地质与资源2026，Vol.35Issue(4)：410-424,15.DOI:10.13686/j.cnki.dzyzy.2026.04.004
内蒙古十家满族乡矿集区土壤重金属生态风险评价及源解析
Ecological risk assessment and source apportionment of soil heavy metals in Shijia mining area,Inner Mongolia
摘要
Abstract
Focusing on the surface soil of Shijia mining area,a total of 161 soil samples are collected for analysis and determination of the contents and distribution characteristics of 8 heavy metal elements(Cd,Hg,As,Pb,Cr,Cu,Zn and Ni)in the study area.The soil environmental quality assessment and geoaccumulation index method are employed to analyze the overall soil quality status and pollution degree in the area.Combined with the potential ecological risk index method,the paper quantitatively analyzes the potential ecological risks of soil under the influence of pollution sources,and apportions the source of heavy metals by factor analysis and principal component analysis.The results show that the average values of all 8 heavy metals are higher than the background values,with local enrichment of element.The soil environmental quality assessment indicates that the soil in the mining area is generally clean,with the descending order of exceedance rates for the elements of Cd＞Cu=Hg＞Pb＞Cr＞As=Ni=Zn.The single-factor pollution levels of soil heavy metals are mainly Grade 1 to Grade 3.Only Hg shows extremely strong-strong pollution at individual points,while most soil samples are in a slightly polluted-unpolluted state,with the descending order of proportion of contaminated sampling points of As＞Hg＞Cd＞Cu＞Zn＞Ni＞Cr＞Pb.The potential ecological risk assessment reveals that soil in local areas is polluted by heavy metals such as Cd and Hg,exhibiting notably high ecological risks,with the descending order of single-factor potential ecological risk of Hg＞Cd＞As＞Cu＞Ni＞Pb＞Cr＞Zn.The source apportionment results indicate that Ni,Cr,As,and Pb share homologous sources,with Ni and Cr primarily influenced by natural weathering of parent rocks,As and Pb affected not only by soil parent materials but also by agricultural and industrial activities.The pollution sources of Cu and Zn are mainly influenced by human activities,with anthropogenic sources primarily of agricultural activities.Cd and Hg show weak correlations with other heavy metals,indicating different pollution sources.关键词
土壤/重金属/生态风险/源解析/内蒙古Key words
soil/heavy metals/ecological risk/source apportionment/Inner Mongolia分类
天文与地球科学引用本文复制引用
江山,邓颖,赵岩,姚远,于慧明,周丽,吴季寰..内蒙古十家满族乡矿集区土壤重金属生态风险评价及源解析[J].地质与资源,2026,35(4):410-424,15.基金项目
中国地质调查局项目"辽东山地丘陵区典型地区地质灾害精细调查与风险管控"(DD20230437) （DD20230437）
辽宁省科技计划联合计划"辽宁省抚顺西露天矿边坡监测预警阈值研究"(2024-MSLH-499). （2024-MSLH-499）
