摘要
以某大型铀矿采矿区、冶炼厂、尾矿坝及周边农田土壤五种重金属元素含量实测值为基础数据,对矿区农田土壤重金属污染状况采用改进的内梅罗综合污染指数法、地质累积指数法及潜在生态风险指数法进行综合分析评价,并通过相关性综合分析、主成分分析及聚类分析方法探究农田土壤五种重金属污染物的来源。结果表明,三个采样区农田土壤中镉、铬、铅和铜的污染严重程度:尾矿坝>冶炼厂>采矿区,放射性元素铀的污染严重程度:冶炼厂>尾矿坝>采矿区;研究区重金属污染严重,其重金属污染来源的关键因素是铀。该综合评价结果为铀矿区周边农田土壤中重金属污染的科学治理提供重要理论依据。
According to the measured data of the contents of five heavy metal elements from a large uranium mining area, a smelting plant, a tailings dam and the surrounding farmland, we used the improved Nemerow comprehensive pollution index method, the geological accumulation index method and the potential ecological risk index method to comprehensively analyze and evaluate the heavy metal pollution situation in the farmland soil of the mining area. We also studied the sources of the five heavy metal pollutants from the farmland soil through correlation comprehensive analysis, principal component analysis and cluster analysis methods. The results show that the pollution levels of cadmium, chromium, lead and copper from the farmland soil of the three sampling areas show this order: tailing dam >smelting plant > mining area, and the pollution levels of radioactive element uranium show this order: smelting plant >tailing dam > mining area. Now it is clear that the heavy metal pollution in the study area is very serious and the heavy metal pollution’s main source is uranium. The comprehensive evaluation results could provide an important theoretical basis for the scientific management of heavy metal pollution in farmland soil around the uranium mining area.
作者
代鹏飞
黄德娟
王帅
戴荧
钱坤
郑行
DAI Peng-fei;HUANG De-juan;WANG Shuai;DAI Ying;QIAN Kun;ZHENG Hang(Key Laboratory of Nuclear Resources and Environment,(East China University of Technology),Ministry of Education,Nanchang 30013,China;East China University of Technology,Nanchang 30013,China)
出处
《土壤通报》
CAS
CSCD
北大核心
2021年第1期198-202,共5页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(41867063)
国家自然科学基金项目(41361088)资助。
关键词
铀矿区
农田土壤
重金属
风险评价
污染来源
Uranium mining area
Farmland soil
Heavy metal
Risk assessment
Source of pollution
