期刊论文

Pollution and risk assessment of heavy metal in agricultural soil around an abandon mine site in Hunan Province

中文

环境化学

0254-6108

2020

39

4

1024-1030

10.7524/j.issn.0254-6108.2019040201

国家自然科学基金(41671475) 科技部重点研发项目(2018YFD0800700) 湖南农业大学“双一流”建设项目(SYL201802021)资助

本校为第一机构

为了进一步了解湖南省某矿遗址周围农田土壤重金属的风险,在该矿遗址附近两个区域(Ⅰ区、Ⅱ区)采集125个农业土壤样品,分析其中重金属(As、Cd、Cr、Cu、Pb)的含量,运用综合污染评价法、潜在生态指数法和地积累指数法对其开展风险评估.结果 表明,Ⅰ区农田土壤中As和Cd的含量比国家风险管控标准值高,属于中度污染土壤,存在着极高的潜在生态风险;地积累指数进一步指出Ⅰ区土壤中As污染属于二级污染、Cd污染属于四级污染.Ⅱ区农田土壤,除Cd的含量相对较高外,其它重金属含量均很低,该区域土壤重金属的综合污染评价值低于1.0.但是由于Ⅱ区土壤中Cd的地积累指数为1.92,表明Ⅱ区土壤受到Cd的轻度污染,存...

To evaluate the risk of heavy metals pollution from arable soils in an abandon mine area in Hunan Province. Heavy metal contents (As,Cd,Cr,Cu,and Pb) in 125 agricultural soil samples collected from two investigation zones (named I and Ⅱ,respectively) around the mine area were analyzed. Three different risk assessment methods,including a comprehensive pollution assessment method,potential ecological index method and index of geo-accumulation (I_(geo)) were employed in the present study. According to the national risk management standards (NRMS)...