137Cs and 90Sr mobility in soils and transfer in soil-plant systems in the Novozybkov district affected by the Chernobyl accident / Korobova E., Ermakov A., Linnik V. // Applied Geochemistry. - 1998. - V. 13, l. 7. - P. 803-814.

ISSN:

08832927

Type:

Article

Abstract:

The Chernobyl radionuclides distribution and mobility in soils and uptake by plants have been studied in seminatural and agricultural moraine and in fluvioglacial landscapes typical for the areas of the Bryansk region affected by the accident. The major part of the Chernobyl 137Cs accumulated in the topsoil is insoluble in water, 40 to 93% of this radionuclide is strongly fixed by soil, while 70 to 90% of the 90Sr is present in water soluble, exchangeable and weak-acid soluble forms. Radionuclide vertical migration is most pronounced in local depressions with organic and gley soils in which both radionuclides are detected to the depth of 3040 cm. In woodlands, most of the 137Cs is still fixed in litter and the upper mineral soil layer. The concentration peak in litter has moved to the lower AOF layer. Concentration in topsoil leads to high radionuclide uptake by forest species with shallow root systems (bilberry, mushrooms, fern). Contaminated forest products may contribute considerably to the internal irradiation doses of the local population. On flood plain grasslands traditionally used by local populations for haycrops and grazing, radionuclides are more strongly fixed in soils with fine texture. Radioisotope uptake by plants decreases in the order: legumes > herbs > grasses. TranSfer to grasses in local depressions is usually higher compared with the dry levees. Observed exclusions are assumed to be due to comparatively low mobility of 137Cs and relatively high K content in soil. 137Cs accumulation in potato tubers grown on sandy soddy podzolic watershed soils mainly corresponds to its total amount in soils; uptake of 90Sr depends upon the percentage of its most mobile fraction. Pronounced relief is proved to cause different patterns in distribution and migration of radionuclides in soils and local food chains. The study showed it to be true for private farms situated in different landscape positions within the same settlement. The forest litter, topsoil and products, and flood plain pastures, especially localities in depressions are critical materials for the long-term radioecological monitoring of the contaminated landscapes of the study area and those of similar conditions. Population of the areas within the zone of contamination exceeding 15 Ci/km2 (555 kBq/m2) should be recommended to exclude local forest products from their diets and to avoid cattle grazing on wet flood plain meadows without remediation.

Author keywords:

Index keywords:

biological uptake; Chernobyl accident; radionuclide migration

DOI:

10.1016/S0883-2927(98)00021-3

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032170746&doi=10.1016%2fS0883-2927%2898%2900021-3&partnerID=40&md5=285d2a8cffc70edd87954edc40727f91

Соавторы в МНС:

—

Другие поля

Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032170746&doi=10.1016%2fS0883-2927%2898%2900021-3&partnerID=40&md5=285d2a8cffc70edd87954edc40727f91
Affiliations	Vernadsky Inst. of Geochem. and A., Russian Academy of Sciences, ul.Kosygina 19, Moscow 117975, Russian Federation; Russ. Sci.-Pract. and E., Varshvskoje shosse, 46, Moscow 115230, Russian Federation
References	Grebenshchikova, N.V., Firsakova, S.K., Novik, A.A., Timofeev, S.S., Palekshanova, G.I., Samuseva, N.I., Levkova, I.A., Investigations of radiocaesium behaviour in soil-vegetation cover of Belorussia Polesje after the accident at the Chernobyl NPP (1992) Agrokhimia, 1, pp. 91-99; Korobova, E.M., Korovaikov, P.A., Landscape and geochemical approach to a study of soil distribution profile for Chernobyl radionuclides in distant areas (1991) Proc. of the Seminar on Comparative Assessment of the Environment Impact of Radionuclides Released During Three Major Nuclear Accidents: Kyshtym, Windscale, Chernobyl, pp. 309-326. , Luxemburg 1-5 October; Korobova, E.M., Linnik, V.G., Geochemical landscape strategy in monitoring the areas contaminated by the Chernobyl radionuclides (1993) Landscape and Urban Planning, 27, pp. 91-96; Pavlotskaya, F.I., (1974) Migration of the Global Fall-outs Radioactive Products in Soils, p. 215. , Atomizdat, Moscow; (1991) Recommendations for Agricultural Practice in Conditions of Contamination as a Result of the Chernobyl Accident for the 1991-1995 Years Period, p. 57. , State Commission of the Council of Ministers of the USSR for food stuffs and bulk purchase Moscow; Tyuryukanova, E.B., (1976) 90Sr Radioecology in Soils (Landscape-geochemical Aspects), p. 129. , Atomizdat, Moscow (in Russian)
Correspondence Address	Linnik, V.; Russian Scientific-Practical, Expert-Analytical Centre, Varshvskoje shosse 46, Moscow 115230, Russian Federation
CODEN	APPGE
Language of Original Document	English
Abbreviated Source Title	Appl. Geochem.
Source	Scopus