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полный	информационный	краткий

Поисковый запрос: (<.>S=PU-240/PU-239 ATOM RATIO<.>)

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A comparative study of biota and sediments as monitors of plutonium in the Yenisei River (Siberia, Russia) / T. A. Zotina, M. S. Melgunov, D. V. Dementyev [et al.] // J. Environ. Radioact. - 2021. - Vol. 237. - Ст. 106723, DOI 10.1016/j.jenvrad.2021.106723. - Cited References:50. - The authors are grateful to the staff of the Radioecology Laboratory (Institute of Biophysics SB RAS, Krasnoyarsk) and the head of the Laboratory, Dr. Alexander Bolsunovsky, for their help in sample collection and processing, to Irina Makarova (Institute of Geology and Mineralogy SB RAS, Novosibirsk) for radiochemical separation of plutonium, and to Elena Krasova for linguistic check and improvements. We also appreciate comments of anonymous reviewers, which allowed us to improve our manuscript. The research was supported by the grants of Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory, and Krasnoyarsk Regional Scientific Foundation No. 20-44-240004 and 18-44-240003, and the State Assignment for Fundamental Research to IBP SB RAS and IGM SB RAS. . - ISSN 0265-931X. - ISSN 1879-1700

РУБ Environmental Sciences
Рубрики:
PU-240/PU-239 ATOM RATIO
ARTIFICIAL RADIONUCLIDES
WATER
Кл.слова (ненормированные):
Americium -- Cesium -- Submerged macrophyte -- Zoobenthos
Аннотация: MOX-fuel production and spent nuclear fuel reprocessing started recently at the Mining-and-Chemical Combine (MCC, Zheleznogorsk, Russia) have caused an increase in controlled releases of plutonium to the Yenisei River. In this study, we analyzed time-dependent trends of plutonium (239,240Pu and 238Pu) in biota and bottom sediments of the Yenisei during 2008-2019, to estimate comparatively the potential of abundant representatives of biota as bio-monitors of contamination of the Yenisei by plutonium. Gamma-emitting radionuclides (40 K; 60Co; 137Cs; 152Eu; 241Am) were measured in environmental samples of the Yenisei as well. Samples of bottom sediments, water moss (Fontinalis antipyretica), shining pondweed (Potamogeton lucens), caddisfly larvae with casings (Apatania crymophila), and amphipods (Eulimnogammarus viridis and Palaseopsis cancelloides) were collected downstream and upstream of the radioactive discharge site. Environmental samples of the Yenisei collected downstream of the radioactive discharge site differed considerably in activity concentrations of plutonium but were similar in time-dependent trends of plutonium, reflecting the trends of annual discharges of plutonium. In 2018, the year of a sharp increase in controlled discharge of plutonium, the concentration of 239,240Pu in water moss (26 Bq kg-1 d.w.) was higher than in sediments (14 Bq kg-1 d.w.). In other years, the highest activity concentration of 2391,240Pu was observed in bottom sediments. In view of the higher magnitude of increase in plutonium concentration, water moss and shining pondweed can be considered as more sensitive indicators of increased fresh releases of plutonium than bottom sediments. Taking into account the food-related mechanism of plutonium uptake by amphipods, this representative of biota can be regarded as a sensitive monitor of bioavailable plutonium in the Yenisei.

WOS
Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Inst Biophys,Fed Res Ctr, 50-50 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, 79 Svobodny Av, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Inst Geol & Mineral, 3 Academician Koptyug Av, Novosibirsk 630090, Russia.

Доп.точки доступа:
Zotina, Tatiana A.; Melgunov, Michail S.; Dementyev, D. V.; Miroshnichenko, L. V.; Alexandrova, Y. V.; Russian Foundation for Basic Research, Government of the Krasnoyarsk Territory; Krasnoyarsk Regional Scientific Foundation [20-44-240004, 18-44-240003]; State Assignment for Fundamental Research

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