Monitoring of Atmospheric Dry and Wet Deposition Flux Characteristics and Human Health Risk in Agricultural Areas
In order to study the flux characteristics of atmospheric dry and wet deposition elements and human health risks in agricultural are-as,13 atmospheric dry and wet deposition sampling points were established in Miluo City from April 2020 to April 2021.A total of 52 atmos-pheric dry and wet deposition samples were systematically collected,and combined with the surface soil data around the atmospheric sampling points,the characteristics of atmospheric dry and wet deposition,the correlation between atmospheric dry deposition and heavy metal elements in corresponding soil,and the human health risk assessment in the study area were investigated. The results showed that the annual flux of at-mospheric dry and wet deposition in Miluo City from smallest to largest were Hg < Cd < As < Cr < Pb,and there were significant differences in the content of each element. Cr and Pb were the main heavy metal elements in atmospheric dry and wet deposition in Miluo City.The corre-lation between atmospheric dry deposition and corresponding soil was low,and atmospheric dry deposition was not the main source of heavy metal elements in surface soil in Miluo City.As and Pb were the main potential non-carcinogenic risk factors,and their non-carcinogenic risk quotient (HQ) contributed more than 35％ to the non-carcinogenic risk index (HI).However,the HI values of the five heavy metals are less than 1,indicating that the impact of non-carcinogenic health risks was relatively small;The risk index of heavy metal carcinogenicity (CR) of As,Cd and Cr were all less than 10-6,indicating that there was no carcinogenic risk.The HI values for As and Pb in children were 0.83 and 0.73,respectively,which were less than 1.00,indicating a lower possibility of non-carcinogenic risks.
Atmospheric dry and wet depositionHeavy metalAnnual atmospheric deposition fluxHealth risk
万方数据
维普
