Biomonitoring of environmental pollution by thorium and uranium in selected regions of the Republic of Kazakhstan.

Abstract:

:Two former uranium mines and a uranium reprocessing factory in the city of Aktau, Kazakhstan, may represent a risk of contaminating the surrounding areas by uranium and its daughter elements. One of the possible fingerprinting tools for studying the environmental contamination is using plant samples, collected in the surroundings of this city in 2007 and 2008. The distribution pattern of environmental pollution by uranium and thorium was evaluated by determining the thorium and uranium concentrations in plant samples (Artemisia austriaca) from the city of Aktau and comparing these results with those obtained for the same species of plants from an unpolluted area (town of Kurchatov). The determination of the uranium and thorium concentrations in different parts of A. austriaca plants collected from the analyzed areas demonstrated that the main contamination of the flora in areas surrounding the city of Aktau was due to dust transported by the wind from the uranium mines. The results obtained demonstrate that all the areas surrounding Aktau have a higher pollution level due to thorium and uranium than the control area (Kurchatov). A few "hot points" with high concentrations of uranium and thorium were found near the uranium reprocessing factory and the uranium mines.

journal_name

J Environ Radioact

authors

Zoriy P,Ostapczuk P,Dederichs H,Höbig J,Lennartz R,Zoriy M

doi

10.1016/j.jenvrad.2010.02.014

subject

Has Abstract

pub_date

2010-05-01 00:00:00

pages

414-20

issue

5

eissn

0265-931X

issn

1879-1700

pii

S0265-931X(10)00044-5

journal_volume

101

pub_type

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