Research of Environmental Sciences. 2010, (06) Core

Soil Radionuclide Contamination and Radionuclide Accumulation Characteristics of Competitive Plants in a Uranium Tailings Repository in South ChinaChinese Full Text

NIE Xiao-qin,DING De-xin,LI Guang-yue,GAO Bin,WU Yan-qiong,HU Nan, LIU Yu-longKey Discipline Laboratory for National Defense for Biotechnology,Uranium Mining and Hydrometallurgy,University of South China,Hengyang 421001,China

Abstract: Site sampling and inductively coupled plasma mass spectrometry analysis were used to determine the contents of U and Th in the rhizosphere soil and plant of 14 kinds of competitive plants which grow naturally in a uranium tailings repository.The resistances to the radionuclide and radionuclide accumulation capabilities of these plants were analyzed.The results showed that Paspalum distichum L.,Paspalum orbiculare Forst.,Juncellus serotinus（Rottb.） C.B.Clarke,Kyllinga brevifolia Rottb and Cyperus iria L.have some U and Th in their shoots,and Cibotium barometz（Linn.） J.Sm.has some U and Th in its roots.The bioconcentration factor of uranium in the shoot of Cyperus iria L.amounts to 6.04,while the bioconcentration factors of the other plant species are less than 1.Some plant species have transfer factors for U smaller than 1.Kyllinga brevifolia Rottb has a transfer factor of 2.56 for Th,while the other plants have transfer factors less than 0.50.The uptake of Cyperus iria L.to uranium is superior to the other families of plants;it is a potential hyperaccumulator for uranium.

Keywords：

radionuclide; contamination; phytoremediation; hyperaccumulator;

DOI：
10.13198/j.res.2010.06.56.niexq.009
Series：
Subject：
Classification Code：
X53;X173

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Soil Radionuclide Contamination and Radionuclide Accumulation Characteristics of Competitive Plants in a Uranium Tailings Repository in South ChinaChinese Full Text

NIE Xiao-qin,DING De-xin,LI Guang-yue,GAO Bin,WU Yan-qiong,HU Nan, LIU Yu-longKey Discipline Laboratory for National Defense for Biotechnology,Uranium Mining and Hydrometallurgy,University of South China,Hengyang 421001,China

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