西南林业大学学报2025，Vol.45Issue(1)：78-87,10.DOI:10.11929/j.swfu.202311043
贵州清镇耕地土壤重金属污染风险评价及来源解析
Risk Assessment and Source Analysis of Heavy Metal Pollution in Cultivated Soil in Qingzhen,Guizhou Province
摘要
Abstract
Taking cultivated soil in Qingzhen City As the research object,794 soil surface samples(0-20 cm)were collected from the study area,and the contents of 5 heavy metals(Cd,Hg,AS,Pb and Cr)in the samples were determined.were applied.The potential ecological risk and health risk of heavy metals in cultivated soil were evaluated with the potential ecological risk index method and human health risk model,and the source of heavy metals was analyzed by positive definite matrix factorization(PMF).The results showed that the average contents of Cd,Hg,As,Pb and Cr were 0.84,2.56,1.36,1.11 and 1.04 times of the background value of Guizhou Province,respectively.The potential ecological risk index of Hg was the highest,reaching 102.56,which was evaluated as strong potential ecological risk.The comprehensive potential risk in the study area was mainly slight potential risk.In the study area,the non-carcinogenic risk was mainly contributed by As and Pb,the carcinogenic risk was mainly contributed by Cr,and oral ingestion was the main exposure route.The health risk value of chil-dren was higher than that of adults.The main sources of the 5 heavy metals in the study area were:34.19%from natural sources in the western region,38.12%from mixed sources of industrial activities and atmospheric subsid-ence in the eastern region,and 41.21%from mixed sources of industrial activities and traffic emissions in the southern region.Hg was the primary pollutant in the study area and requires greater attention.Human health risks are within the safe range,and health risks are small,but monitoring should be strengthened to prevent potential risks.The mixed source of industrial traffic is the most important factor affecting the accumulation of heavy metals in cultivated soil of the study area.关键词
耕地/土壤/重金属/生态风险/健康风险/PMF模型Key words
cultivated land/soil/heavy metal/ecological risk/health risk/PMF model分类
环境科学引用本文复制引用
宋洋,崔文刚,刘绥华,张新鼎,梅艳,余银,余婷..贵州清镇耕地土壤重金属污染风险评价及来源解析[J].西南林业大学学报,2025,45(1):78-87,10.基金项目
国家自然科学基金项目(61540072)资助. （61540072）
