西北师范大学学报（自然科学版）2025，Vol.61Issue(3)：43-54,12.DOI:10.16783/j.cnki.nwnuz.2025.03.006
金尾矿库土壤重金属污染特征及生态健康风险评估
Pollution characteristic,ecological and health risk assessment of soil heavy metal in a gold mine tailings pond
摘要
Abstract
Taking a closed gold mine tailings pond in Longnan,Gansu Province as the research object,this study analyzed and evaluated the content characteristics,pollution levels,ecological risks,and health risks of 8 heavy metal elements in 36 soil samples in the study area from different stacking times and soil depths.The results indicate that soil pollution in the study area is mainly caused by As,Cd and Hg.As is mainly free to moderate pollution,Cd is mainly moderate pollution,and Hg is mainly extremely heavy pollution.The tailings pond as a whole shows an extremely heavy pollution level.80.5%of the As points in the research area show low ecological risk,66.7%of the Cd points show high ecological risk,100%of the Hg points show extremely high ecological risk,and the overall ecological risk of the tailings pond is extremely high risk.The heavy metals in the soil of the research area pose both carcinogenic and non carcinogenic risks to both adults and children.The main exposure pathways for carcinogenic risk are oral ingestion and skin contact,with the main contributing elements being As,Cd,and Cr.The main exposure pathway for non carcinogenic risks is oral ingestion,with the main contributing elements being As and Hg.关键词
尾矿库/重金属/污染特征/生态风险评估/健康风险评估Key words
tailings pond/heavy metal/pollution characterization/ecological risk assessment/health risk assessment分类
环境科学引用本文复制引用
马晓红,杨松,温静,王博,任学昌,马利邦..金尾矿库土壤重金属污染特征及生态健康风险评估[J].西北师范大学学报（自然科学版）,2025,61(3):43-54,12.基金项目
甘肃省科技重大专项项目(22ZD6WA057) （22ZD6WA057）
甘肃省重点研发计划项目(23YFFA0076) （23YFFA0076）
