| 贵州草海沉积物重金属污染特征及潜在生态风险分析 |
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| 引用本文： | 林绍霞,张清海,郭媛,欧阳勇,林昌虎.贵州草海沉积物重金属污染特征及潜在生态风险分析[J].农业环境保护,2012(11):2236-2241. |
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| 作者姓名： | 林绍霞 张清海 郭媛 欧阳勇 林昌虎 |
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| 作者单位： | [1]贵州省理化测试分析研究中心,贵阳550001 [2]贵州科学院,贵阳550001 [3]贵州大学,贵阳550025 |
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| 基金项目： | 贵州省社会发展攻关项目（黔科合SY字[2010]3094号）; 贵州省教育人才省长资金项目（黔省专合字[2011]16号）; 贵州科学院青年基金项目（黔科院J合字[2010]011号） |
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| 摘 要： | 为研究重金属在草海沉积物中富集污染状况,以7种毒性重金属为研究对象,从不同方位对草海沉积物中重金属进行采样测试,分析重金属含量水平及空间分布特征,同时应用潜在生态危害指数法进行评价。结果表明,草海沉积物中重金属富集特征为Zn〉Cr〉Pb〉Cu〉As〉Cd〉Hg,且在空间分布上呈现从湖心向边缘逐渐减少的趋势,重金属污染程度表现为Cd〉Hg〉Zn〉Pb〉As〉Cu〉Cr,在Cd的潜在生态风险系数高贡献下,沉积物中重金属潜在生态风险指数均大于150,多数达到严重程度。
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| 关 键 词： | 草海 沉积物 重金属 潜在生态风险 |
Pollution Characteristics and Potential Ecological Risk Assessment of Heavy Metals in Sediments of Caohai in Guizhou Province,China |
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| LIN Shao-xia,ZHANG Qing-hai,GUO Yuan,OUYANG-Yong,LIN Chang-hu.Pollution Characteristics and Potential Ecological Risk Assessment of Heavy Metals in Sediments of Caohai in Guizhou Province,China[J].Agro-Environmental Protection,2012(11):2236-2241. |
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| Authors: | LIN Shao-xia ZHANG Qing-hai GUO Yuan OUYANG-Yong LIN Chang-hu |
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| Institution: | 1.Guizhou Research Center of Physical Testing ＆ Chemical Analysis,Guiyang 550001,China;2.Guizhou Academy of Sciences,China 550001,China;3.Guizhou University,Guiyang 550025,China) |
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| Abstract: | In order to investigate the pollution and accumulation characteristics,sediments from different directions in Caohai wetland were collected and concentrations of Zn,Cr,Pb,Cu,As,Cd and Hg in sediments were detected.Meanwhile,the spatial distribution characteristics of heavy metals in sediments were analyzed and the potential ecological risks were evaluated with RI（The Potential Ecological Risk Index）.The results showed the order of the concentrations of heavy metals in the sediments was ZnCrPbCuAsCdHg and the spatial distribution of decrease from center to edge.The order of pollution level of different heavy metals was CdHgZnPbAsCuCr.The potential ecological risk index of heavy metals in sediments exceed 150 due to the high concentrations of Cd.And,the results also showed serious degree of pollution of most sampling points. |
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| Keywords: | Caohai sediments heavy metals potential ecological risk |
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