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太湖表层沉积物中重金属形态分布及其潜在生态风险分析
引用本文:陈春霄,姜霞,战玉柱,金相灿,赵铮.太湖表层沉积物中重金属形态分布及其潜在生态风险分析[J].中国环境科学,2011,31(11):1842-1848.
作者姓名:陈春霄  姜霞  战玉柱  金相灿  赵铮
作者单位:1. 北京师范大学,北京100875;中国环境科学研究院,北京100012
2. 中国环境科学研究院,北京,100012
3. 中国环境科学研究院,北京100012;山东科技大学化学与环境工程学院,山东青岛266510
4. 中国环境科学研究院,北京100012;贵州大学资源与环境工程学院,贵州贵阳550002
基金项目:国家自然科学基金资助项目,国家重大水专项
摘    要:利用BCR 3步提取法对太湖37个表层沉积物样品中重金属Ni、Cu、Zn和Pb的形态进行调查研究,并基于重金属形态评价方法(RSP)对太湖沉积物中4种重金属的潜在生态风险进行了初步评价.结果表明,太湖表层沉积物中Ni、Cu、Zn和Pb含量显著高于太湖沉积物背景值,分别超出背景值80.3%、13.5%、25.9%和69.6%,表现出明显的累积效应.残渣态和Fe-Mn氧化物结合态是太湖表层沉积物中4种重金属的主要赋存形态,4种重金属的可提取态比例均大于50%,具有较高的二次释放潜力.从RSP污染指数分析,太湖表层沉积物中4种重金属的潜在生态风险大小为为Ni>Zn>Cu>Pb,表层沉积物中可提取态重金属的空间分布特征明显,表现为北部湖湾>西太湖>其他区域

关 键 词:太湖  沉积物  重金属  形态  评价  
收稿时间:2011-01-21;

Speciation distribution and potential ecological risk assessment of heavy metals in sediments of Taihu Lake
CHEN Chun-xiao,JIANG Xia,ZHAN Yu-zhu,JIN Xiang-can,ZHAO Zheng.Speciation distribution and potential ecological risk assessment of heavy metals in sediments of Taihu Lake[J].China Environmental Science,2011,31(11):1842-1848.
Authors:CHEN Chun-xiao  JIANG Xia  ZHAN Yu-zhu  JIN Xiang-can  ZHAO Zheng
Institution:CHEN Chun-xiao1,2,JIANG Xia2,ZHAN Yu-zhu2,3,JIN Xiang-can2,ZHAO Zheng2,4(1.Beijing Normal University,Beijing 100875,China,2.Chinese Research Academy of Environmental Sciences,Beijing 100012,3.College of Chemical and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266510,4.College of Resources and Environmental Engineering,Guizhou University,Guiyang 550002,China)
Abstract:BCR three stage sequential extraction procedure was applied to examine the speciation and concentration of four heavy metals(Ni,Cu,Zn and Pb) in sediments of Lake Taihu,and the potential ecological risk of these heavy metals was assessed based on the rations secondary phase and primary phase(RSP).Concentrations of heavy metals in surface sediments were significantly higher than the background value of Taihu Lake sediment,which was 80.3%,13.5%,25.9%,69.6% beyond the background value of Ni,Cu,Zn,Pb.The major ...
Keywords:Taihu Lake  sediment  heavy metal  speciation  assessment  
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