IGSNRR OpenIR
Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California
Masri, Shahir1; Li, Lianfa2,3; Dang, Andy1; Chung, Judith H.4; Chen, Jiu-Chivan3; Fan, Zhi-Hua (Tina)5; Wu, Jun1
2018-03-01
Source PublicationATMOSPHERIC ENVIRONMENT
ISSN1352-2310
Volume177Pages:175-186
Corresponding AuthorWu, Jun(junwu@uci.edu)
AbstractAirborne 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.
KeywordAir pollution Polycyclic aromatic hydrocarbon Source Land-use regression Spatial model Thiessen polygons
DOI10.1016/j.atmosenv.2018.01.014
WOS KeywordLAND-USE REGRESSION ; AIR-POLLUTION ; EPIDEMIOLOGIC RESEARCH ; ULTRAFINE PARTICLES ; PARTICULATE MATTER ; PERSONAL EXPOSURE ; ORGANIC-CARBON ; PREGNANCY ; AREAS ; FINE
Indexed BySCI
Language英语
Funding ProjectNational Institute of Environmental Health Sciences[NIEHS R21ES016379] ; Natural Science Foundation of China[41471376] ; Health Effects Institute[HEI 4787-RFA09-4110-3 WU]
Funding OrganizationNational Institute of Environmental Health Sciences ; Natural Science Foundation of China ; Health Effects Institute
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000428095500017
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57365
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWu, Jun
Affiliation1.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
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Masri, Shahir]'s Articles
[Li, Lianfa]'s Articles
[Dang, Andy]'s Articles
Baidu academic
Similar articles in Baidu academic
[Masri, Shahir]'s Articles
[Li, Lianfa]'s Articles
[Dang, Andy]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Masri, Shahir]'s Articles
[Li, Lianfa]'s Articles
[Dang, Andy]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.