Distribution and Traceability Analysis of Soil Contaminants of a Closed Fine Chemical Plant in East China
Takeing a site of a shut-down and relocated fine chemical plant in East China as an example,a total of 40 soil samples at different depths were collected in 5 production areas,and based on the vertical and planar characterisation of contaminant concentration distribution,the spatial distribution pattern,degree of variation and correlation of soil contaminant content were investigated and analysed by using Pearson Correlation Analysis and Principal Component Analysis.The results showed that the mean contents of As,Cu,Ni,Pb,Hg,Sb,Be,Co,V and C10～C40 in the soil exceeded the control values,indicating that the soils have been subjected to a certain degree of exogenous contamination,but the level of contamination is relatively low.The results of correlation analysis and principal component analysis revealed that the spatial heterogeneity of Hg and C10～C40 concentrations in the soils was the strongest,which were greatly affected by anthropogenic activities,and the sources were relatively independent.The elements V,Co,Ni,Sb,As,Cd and Pb were significantly correlated,originating from chemical and combustion sources,with a load of 45.2%,and Bis(2-ethylhexyl)Phthalate(DEHP)was associated with anthropogenic activities such as the production and use of plasticisers,with a load of 17.9%.
fine chemicalsoil contaminationcontamination distributionsource analysis
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