五台山南台土壤重金属特征及污染风险评价  

Pollution Characteristics and Potential Ecological Risk Assessment of Soil Heavy Metal in the South Top of Wutai Mountain,Shanxi,China

作　　者：郑海霞[1] 王月[2] 陈芬 勾朝阳[1] 郑庆荣[1] ZHENG Haixia;WANG Yue;CHEN Fen;GOU Chaoyang;ZHENG Qingrong(Geography Department,Xinzhou Teachers University,Xinzhou Shanxi 034000,China;School of Environment and Resource,Guangxi Normal University,Guilin Guangxi 541006,China;Wujiang Faculty,Tongren University,Tongren Guizhou 565200,China)

机构地区：[1]忻州师范学院地理系,山西忻州034000 [2]广西师范大学环境与资源学院,广西桂林541006 [3]铜仁学院乌江学院,贵州铜仁565200

出　　处：《广西师范大学学报（自然科学版）》2018年第4期99-107,共9页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金青年基金(41701038);忻州师范学院青年基金(QN201325);广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室主任基金(ERESEP2015Z14);广西师范大学重点项目(2016ZD006);广西师范大学博士科研启动项目;岩溶生态与环境变化研究广西高校重点实验室主任基金(YRHJ15Z014);广西自然科学基金(2017GXNSFBA198129);广东省自然科学基金(2015A030310275)

摘　　要：通过采集五台山南台西进山口至南台顶公路段两侧的土样,分析不同海拔和不同深度土层中土壤的Cu、Zn、Pb、Cr、Ni、Cd、As等7种重金属元素的含量,运用地累积指数法和潜在生态风险指数法对土壤重金属污染进行分析和评价。结果表明:(1)五台山南台土壤环境总体污染程度处于"无—偏中度"污染;(2)随海拔的升高,重金属污染程度有加大的趋势;0～10cm土层中重金属的污染程度普遍高于10～20cm土层;(3)各重金属潜在生态危害风险程度由强到弱依次为:Cd>As>Cu>Ni>Cr>Pb>Zn,且随海拔高度升高而增大,总体上处于"高生态风险"等级,0～10cm与10～20cm土层的潜在综合生态风险等级分别为"极高生态风险"和"较高生态风险",其中Cd的影响占绝对主导地位。In this study,Cu、Zn、Pb、Cr、Ni、Cd and As were analyzed in the soil samples and they were collected on the highways from the west entrance to the top of the south of Wutai Mountain in different elevations and different soil layers.Two indices-the Index of Geoaccumulation and the Potential Ecological Risk Index were used to evaluate the degree of pollution by heavy metals.The results indicated that the soils in study area were characterized by on-to-partial moderate pollution and posed a high potential ecological risk.With the altitude increasing,the degree pollution and the potential ecological risk increased.The degree pollution and the potential ecological risk in the 0-10 cm layer were higher than that in 10-20 cm layer.The potential ecological risk was characterized by the order of Cd>As>Cu>Ni>Cr>Pb>Zn with the increase of altitude,which belonged to the level of“high ecological risk”on the whole.The potential comprehensive ecological risk level of 0-10 cm and 10-20 cm soil layers is“the highest ecological risk”and“higher ecological risk”respectively with the predominant risk factor being Cd.

关 键 词：土壤重金属 地积累指数 潜在生态风险 污染评价 五台山南台 

分 类 号：X5[环境科学与工程—环境工程]