Source Apportionment of Heavy Metals in Topsoil of Typical Key Supervision Enterprises Contiguous Area
Based on the topsoil of typical key supervision enterprises contiguous area,correlation analysis,principal compo-nent analysis and positive definite matrix factorization(PMF)models were used to explore the sources of heavy metals in soil of the contiguated areas of key supervision enterprises.The main sources of topsoil heavy metals in the study area were indus-trial sources,transportation sources,natural sources and residents sources,with contribution rates of 38.38%,29.71%,19.70%and 12.21%,respectively;Among them,the main sources of Cd and As are industrial sources,the main sources of Pb and Zn are industrial sources and transportation sources,the main sources of Cr,Ni and Cu are natural sources,and the main sources of Hg are residents sources.