安徽大学学报（自然科学版）2025，Vol.49Issue(5)：98-108,11.DOI:10.3969/j.issn.1000-2162.2025.05.012
重庆市典型企业周边土壤重金属污染特征、生态风险评价及定量溯源解析
Pollution characteristics,ecological risk assessment,and quantitative traceability analysis of heavy metals in soils around typical enterprises in Chongqing
摘要
Abstract
In this study,based on the measured data of six heavy metals,including Cd,Hg,As,Pb,Cu,and Ni,in surface soil samples around typical enterprises in Chongqing since 2022,cluster analysis,principal component analysis,positive matrix factorization(PMF)model,and potential ecological risk index methods were used to analyze the pollution characteristics,sources,and potential ecological risks of heavy metals in soil.The results showed that,except for As,the average content of five heavy metals,including Cd,Hg,Pb,Cu,and Ni,was higher than the soil background of surface soils in China and Chongqing.There were significant differences in the content of soil pollutants and the current status of soil environmental quality among different industries,with power generation industry having the best soil environmental quality,while non-ferrous metal smelting and rolling industry and environmental governance industry had relatively poor soil environmental quality.PMF source analysis showed that As was mainly from natural sources,with a contribution rate of 78.8％;Hg mainly originated from the production activities of chemical drugs,solid waste and hazardous waste treatment and disposal,with a contribution rate of 78.7％;Cd,Pb,Ni,and Cu were mainly produced through metal smelting and rolling processing,with contribution rates of 62.6％,56.3％,67.6％,and 67.3％,respectively.In addition,the soil in the study area was at a moderate ecological risk level.Notably,the contribution rates of Hg and Cd to the study area were as high as 58.1％and 31.2％,respectively.关键词
土壤/重金属/典型企业/潜在生态风险/源解析Key words
soil/heavy metals/typical enterprises/potential ecological risk/source resolution分类
资源环境引用本文复制引用
李小红,刘正实,邓娟,陈忠,何春兰..重庆市典型企业周边土壤重金属污染特征、生态风险评价及定量溯源解析[J].安徽大学学报（自然科学版）,2025,49(5):98-108,11.基金项目
重庆市科研机构绩效激励引导专项(CSTB2023JXJL-YFX0044) （CSTB2023JXJL-YFX0044）
重庆工商大学科研平台开放课题(KFJJ2019054) （KFJJ2019054）
