinalis antipyretica -- Radioecology -- Biological radiation effects
Аннотация: In the lab experiments (2000-2003) the biomass of Elodea canadelis (water thyme) and Fontinalis antipyretica (water moss) plants was used. The plants were exposed in filtered Enisei water with radionuclide additive in the form of 241Am(NO3)3 solution. The activity (A) was measured with gamma-spectrometer ("Canberra", USA) with ultra-pure germanium detector. The main A release in aqueous medium is observed after long stabilization stage caused by the plant necrosis. Elodea plants in 127 days lost up to 65% of initial A, and moss biomass - 35% in 373 days.

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Держатели документа:
Inst. Biofiziki SO RAN, Krasnoyarsk, Russian Federation : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Bolsunovskij, A.Y.; Zotina, T.A.; Bondareva, L.G.

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Biomonitoring of radioactive contamination of the Yenisei River using aquatic plants / A. Bolsunovsky, D. Dementyev, E. Trofimova // J. Environ. Radioact. - 2020. - Vol. 211. - Ст. 106100, DOI 10.1016/j.jenvrad.2019.106100 . - ISSN 0265-931X
Кл.слова (ненормированные):
Aquatic plants -- Artificial radionuclides -- Elodea canadensis -- The dose rate -- The frequency of chromosomal aberrations -- The Yenisei river -- Aquatic ecosystems -- Plant shutdowns -- Radioactivity -- Radioisotopes -- Rivers -- Aquatic plants -- Artificial radionuclides -- Chromosomal aberration -- Dose rate -- Elodea canadensis -- Yenisei rivers -- River pollution -- Elodea canadensis -- Fontinalis antipyretica
Аннотация: The Yenisei River is contaminated by artificial radionuclides released by one of the Russian facilities producing weapons-grade plutonium (the Mining-and-Chemical Combine, MCC), which has been in operation for 60 years. The paper presents results of long-term monitoring of radionuclide concentrations in six aquatic plant species collected from the 1400 km Yenisei River stretch downstream of the city of Krasnoyarsk. Before the last MCC reactor was shut down (in 2010), up to 30 artificial radionuclides were detected in the plant biomass, and 2 and 5 years after the reactor shutdown, 11 and 3–5 radionuclides, respectively, were detected. The highest concentrations of radionuclides were recorded in Fontinalis antipyretica. The aquatic plant Elodea canadensis, which commonly occurs in the Yenisei River, was used in the cytogenetic study. High frequencies of chromosomal aberrations (up to 33%) were revealed in cells of Elodea canadensis roots from the Yenisei region affected by the MCC radioactive discharge, at dose rates of 45–72 ?Gy/d, while in the cells of the plant roots from the reference areas, the frequency of chromosomal aberrations was 5–7%, at dose rates below 2 ?Gy/d. The higher frequencies of chromosomal aberrations in Elodea canadensis collected from the parts of the River with increased concentrations of artificial radionuclides are associated with the radiation factor. The aquatic plant Elodea canadensis can be recommended as a bio-indicator for radioactively contaminated aquatic ecosystems. © 2019 Elsevier Ltd

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Держатели документа:
Radioecology Laboratory, Institute of Biophysics Siberian Branch of Russian Academy of Sciences, 50-50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Bolsunovsky, A.; Dementyev, D.; Trofimova, E.

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