三亚市果蔬地重金属空间分布及其污染评价  

Heavy metals in orchard and vegetable garden soils of Sanya City:Spatial distribution and contamination evaluation

作　　者：李福燕[1,2] 李许明[3] 吴鹏飞[1,2] 赵雄[1,2] 张冬明[1,2] 漆智平[2] 

机构地区：[1]海南大学农学院,海南儋州571737 [2]中国热带农业科学院热带作物品种资源研究所热带资源与环境研究中心,农业部热带作物种质资源利用重点开放实验室,海南儋州571737 [3]海南省国土资源环境厅信息中心,海口570203

出　　处：《生态学杂志》2010年第2期382-386,共5页Chinese Journal of Ecology

基　　金：中国热带农业科学院热带作物品种资源研究所研究生科研基金(YJS-2008-B003);海南省重点科技计划项目(080402);海南省自然科学基金项目(808197);科技部科技基础性工作和社会公益研究专项资助项目(2004DIB3J073)

摘　　要：通过野外调查采样,采用标准对比法和地累积指数法,评价了三亚市果蔬地表层土壤重金属的污染状况。结果表明:土壤中Hg、Cd、Cr、Pb和As5种重金属的积累不显著,其平均值均未超过国家环境质量二级标准(GB15618-1995);但Hg、Cd和Pb的平均值高于海南岛农用地的自然背景值,表明存在区域轻度污染;Cr、Hg、Pb和As4种重金属元素的变异系数均>1,表明土壤中Cr、Hg、Pb和As的分布极不均匀。同时,利用地理信息系统(GIS)Krging插值方法得到了5种重金属的空间分布图,显示出不同重金属元素的空间分异特征,为三亚市果蔬地的可持续开发利用提供指导。Through field sampling and by using standard comparison and geoaccumulation index methods,the heavy metals contamination status of surface soils in the orchards and vegetable gardens of Sanya City was evaluated. In the test surface soils,the average concentrations of Hg,Cd,Cr,Pb and As were all lower than the Grade Ⅱ of China National Environment Quality Standard （GB 15618-1995）,but those of Hg,Cd and Pb were higher than the background values of farmlands in Hainan Island,showing a slight pollution in certain areas. The variation coefficients of the metals were all〉 1,suggesting their extremely uneven distribution in the soils. The spatial distribution patterns of the five heavy metals obtained by using Kriging algorithm approach displayed spatial heterogeneity of soil heavy metals contamination,which provided guidance for the sustainable development and utilization of orchards and vegetable gardens in Sanya City.

关 键 词：土壤 重金属 环境质量评价 三亚市 

分 类 号：X825[环境科学与工程—环境工程]