生态环境学报Issue(6)：1042-1045,4.
稀土尾矿区土壤重金属污染与优势植物累积特征
Heavy metal contamination of soil and concentration of dominant plants in rare earth mine tailing area
摘要
Abstract
The mining wastelands not only occupied vast land but also seriously polluted near environment. Therefore, ecological restoration of mine wastelands is an urgent and important research topic. A survey of the soils and analysis of dominant plants in rare earth mine tailing in Xiache Town, Heping County, Guangdong Province were conducted. Three main dominant plants Digitaria sanguinalis, Vetiveria zizanioides and Cassia occidentalis were found. The content of three heavy metals (Mn, Pb and Zn) in soil and 3 species of plants grown in rare earth mine tailing soil was measured with atomic absorption spectrophotometry. And the biological accumulating coefficient (BAC) and biological transfer coefficient (BTC) of these plants to heavy metals were further calculated. The results revealed that all the average contents of the three heavy metals in the soils of the mining area exceeded the background value in Guangdong Province and nationwide soil, showing that the soil of the rare earth mine tailing was seriously polluted by Mn, Pb and Zn. BAC and BTC of the three plants to Pb was less than 1, so these plants were not Pb hyperaccumulator. BAC of Vetiveria zizanioides to Mn and Zn was 0.9 and 0.4, and BTC of V. zizanioides to Mn and Zn was 3.7 and 1.1, respectively. BAC and BTC of Digitaria sanguinalis and Cassia occidentalis to Mn and Zn were all higher than 1, Showing that Digitaria sanguinalis and Cassia occidentalis could be used as pioneer plants for phytoremediation in rare earth mine tailing area.关键词
稀土尾矿/重金属/植物修复Key words
rare earth mine tailing/heavy metal/phytoremediation分类
资源环境引用本文复制引用
刘胜洪,张雅君,杨妙贤,刘文,梁红..稀土尾矿区土壤重金属污染与优势植物累积特征[J].生态环境学报,2014,(6):1042-1045,4.基金项目
广东省科技计划项目（2012A030700005）；广东省产学研结合项目 （）
