By using Principal Component Analysis(PCA)and Positive Matrix Factorization(PMF)models,the spatial distribution and pollution sources of heavy metals in urban soils were studied.Compared to the background values,the average content of most elements is relatively high.Through PCA,human activities and natural parent materials were identified as the two main sources of pollution,which were further refined into three pollution factors:transportation activities,industrial activities,and natural sources through PMF.The health risk assessment shows that although children face a higher risk of cancer,all assessed heavy metal cancer risks have not exceeded acceptable levels,indicating that the carcinogenic risk of heavy metals in the soil of the region to the public is acceptable.
关键词
土壤重金属污染/健康风险评价/城市土壤
Key words
soil heavy metal pollution/health risk assessment/urban soil
维普
万方数据