Accumulation of 137Cs in puddle sediments within urban ecosystem.

Autor: Seleznev AA; Institute of Industrial Ecology, Ural Branch of Russian Academy of Sciences, 620219 Ekaterinburg, Russia. seleznev@ecko.uran.ru, Yarmoshenko IV, Ekidin AA
Jazyk: angličtina
Zdroj: Journal of environmental radioactivity [J Environ Radioact] 2010 Aug; Vol. 101 (8), pp. 643-6. Date of Electronic Publication: 2010 Apr 24.
DOI: 10.1016/j.jenvrad.2010.03.015
Abstrakt: The role of puddle sediments as a final depot of (137)Cs horizontal migration within the urban landscape is studied using the example of Ekaterinburg city, Russia. Radioactive contamination in the city appeared due to fallout after atmospheric testing of nuclear weapons and nuclear accidents. Contamination density of (137)Cs in the region was assessed from archive data to be about 5.1 kBq/m(2), of which the maximum activity concentration (<30 Bq/kg) is associated with the upper 15 cm soil layer. Results of the survey reported here indicate a mean (137)Cs activity concentration in puddle sediments of 80 Bq/kg, with a maximum value of 540 Bq/kg. It is estimated that horizontal migration has led to about a fourfold concentration of (137)Cs in puddle sediments.
(Copyright 2010 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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