期刊
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
卷 40, 期 6, 页码 2441-2452出版社
SPRINGER
DOI: 10.1007/s10653-018-0110-3
关键词
Trace metals; Road dust; Spatial variation; Health risk assessment
类别
资金
- National Natural Science Foundation of China [21607038]
- China Postdoctoral Science Foundation [2015M570629, 2016T90668]
- Scientific Research Starting Foundation [5101219170102]
- Science Foundation of Henan Normal University [5101219279007]
- Science and Technology Research Project of Henan Province [162102110090]
Concentrations of eight trace metals (TMs) in road dust (RD) (particles < 25 mu m) from urban areas of Xinxiang, China, were determined by inductively coupled plasma mass spectrometry. The geometric mean concentrations of Zn, Mn, Pb, As, Cu, Cr, Ni and Cd were 489, 350, 114, 101, 60.0, 39.7, 31.6, and 5.1 mg kg(-1), respectively. When compared with TM levels in background soil, the samples generally display elevated TM concentrations, except for Cr and Mn, and for Cd the enrichment value was 69.6. Spatial variations indicated TMs in RD from park path would have similar sources with main roads, collector streets and bypasses. Average daily exposure doses of the studied TMs were about three orders of magnitude higher for hand-to-mouth ingestion than dermal contact, and the exposure doses for children were 9.33 times higher than that for adults. The decreasing trend of calculated hazard indexes (HI) for the eight elements was As > Pb > Cr > Mn > Cd > Zn > Ni > Cu for both children and adults.
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