Abstract:
:To investigate the impact of artisanal zinc smelting activities (AZSA) on the distribution and enrichment of trace metal(loid)s in street dust of a small city in Guizhou province, SW China, street dust samples were collected and analyzed for 10 trace metal(loid)s (Cr, Co, Ni, Cu, Zn, As, Cd, Sb, Pb, and Hg). Meanwhile, the health risks of local resident exposed to street dust were assessed. The result showed that the average concentrations of 10 elements were Zn (1039 mg kg-1), Pb (423 mg kg-1), Cr (119 mg kg-1), Cu (99 mg kg-1), As (55 mg kg-1), Ni (39 mg kg-1), Co (18 mg kg-1), Sb (7.6 mg kg-1), Cd (2.6 mg kg-1), and Hg (0.22 mg kg-1). Except Ni, Co, and Cr, other elements in street dust were obviously elevated compared to the provincial soil background. Pb, Zn, Cd, Sb, and Cu were at heavy to moderate contamination status, especially Pb and Zn, with maximums of 1723 and 708 mg kg-1, respectively; As and Hg were slightly contaminated; while Cr, Ni, and Co were at un-contaminated levels. Multivariate statistical analysis revealed AZSA contributed to the increase of Pb, Zn, Cd, Sb, As, and Hg, while, natural sources introduced Ni, Co, Cr, and Cu. The health risk assessment disclosed that children had higher non-carcinogenic risk than those found in adults, and As has hazardous index (HI) higher than 1 both for children and adults, while Pb and Cr only had HIs higher than 1 for children, other elements were relatively safe. For carcinogenic risks, the major concern was As, then a lesser concern for Cr. The study showed that although the scale of AZSA was small, the contamination of heavy metal(loid)s in street dust and associated health risks were severe.
journal_name
Int J Environ Res Public Healthauthors
Wu T,Bi X,Li Z,Sun G,Feng X,Shang L,Zhang H,He T,Chen Jdoi
10.3390/ijerph14090961subject
Has Abstractpub_date
2017-08-25 00:00:00issue
9eissn
1661-7827issn
1660-4601pii
ijerph14090961journal_volume
14pub_type
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