DOI: 10.1016/j.atmosenv.2014.01.054
Scopus记录号: 2-s2.0-84894378499
论文题名: Spatial distribution and risk assessment of metals in dust based on samples from nursery and primary schools of Xi'an, China
作者: Chen H ; , Lu X ; , Li L ; Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 88 起始页码: 172
结束页码: 182
语种: 英语
英文关键词: Dust
; Health risk
; Metals
; Nursery
; Primary school
; Spatial distribution
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: The spatial distribution of metal (Cu, Pb, Zn, As, Ba, Co, Cr, Mn, Ni and V) concentrations in urban dust of Xi'an, China was determined using the geographical information system method on dust from nursery and primary schools. The health risk of these metals in campus dust to children was assessed based on the EPA heath risk model. The results indicate elevated metal concentrations, especially of Cu, Pb, Zn, Co, Cr and Ba, which are 1.5-10.2, 2.6-73.0, 2.1-26.5, 2.0-10.9, 1.2-10.2 and 1.1-10.4 times the background values of Shaanxi soil, respectively. Pb, Cr, Cu and Ba have similar distribution patterns. The hot-spot areas of Pb, Zn, Cu, Co, Cr and Ba are mainly associated with industrial activities and heavy traffic. Their spatial distributions in the Xi'an urban dust indicated that these metals mainly originate from vehicles and industrial activities. For As, Mn, Ni and V, natural factors are important in controlling their distributions. Health risk assessment shows that ingestion is the largest exposure route of metals in dust from nursery and primary schools to children. The mean hazard indices for non-cancer risk of all analyzed metals due to campus dust are within the safe range, while the maximum hazard indices of Pb, Cr and As are close to, or slightly higher than, safe levels. The cancer risks of As, Co, Cr and Ni to nursery and primary school children, considering only inhalation, are within the acceptable range. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80681
Appears in Collections: 气候变化事实与影响
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作者单位: School of Tourism and Environment, Shaanxi Normal University, Xi'an 710062, China; Department of Civil Engineering, University of British Columbia, Vancouver V6T 1Z4, Canada
Recommended Citation:
Chen H,, Lu X,, Li L,et al. Spatial distribution and risk assessment of metals in dust based on samples from nursery and primary schools of Xi'an, China[J]. Atmospheric Environment,2014-01-01,88