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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zotina, Tatiana, Dementyev, Dmitry, Alexandrova, Yuliyana
Заглавие : Long-term trends and speciation of artificial radionuclides in two submerged macrophytes of the Yenisei River: A comparative study of Potamogeton lucens and Fontinalis antipyretica
Колич.характеристики :15 с
Коллективы : Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Krasnoyarsk Regional Scientific Foundation [18-44-240003]
Место публикации : J. Environ. Radioact.: ELSEVIER SCI LTD, 2021. - Vol. 227. - Ст.106461. - ISSN 0265-931X, DOI 10.1016/j.jenvrad.2020.106461. - ISSN 1879-1700(eISSN)
Примечания : Cited References:37. - The authors are grateful to the staff of the Radioecology Laboratory and the head of the Laboratory, Dr. Alexander Bolsunovsky, to the staff of Analytical Laboratory (Institute of Biophysics SB RAS) for their help in sample collection and measurement 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 partly (in 2018-2020) by the grant of Russian Foundation for Basic Research and Krasnoyarsk Regional Scientific Foundation No.18-44-240003.
Предметные рубрики: HEAVY-METALS
BRYOPHYTES
CONTAMINATION
BIOMASS
PLANTS
CS-137
TOOL
Аннотация: Long-term trends of artificial radionuclides, from 2003 to 2018, in two abundant species of macrophytes, shining pondweed, Potamogeton lucens, and water moss, Fontinalis antipyretica, have been analyzed to estimate the indicative reliability of these two species as biomonitors of radioactive contamination in a river system and to quantify the decrease in the content of artificial radionuclides in the Yenisei River. Time-dependent trends of artificial radionuclides in the biomass of these species were similar, resulting in estimates of effective half-lives for Mn-54, Co-58, Co-60, Zn-65, Cs-137, and Eu-152 similar for both species. Concentrations of artificial radionuclides in biomass of shining pondweed and water moss correlated with annual discharges of the radionuclides to the Yenisei at different levels of significance, and the strongest (R-2 0.7) positive correlation (p 0.05) was obtained for Co-60, Zn-65, and Eu-152. Concentrations of Co-60, Cs-137, and Eu-152 in water moss were 2-7.5 times higher than in shining pondweed, and considerable percentages of those isotopes were recorded in extracellular particulate matter, which was largely represented by epiphytic diatoms. Higher concentrations of artificial radionuclides in the biomass of water moss can be considered as an advantage of water moss as a monitor of radioactive contamination of the Yenisei, while shining pondweed is more useful for estimation of annual deposits of radionuclides in vegetation of the Yenisei and spatial transfer of radionuclides downstream of the discharge site. Despite differences in concentrations of artificial radionuclides, both species can be considered as reliable indicators of radioactive contamination of the river on a long-term scale.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Dementyev, Dmitry, Bolsunovsky, Alexander
Заглавие : A long-term study of radionuclide concentrations in mushrooms in the 30-km zone around the Mining-and-Chemical Combine (Russia)
Колич.характеристики :10 с
Место публикации : Isot. Environ. Health Stud.: TAYLOR & FRANCIS LTD. - ISSN 1025-6016, DOI 10.1080/10256016.2020.1718124. - ISSN 1477-2639(eISSN)
Примечания : Cited References:25
Предметные рубрики: CS-137
FOREST
RADIOCESIUM
FUNGI
ACCUMULATION
ACCIDENT
Аннотация: Cs-137 concentrations were measured in mushrooms in an area affected by radioactive discharges of the Mining-and-Chemical Combine (MCC) (Rosatom, Russia) in 2002-2017. The sources of radionuclides in the study sites were global fallouts and waterborne and airborne radioactive discharges of the MCC. The mushroom species Suillus granulatus and S. luteus showed the highest Cs-137 concentrations (140-7100 Bq kg(-1)) for this area. Over the entire monitoring period, no significant change in Cs-137 concentration was observed in the Suillus spp. samples collected from the sites with the aerial deposition of radionuclides. In the floodplain site with the radionuclide deposition from water and air, a significant decrease in the average Cs-137 concentration was observed in the period between 2004 and 2017: a three-fold decrease in Suillus spp. and a nine-fold decrease in Lactarius deliciosus. The effective half-lives of Cs-137 in fruiting bodies of the mushrooms L. deliciosus and Suillus spp. in this site were 3.6 +/- 0.6 and 9.2 +/- 2.7 years, respectively.
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