DOI: 10.1016/j.atmosenv.2018.01.014
Scopus记录号: 2-s2.0-85041453939
论文题名: Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California
作者: Masri S ; , Li L ; , Dang A ; , Chung J ; H ; , Chen J ; -C ; , Fan Z ; -H ; T ; , Wu J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 177 起始页码: 175
结束页码: 186
语种: 英语
英文关键词: Air pollution
; Land-use regression
; Polycyclic aromatic hydrocarbon
; Source
; Spatial model
; Thiessen polygons
Scopus关键词: Air pollution
; Aromatic compounds
; Aromatic hydrocarbons
; Aromatization
; Characterization
; Fossil fuels
; Fuels
; Gas emissions
; Gases
; Hydrocarbons
; Land use
; Population distribution
; Population dynamics
; Population statistics
; Regression analysis
; Epidemiological studies
; Land use regression
; Polycyclic aromatic hydrocarbon (PAH)
; Polycyclic aromatic hydrocarbons (PAHS)
; Source
; Spatial autocorrelations
; Spatial modeling
; Thiessen polygons
; Polycyclic aromatic hydrocarbons
; acenaphthene
; acenaphthylene
; anthracene
; fluoranthene
; fluorene
; fossil fuel
; naphthalene
; phenanthrene
; polycyclic aromatic hydrocarbon
; pyrene
; air pollution
; ambient air
; Article
; California
; combustion
; concentration process
; controlled study
; cooking
; environmental exposure
; exhaust gas
; gas
; highway
; human
; land use
; meteorological phenomena
; meteorology
; population density
; priority journal
; seasonal variation
; spatiotemporal analysis
; summer
; traffic
; vegetation
; winter
; wood
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: 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 R2 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. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83041
Appears in Collections: 气候变化事实与影响
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作者单位: Program in Public Health, College of Health Sciences, University of California, Irvine, CA, United States; State Key Laboratory of Resources and Environmental Information System, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Department of Preventive Medicine, University of Southern California, Los Angeles, CA, United States; University of California, Irvine Medical Center, Orange, CA, United States; New Jersey Department of Health, Environmental and Chemical Laboratory Services, Ewing, NJ, United States
Recommended Citation:
Masri S,, Li L,, Dang A,et al. Source characterization and exposure modeling of gas-phase polycyclic aromatic hydrocarbon (PAH) concentrations in Southern California[J]. Atmospheric Environment,2018-01-01,177