摘要
为将历史工业场地残留的重金属污染物控制在环境可接受水平,对云南省某历史堆存渣场的重金属污染情况进行了调查。结果表明:土壤重金属的污染程度从重到轻排序为Cr(VI)>As=Cr。土壤中各重金属含量在垂向上总体呈现表层较低、中层逐渐升高出现峰值、而后随深度增加逐渐变低的特征。场地的六价铬、总铬和砷等污染物主要分布在工业场地的东南部。对场地开展风险评估,显示六价铬浓度超出可接受水平,应对场地采取相应的修复措施。
The investigation was conducted on heavy metal pollution in a historical slag field of Yunnan province in order to control the concentration of heavy metal pollutants under environmentally acceptable levels. The results showed that the pollution degree of heavy metals was in the order of Cr （VI） 〉 As = Cr. The content of heavy met- als on the vertical direction indicated that the highest concentration was detected in the middle layer. The concen- tration of chromium （ VI）, total chromium and arsenic in the field were mainly distributed in the southeastern part of the slag field, gradually decreased from the southeast to the northwest, The results of environmental risk assessment showed that the concentration of chromium （VI） was beyond the acceptable level, which meant that the resto- ration measures were needed.
出处
《环境科学导刊》
2016年第A01期106-109,共4页
Environmental Science Survey
关键词
土壤
重金属
分布特征
风险评估
soil
heavy metal
distribution characteristic
risk assessment
