摘要
利用指数法对废弃农田土壤中的砷和重金属污染程度进行评价。内梅罗指数基于土壤环境质量标准计算而得,其评价结果显示:所有土壤采样点没有受到砷、铅、铬、镉和汞的污染;地累积指数基于土壤地球化学背景值计算而得,其评价结果显示:研究区内的地累积指数平均值从大到小排列依次为:汞(0.74)>镉(0.17)>铬(-0.18)>铅(-0.33)>砷(-0.92)。汞和镉元素可能受到人类活动影响,在表层土壤中总体呈现累积现象。
To assess the levels of arsenic and heavy metal pollution in abandoned agricultural soils, established pollution indices were used in this study. Nemerow’s pollution index, which is calculated based on the soil environmental quality standard, indicated that none of the soil sampling sites were polluted by As, Pb, Cr, Cd, and Hg. According to the geoaccumulation index, calculated based on soil geochemical backgrounds, the average geoaccumulation index values in the study area were ordered as follows: Hg (0.74)> Cd (0.17)> Cr (-0.18)> Pb (-0.33)> As (-0.92). In general, mercury and cadmium were accumulated in the topsoil, which may be influenced by human activities.
作者
陶恺赟
TAO Kaiyun(Shanghai Institute of Geological Survey, Shanghai 200072, China;Shanghai Center for Intendance and Testing of Resources and Environment, Ministry of Natural Resources of China, Shanghai 200072, China)
出处
《上海国土资源》
2019年第3期72-76,共5页
Shanghai Land & Resources
基金
上海市环保局与上海市规土局合作项目“上海市地下水基础环境状况调查评价(2013-2018年)”
关键词
土壤环境质量
污染评价
重金属
地累积指数
内梅罗指数
农用地
soils environmental quality
pollution evaluation
heavy metals
geoaccumulation index
Nemerow pollution index
agricultural land
