Enrichment characteristics,source identification,and health risk assessment of soil heavy metals in typical cultivated land in the mountainous area of southern Anhui Province
This study aims to explore the enrichment characteristics and origin of soil heavy metals in typical cultivated land in the mountainous area of southern Anhui province.With Ningguo City in southeastern Anhui Province as the research object,this study col-lected 1399 topsoil samples in the cultivated land for determining the concentrations of As,Cd,Hg,Pb,Cr,Ni,Cu,and Zn.Fur-thermore,this study conducted a health risk assessment and source identification of heavy metals using the correlation analysis,the soil environmental quality-risk control standard for soil contamination of agricultural land,the geoaccumulation index,the health risk in-dex,and the positive matrix factorization(PMF)model.The results are as follows:(1)The average concentrations of As,Cr,Hg,Pb,Cr,Ni,Cu,and Zn were 15.8×10-6,0.41×10-6,0.106×10-6,31×10-6,67×10-6,29×10-6,29×10-6,and 94×10-6,respec-tively,which were all higher than their background values in Anhui Province,except Ni.(2)The soil heavy metals generally exhibited low pollution risks,with the heavy metal concentrations of 866 soil samples lower than their risk screening values.(3)The cultivated soil was primarily polluted by Hg,Cd,and As,as indicated by the geoaccumulation index results.(4)Both non-carcinogenic and car-cinogenic risk levels in adults in the study area were within the acceptable ranges,as revealed by the health risk assessment results.(5)Four sources of heavy metals in the study area were identified based on the PMF model:industrial and agricultural emissions asso-ciated with human activities,atmospheric deposition,soil parent materials related to soil types,and the geological background source.
cultivated landsoil heavy metalshealth riskPMF model
万方数据
维普
