生态环境学报Issue(11)：1832-1838,7.
会泽某铅锌矿周边农田土壤重金属生态风险评价
Heavy Metal Pollution and Ecological Risk Assessment of the Paddy Soils around A Pb-Zn Mine in Huize Country
摘要
Abstract
In order to investigated the metals concentrations and their potential ecological risks of heavy metals in soil, the concentrations of Cd, Hg, As, Pb ,Cr ,Cu and Zn in the topsoil of paddy fields near a smelting area located in the Hunan province were analyzed by field sampling and laboratory analysis. The experimental data indicate that the soil was seriously polluted by heavy metals, especially by Pb, As, Cd. Additionally, cluster analyses suggested that the study area is influenced by anthropogenic contributions. The chemical speciation analysis of heavy metal showed the available content of Cd mainly existed in exchangeable form (31.2%). The available content of Pb, Cu and Zn were distributed mainly in acid extractable fractions and Fe/Mn oxide fractions (27.9%, 30% and 27.2%), and Hg, As, Cr was mainly associated with residual fraction (90.4%, 72.9%and 76.8%). The results of risk assessment code showed Cd was medium and high risk (45.6%and 54.4%), Zn was medium risk (100%), Cu was low and medium risk (41.2% and 58.8%), Hg was mainly no risk (97.1%), As and Pb was mainly low risk (92.6% and 91.8%). The consequence of the average irE for heavy metals is Cd (331)>Hg (127.5)>Pb (43.6)>As (14.9)>Cu (9.3)>Zn (2.3)>Cr (2.1). The range of the potential ecological risk of soil is 58.2~1 839.3. There are 11%of sites classified as low risk, 27.1%classified as medium risk, 46.3%classified as high risk and 15.6%posed an extremely high risk. The above results indices the research area is presented with an important ecological risk.关键词
土壤/重金属/形态分析/潜在生态风险Key words
soil/heavy metals/spatial distribution/potential ecological risk分类
资源环境引用本文复制引用
陆泗进,王业耀,何立环..会泽某铅锌矿周边农田土壤重金属生态风险评价[J].生态环境学报,2014,(11):1832-1838,7.基金项目
2012年中国工程院重大咨询项目 （）
