地质与资源2026，Vol.35Issue(4)：379-389,11.DOI:10.13686/j.cnki.dzyzy.2026.04.001
三江平原宝清地区土壤重金属来源及生态风险评价
Source and ecological risk assessment of soil heavy metals in Baoqing County,Sanjiang Plain
摘要
Abstract
A total of 244 topsoil samples were collected from Baoqing County in the Sanjiang Plain to analyze the concentration characteristics of eight heavy metals(As,Cd,Cr,Cu,Hg,Ni,Pb,and Zn).The sources of these heavy metals are analyzed with data statistics.The pollution level and potential ecological risk are assessed using the Nemerow comprehensive pollution index and potential ecological risk index methods,respectively.The results indicate that Cr,Ni,and Cu are primarily influenced by a combination of anthropogenic coal combustion dust,nickel ore mining,and the geological background.Cd,Hg,and Zn are mainly affected by agricultural activities and bedrock parent materials,whereas mining and human activities are the dominant factors for As and Pb.The assessment based on the Nemerow index suggests a relatively low overall pollution risk in the study area.The single-factor pollution indices of the metals decrease in the order:Ni＞Cr＞As＞Zn＞Cu＞Cd＞Hg＞Pb.According to the potential ecological risk index,the soil environment in the study area is generally at a slight level of potential ecological hazard.Hg and Cd are identified as the primary risk elements,mainly presenting slight to moderate ecological hazard levels,with intense or very intense hazard levels being scarcely distributed.Overall,the ecological hazard in the study area is relatively low,the risk is considered manageable.关键词
土壤重金属/生态风险评价/内梅罗指数/潜在生态危害/三江平原Key words
soil heavy metal/ecological risk assessment/Nemerow index/potential ecological hazard/Sanjiang plain分类
天文与地球科学引用本文复制引用
赵建,孔繁鹏,杨晓波,董冠宏,邵吉亮,张磊,张也,张洪文..三江平原宝清地区土壤重金属来源及生态风险评价[J].地质与资源,2026,35(4):379-389,11.基金项目
中国地质调查局自然资源综合调查监测项目"三江平原宝清地区黑土地地表基质层调查"(DD20211588) （DD20211588）
区域地质与地球系统调查项目"三江平原宝清湿地退化区1∶5万地表基质调查"(DD20242039) （DD20242039）
自然资源综合调查指挥中心科技创新基金项目(KC20220002). （KC20220002）
