Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 420, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126638
Keywords
Heavy metal contamination; Source identification; Pb isotopes; Human health; Urban soil and dust
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The study found that contamination of vanadium and chromium in the vanadium/steel plant (VsA) and cadmium, lead, and zinc in the iron-ore smelting (IsA) were significantly higher relative to other functional areas. The contaminated heavy metals in the soil and dust mainly came from smelting and manufacturing vanadium/steel products, coal combustion and traffic.
The contamination of heavy metals in urban soil and dust is closely related to anthropogenic emissions, while to what extent the metal contamination varies among different functional areas in industrial cities remains unclear. In this study, the contamination and health risk of seven heavy metals in the soil and dust were assessed at different functional areas of Panzhihua City, Southwest China, and their sources were identified by the spatial divisions and Pb isotopes. The results showed that the contamination of V and Cr in the vanadium/steel plant (VsA) and the contamination of Cd, Pb and Zn in the iron-ore smelting (IsA) were significantly higher relative to other functional areas. The sources of the contaminated heavy metals in the soil and dust were mainly from smelting and manufacturing vanadium/steel products, coal combustion and traffic. Vanadium and Cr were the major metals primarily contributing to the noncarcinogenic and carcinogenic risks, despite the low contamination level of Cr. The results indicate that the VsA is the priority control area in the Panzhihua City, and besides V, more attention should be paid in the future to monitor Cr risk in the soil and dust because of its high contribution to the health risk.
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