| 洞庭湖滩地重金属分布及其生态风险评价 |
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| 引用本文： | 李永进,汤玉喜,唐洁,吴敏.洞庭湖滩地重金属分布及其生态风险评价[J].中南林业科技大学学报,2011,31(2). |
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| 作者姓名： | 李永进 汤玉喜 唐洁 吴敏 |
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| 作者单位： | 湖南省林业科学院; |
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| 基金项目： | 国家“十一五”科技支撑项目“江河滩地生态修复与综合治理技术试验示范”(2006BAD03A15) |
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| 摘 要： | 采用内梅罗综合污染指数和Hakanson潜在生态危害指数法对洞庭湖退田还湖滩地土壤重金属分布特征、污染状况和潜在生态危害进行了评价。结果表明:与湖南省潮土背景值相比较,三个样地的中Pb、Cu、As的含量平均值都超过了背景值,Cd和Cr的含量平均值小于背景值,且Pb的平均含量均是湖南省潮土背景平均值的2倍多;广兴洲样地土壤中6种重金属的平均含量值均高于其他样地;集成垸土壤中的Pb、As和三个样地土壤中Cd重金属含量较易受外界环境因素的影响而波动较大。对重金属间及其与土壤理化性质进行相关性分析可知,Pb与pH有极显著的负相关性,6种金属元素与有机质存在正相关,Pb、Zn、As与全氮也存在一定的正相关,Pb与Zn以及Cu与Cd、Zn、As之间存在极显著的正相关性,Cd与Zn、As以及Cr与As之间存在显著的正相关性。由样地土壤中的重金属污染指数可知,广兴洲样地的土壤重金属污染指数和潜在生态危害系数均比其他样地高,但均属于轻微污染和存在轻微潜在生态危害。
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| 关 键 词： | 洞庭湖 滩地 土壤 重金属 潜在生态危害 |
Distribution and ecological risk assessment 0f heavy metal elements in soils of the beaches in Dongting Lake |
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| LI Yong-jin,TANG Yu-xi,TANG Jie,WU Min.Distribution and ecological risk assessment 0f heavy metal elements in soils of the beaches in Dongting Lake[J].Journal of Central South Forestry University,2011,31(2). |
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| Authors: | LI Yong-jin TANG Yu-xi TANG Jie WU Min |
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| Institution: | LI Yong-jin,TANG Yu-xi,TANG Jie,WU Min(Hunan Academy of Forestry,Changsha 410004,Hunan,China) |
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| Abstract: | The distributions,soil environment status and potential ecological risk of heavy metal were studied in beaches soil of rechange the cropland into lake in Dongting Lake by adopted Nemerow's and Hakanson's methods.The results show that means of heavy metals in the soil collected from the three beaches were compared with the background values of soil heavy metal in Hunan province,the average content of Pb,Cu,As in the soils of the three beaches were all higher than the background values,and the average content... |
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| Keywords: | Dongting lake beach soil heavy metal potential ecological risk |
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