Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

[Text] / T. T. Efremova [et al.] // Eurasian Soil Sci. - 2002. - Vol. 35, Is. 1. - P91-98. - Cited References: 22 . - 8. - ISSN 1064-2293РУБ Soil Science

Аннотация: The migration of Cs-137 into deep peat layers is mainly determined by long-term annual fluctuations in the ground-water level and depends considerably on the microrelief of the bog surface. Radiocesium was found to be retained selectively by humic and fulvic acids of the first (0.1 N NaOH-extractable) fraction. A close correlation of cesium retention with the ash content in peat was observed. The accumulation of Cs-137 in root-inhabited horizons is enhanced by soil biota. The level of contamination of oligotrophic peatbogs corresponds to the background cesium concentrations in mineral soils of Western Siberia.

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Держатели документа:
Russian Acad Sci, Siberian Div, Sukachev Inst Forestry, Krasnoyarsk 660036, Russia
Russian Acad Sci, Siberian Div, Joint Inst Geol Geophys & Mineral, Novosibirsk 630090, Russia

Доп.точки доступа:
Efremova, T.T.; Sukhorukov, F.V.; Efremov, S.P.; Budashkina, V.V.

/ A. I. Bolsunovskii [и др.] // Radiats Biol Radioecol. - 2007. - Vol. 47, Is. 1. - С. 63-73 . - ISSN 0869-8031
Аннотация: The study was devoted to investigation of the contents of radionuclides and of heavy metals and to evaluate the frequency of chromosomal aberrations in samples of Elodea canadensis, a submerged plant, collected in different parts of the Yenisei River. The samples were collected in the area subjected to radioactive impact of the Mining-and-Chemical Combine (MCC) at Zheleznogorsk and in the control area, upstream of the MCC. The investigations shown that elodea biomass in the area affected by MCC operation contained a long inventory of artificial radionuclides typical for the MCC discharges. The upstream of the MCC, in the control sampling area, the sediments and the elodea biomass contained only one artificial radionuclide--137Cs. Thus, the exposure doses to elodea shoots and roots upstream of the MCC are small (not more than 8 microGy/d) and the main contribution info the dose is made by natural radionuclides. At the MCC discharge site (the village of Atamanovo) and at the downstream of it, the total dose rate increases almost an order of magnitude, reaching its maximal values--72 microGy/d for elodea shoots and 58 microGy/d for its roots. Cytogenetic investigations of elodea roots shown that at the MCC discharge site (the village of Atamanovo) and at downstream of it the occurrence of chromosomal aberrations in ana-telophase and in metaphase cells of elodea was considerably higher than in the control area. It is highly probable that this simultaneous dramatic increase in the total exposure rate and the occurrence of chromosomal aberrations in elodea is associated with the radiation factor. It is suggested that elodea is affected not only by the radiation factor but also by the chemical factor--toxicity of heavy metals.

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Доп.точки доступа:
Bolsunovskii, A.I.; Muratova, E.N.; Sukovatyi, A.G.; Pimenov, A.V.; Sanzharaeva, E.A.; Zotina, T.A.; Sedel'nikova, T.S.; Pan'kov, E.V.; Kornilova, M.G.