Fine road dust contamination in a mining area presents a likely air pollution hotspot and threat to human health

doi:10.1016/j.envint.2019.04.050

	Fine road dust contamination in a mining area presents a likely air pollution hotspot and threat to human health
	Tian, Shuhan ; Liang, Tao ; Li, Kexin
刊名	ENVIRONMENT INTERNATIONAL
	2019-07-01
卷号	128 页码:201-209
关键词	Road dust Rare earth elements Mining contamination Health risk
ISSN号	0160-4120
DOI	10.1016/j.envint.2019.04.050
通讯作者	Liang, Tao(liangt@igsnrr.ac.cn)
英文摘要	The road dust found in mining areas is composed of dust from multiple sources, including wind transported mineral dust from mines and tailings as well as uncovered trucks leakage. Collectively, these are then distributed via wind and traffic activity, becoming an important source of particulate matter (PM) and subsequently inhaled by pedestrians. A common practice in previous road dust risk assessments has regarded them as soil, which likely led to a significant underestimation of the actual inhaled amount. To more accurately understand the inhalation risk presented by road dust in mining areas, the study applied a detailed pollution analysis and dust dispersion model to assess the inhaled amount of road dust. Road dust samples located at different distances to the mine and tailings were collected and sieved to 10 mu m (RD10). Enrichment factors (EFs) of Ce, As, Cd, and Mo exceeded 20 across most sampled sites, suggesting extreme pollution. Source analysis indicated that most of the collected RD10 had greater than half of its mass originating from the mine. To assess the risk presented by inhalation exposure to local populations, we built a method using Gaussian diffusion model and two exposure scenarios for both adults and children were considered. The level of simulated particle concentrations was comparable to that described in the literature; the inhalation of potential toxic elements (PTEs) in RD10 led to health risks for both adults and children (adult and child HI > 1, with adults CR in industrial areas > 10(-4)). Results also indicated that a ten-fold reduction of silt load resulted in a > 4-fold decrease in risk. Collectively, the results suggest that fine road dust is a potential hotspot for mineral exposure in populations living around a mine and its tailings; moreover, that effective prevention measures like road cleaning and truck regulation are urgently needed.
资助项目	National Natural Science Foundation of China[41571473] ; National Natural Science Foundation of China[41401591]
WOS关键词	RARE-EARTH-ELEMENTS ; POTENTIALLY TOXIC ELEMENTS ; HEAVY-METALS ; PARTICULATE MATTER ; RISK-ASSESSMENT ; SOURCE APPORTIONMENT ; DEPOSITED SEDIMENTS ; URBAN-ENVIRONMENT ; TRACE-METALS ; STREET DUST
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000467938500023
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/59619]
专题	中国科学院地理科学与资源研究所
通讯作者	Liang, Tao
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
推荐引用方式 GB/T 7714	Tian, Shuhan,Liang, Tao,Li, Kexin. Fine road dust contamination in a mining area presents a likely air pollution hotspot and threat to human health[J]. ENVIRONMENT INTERNATIONAL,2019,128:201-209.
APA	Tian, Shuhan,Liang, Tao,&Li, Kexin.(2019).Fine road dust contamination in a mining area presents a likely air pollution hotspot and threat to human health.ENVIRONMENT INTERNATIONAL,128,201-209.
MLA	Tian, Shuhan,et al."Fine road dust contamination in a mining area presents a likely air pollution hotspot and threat to human health".ENVIRONMENT INTERNATIONAL 128(2019):201-209.