期刊论文

ECOLOGICAL RISK ASSESSMENT OF HEAVY METALS IN SOILS OF LIANHUA TOWN IN THE SUBURBS OF CHANGSHA

中文

环境工程

1000-8942

2020

38

5

202-209

10.13205/j.hjgc.202005035

本校为第一机构

选择长沙市近郊的莲花镇作为研究对象,采集了镇域范围内54个土壤样品,运用综合的生态风险评价方法对Hg、Cd、As、Pb、Cr 5种土壤重金属元素污染程度及对人体的健康危害程度进行评价.结果 表明:1)5种重金属元素的污染程度排序为Cd＞Hg＞Pb＞As＞Cr,Cd呈现重度污染;Cd和Pb空间变异显著,其来源受人为干扰程度高.2)5种重金属元素的潜在生态危害排序为Cd＞Hg＞As＞Pb＞Cr,Cd和Hg处于强生态危害程度,是研究区域土壤重金属污染的主要因子;研究区域综合潜在生态风险达到强生态危害等级.3)“手-口”摄入是土壤重金属暴露的主要途径,儿童的非致癌暴露剂量远大于成人.5种重金属对儿童和成人所产生的非致癌风...

In Lianhua Town,the suburb of Changsha,54 soil samples were collected,and the contents of 5 heavy metal elements including Hg,Cd,As,Pb and Cr,were measured.A comprehensive ecological risk evaluation method was used to evaluate the pollution degree of heavy metal elements in soils and their harm to human health.The results were as follows:1)The average contents of Cd,Hg and Pb exceeded more than 1 time of the soil background value in Hunan province,and the accumulation in the soil was more obvious;the spatial variation of Cd and Pb was significa...