查看文章

This study focuses on the health risks caused by potentially toxic metal (Cd, Cr, Hg, Ni, and Pb) contamination in soil. Principal component analysis (PCA) and hierarchical cluster analysis (HCA) were used to identify the source of heavy metal. While non-carcinogenic and carcinogenic risks were determined using deterministic (USEPA’s human health risk assessment methods) and probabilistic methods (Monte Carlo Simulation model), respectively. The mean concentration of heavy metal increased in the order of Cd < Ni < Pb < Hg < Cr. PCA, HCA, and spatial distribution demonstrated that Pb and Ni may be derived from anthropogenic activities, whereas Cr and Hg were mostly derived from natural sources. Adults and children were relatively safe from non-carcinogenic risk except for children living near mining and cement factories (THI > 1). The total average cancer risk of adults and children was 2E-03 and 7E-04 …