Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California

doi:10.1016/j.atmosenv.2018.01.014

	Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California
	Masri, Shahir 1; Li, Lianfa 2,3; Dang, Andy 1; Chung, Judith H.4; Chen, Jiu-Chivan 3; Fan, Zhi-Hua (Tina)5; Wu, Jun 1
刊名	ATMOSPHERIC ENVIRONMENT
	2018-03-01
卷号	177 页码:175-186
关键词	Air pollution Polycyclic aromatic hydrocarbon Source Land-use regression Spatial model Thiessen polygons
ISSN号	1352-2310
DOI	10.1016/j.atmosenv.2018.01.014
通讯作者	Wu, Jun(junwu@uci.edu)
英文摘要	Airborne exposures to polycyclic aromatic hydrocarbons (PAHs) are associated with adverse health outcomes. Because personal air measurements of PAHs are labor intensive and costly, spatial PAH exposure models are useful for epidemiological studies. However, few studies provide adequate spatial coverage to reflect intra-urban variability of ambient PAHs. In this study, we collected 39-40 weekly gas-phase PAH samples in southern California twice in summer and twice in winter, 2009, in order to characterize PAH source contributions and develop spatial models that can estimate gas-phase PAH concentrations at a high resolution. A spatial mixed regression model was constructed, including such variables as roadway, traffic, land-use, vegetation index, commercial cooking facilities, meteorology, and population density. Cross validation of the model resulted in an R-2 of 0.66 for summer and 0.77 for winter. Results showed higher total PAH concentrations in winter. Pyrogenic sources, such as fossil fuels and diesel exhaust, were the most dominant contributors to total PAHs. PAH sources varied by season, with a higher fossil fuel and wood burning contribution in winter. Spatial autocorrelation accounted for a substantial amount of the variance in total PAH concentrations for both winter (56%) and summer (19%). In summer, other key variables explaining the variance included meteorological factors (9%), population density (15%), and roadway length (21%). In winter, the variance was also explained by traffic density (16%). In this study, source characterization confirmed the dominance of traffic and other fossil fuel sources to total measured gas-phase PAH concentrations while a spatial exposure model identified key predictors of PAH concentrations. Gas-phase PAH source characterization and exposure estimation is of high utility to epidemiologist and policy makers interested in understanding the health impacts of gas-phase PAHs and strategies to reduce emissions.
资助项目	National Institute of Environmental Health Sciences[NIEHS R21ES016379] ; Natural Science Foundation of China[41471376] ; Health Effects Institute[HEI 4787-RFA09-4110-3 WU]
WOS关键词	LAND-USE REGRESSION ; AIR-POLLUTION ; EPIDEMIOLOGIC RESEARCH ; ULTRAFINE PARTICLES ; PARTICULATE MATTER ; PERSONAL EXPOSURE ; ORGANIC-CARBON ; PREGNANCY ; AREAS ; FINE
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000428095500017
资助机构	National Institute of Environmental Health Sciences ; Natural Science Foundation of China ; Health Effects Institute
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/57364]
专题	中国科学院地理科学与资源研究所
通讯作者	Wu, Jun
作者单位	1.Univ Calif Irvine, Coll Hlth Sci, Program Publ Hlth, Irvine, CA 92697 USA 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing, Peoples R China 3.Univ Southern Calif, Dept Prevent Med, Los Angeles, CA 90009 USA 4.Univ Calif, Irvine Med Ctr, Orange, CA 92868 USA 5.New Jersey Dept Hlth, Environm & Chem Lab Serv, Ewing, NJ 08628 USA
推荐引用方式 GB/T 7714	Masri, Shahir,Li, Lianfa,Dang, Andy,et al. Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California[J]. ATMOSPHERIC ENVIRONMENT,2018,177:175-186.
APA	Masri, Shahir.,Li, Lianfa.,Dang, Andy.,Chung, Judith H..,Chen, Jiu-Chivan.,...&Wu, Jun.(2018).Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California.ATMOSPHERIC ENVIRONMENT,177,175-186.
MLA	Masri, Shahir,et al."Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California".ATMOSPHERIC ENVIRONMENT 177(2018):175-186.