中文关键词铅锌矿土壤重金属空间主成分潜在风险 英文关键词lead-zinc minesoilheavy metalsprincipal component analysisecological risk

作者	单位	E-mail
周艳	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042	zhouyan@nies.org
陈樯	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042
邓绍坡	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042
万金忠	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042
张胜田	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042
龙涛	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042
李群	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042
林玉锁	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042
吴运金	环境保护部南京环境科学研究所, 南京 210042 国家环境保护土壤环境管理与污染控制重点实验室, 南京 210042	wyj@nies.org

中文摘要 以西南某铅锌矿区周边农田土壤作为研究对象，采集土壤表层（0~20 cm）149个土壤样品，分析测定了As、Cd、Cr、Cu、Hg、Ni、Pb、Zn共8种重金属含量.采用多元统计分析，揭示了研究区农田土壤重金属污染的主要来源及各元素之间的相关性；并应用Hakanson潜在生态风险指数法，对农田土壤生态风险进行评价.结果表明，研究区农田土壤重金属Cd、Pb、Zn含量相对处于极高水平，均值分别为15.56、419.4、933.4 mg·kg^-1，污染十分严重；Hg和As的均值分别为0.13 mg·kg^-1和37.3 mg·kg^-1，属于中度污染；Cu、Ni、Cr的均值分别为26.1、14.3、33.4 mg·kg^-1，未超过云南省土壤环境背景值；多元统计分析结果显示Cd、Pb、Zn、Hg、As这5种元素来源相似，主要来源于矿山开采和工业活动；Cu、Ni、Cr这3种元素来源相似，主要是自然来源；研究区综合潜在生态风险指数RI的均值为2294.8，整体上处于极高生态风险水平.矿区开采和工业活动对农田土壤造成了严重的重金属污染. 英文摘要 The farmland soil around a Pb-Zn mine in southwestern China was studied. One hundred forty-nine surface soil samples were taken from 0-20 cm depth, and the contents of As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn were tested. The correlations among these heavy metals were studied with multivariate analysis, and the potential sources of the metals were identified. The environmental risk of the metals was evaluated with the Potential Ecological Risk Index method. The results showed that the amounts of Cd, Pb, and Zn were at relatively high level, with average concentrations of 15.56, 419.4, and 933.4mg·kg^-1 respectively, indicating the soil was heavily polluted. The average concentrations of Hg and As were 0.13 and 37.3mg·kg^-1, suggesting moderate soil pollution. The average concentrations of Cu, Ni, and Cr were lower than Yunnan soil background values. The multivariate analysis suggested that the sources of Cd, Pb, Zn, Hg, and As were similar and came mainly from smelting activities in the mining area. The sources of Cu, Ni, and Cr were similar and can be attributed to natural sources. The comprehensive potential ecological risk index was 2294.8, which suggested a high potential ecological risk. In general, the farmland soils in the research area were polluted seriously by the mining and industrial activities.

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