Analysis of heavy metal sources in soil of ammunition destruction site based on APCS-MLR receptor model
In order to grasp the pollution status and sources of heavy metals in ammunition destruction sites,the pollution status,distribution characteristics and pollution sources of 39 surface soil heavy metals(Cr,Ni,Cu,Zn,As,Cd,Sb,Pb)in this destruction site were evaluated and analyzed,taking a typical ammunition destruction site in Shanxi as an example.The results showed that the average contents of the surface soil heavy metals Cr,Ni,Cu,Zn,As,Cd,Sb and Pb in the shell dumping area were 45.57,23.43,325.54,265.43,9.53,0.42,304.17,13174.29 mg·kg-1,respectively,while the average contents of the surface soil heavy metals Cr,Ni,Cu,Zn,As,Cd,Sb and Pb in the rest of the area were 45.57,23.43,325.54,265.43,9.53,0.42,304.17,13174.29 mg·kg-1,respectively,As,Cd,Sb and Pb were 102.09,26.75,1137.18,3007.13,7.71,0.95,70.65,2894.97 mg·kg-1 respectively,which were all higher than the background values in Shanxi Province.The results of the pollution index evaluation showed that the accumulation of Pb,Zn,Cu,Sb and Cd was high.The ecological hazard index for soil heavy metals in the study area was 2653.35,reaching a very high ecological risk level.The absolute principal component score-multiple linear regression model(APCS-MLR)showed that the sources of Ni,Cd,Zn,Cr and Cu were mainly mixed sources with a contribution of 72.94%,the main sources of Pb and Sb were destruction sources with a contribution of 53.99%,and natural sources contributed the most to As with a contribution of 44.63%.
ammunition destruction siteheavy metalspollution characteristicspotential ecological risksAPCS-MLR receptor model
NETL
NSTL
万方数据
