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Uranium Uptake and Accumulation in Plants on Soils

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  • 1Key Laboratory for Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology,Sichuan University, Chengdu 610064, China;

    2College of Chemistry, Sichuan University, Chengdu 610064, China;

    3PetrolChina Southwest Oil and Gas Field in Sichuan Gas Mine Company, Suining 629000, China;

    4School of Life Sciences,Sichuan University, Chengdu 610064, China;

    5China Academy of Engineering Physics, Mianyang 621900, China

Received date: 2010-10-20

  Revised date: 2011-03-08

  Online published: 2011-07-01

Abstract

With the development of the nuclear industry, heavy metal uranium (U) emissions and diffusion have led to U contamination of surface soils, which have had a great impact on society and the environment. How to remedy U-contaminated soils is a difficult problem. Phytoremediation is welcomed for cleanup because of its low cost, safety and environmental friendliness. Searching for accumulators for U is the key to this technology. We designed simulation experiments for soil contaminated with 100 mg·kg–1 U for first and second phytoremediation. The effects of phytoremediation were evaluated in terms of U concentration in shoots and roots of plants, U export, bioaccumulation factors (BFS) and translocation factors (TFS). The first phytoremediation indicated that BFS ([U]plants/[U]soils) and TFS ([U]shoots/[U]roots) of Lactuca dolichophylla are more than 3, and U concentration in shoots reached 1.67×103 mg·kg–1. The second phytoremediation showed that the U concentration of Chlorophytum comosum, Phaseolus vulgaris, Artemisia lavandulaefolia but not Ophiopogon japonicus decreased by 4- to 8-fold. Amendments with seaweed fertilizer and citric acid could help remediate U-contaminated soil. The available U for the second phytoremediation on soil was decreased, which made the second phytoremediation more difficult.

Cite this article

Qinfang Wan, Yahong Chen, Bin Hu, Yamin Ren, Liang Wang, Honghui Lin, Dachao Deng, Yun Bai, Chuanqin Xia . Uranium Uptake and Accumulation in Plants on Soils[J]. Chinese Bulletin of Botany, 2011 , 46(4) : 425 -436 . DOI: 10.3724/SP.J.1259.2011.00425

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