Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California
文献类型：期刊论文
| 作者 | Masri, Shahir1; Li, Lianfa2,3 ; Dang, Andy1; Chung, Judith H.4; Chen, Jiu-Chivan3; Fan, Zhi-Hua (Tina)5; Wu, Jun1
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| 刊名 | ATMOSPHERIC ENVIRONMENT
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| 出版日期 | 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. |
| WOS关键词 | LAND-USE REGRESSION ; AIR-POLLUTION ; EPIDEMIOLOGIC RESEARCH ; ULTRAFINE PARTICLES ; PARTICULATE MATTER ; PERSONAL EXPOSURE ; ORGANIC-CARBON ; PREGNANCY ; AREAS ; FINE |
| 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研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000428095500017 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Institute of Environmental Health Sciences ; Natural Science Foundation of China ; Health Effects Institute |
| 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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