DOI: 10.1016/j.atmosenv.2018.02.035
Scopus记录号: 2-s2.0-85042436760
论文题名: Measurements of gas and particle polycyclic aromatic hydrocarbons (PAHs) in air at urban, rural and near-roadway sites
作者: Pratt G ; C ; , Herbrandson C ; , Krause M ; J ; , Schmitt C ; , Lippert C ; J ; , McMahon C ; R ; , Ellickson K ; M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 179 起始页码: 268
结束页码: 278
语种: 英语
英文关键词: Air measurements
; Gas-particle partitioning
; PAH
; Polycyclic aromatic hydrocarbons
Scopus关键词: Aromatic compounds
; Aromatic hydrocarbons
; Aromatization
; Gases
; Hydrocarbons
; Particle size
; Urban growth
; Ambient conditions
; Gas-particle partitioning
; Gas-phase concentration
; High-volume sampler
; Non-linear regression
; Octanol air-partition
; Polycyclic aromatic hydrocarbons (PAHS)
; Quartz fiber filters
; Polycyclic aromatic hydrocarbons
; polycyclic aromatic hydrocarbon
; absorption
; adsorption
; aerosol
; air pollutant
; airborne particle
; ambient air
; Article
; concentration (parameters)
; environmental exposure
; gas
; highway
; model
; particle size
; pollution monitoring
; priority journal
; rural area
; soot
; urban area
; vapor pressure
; Acacia koa
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: We measured polycyclic aromatic hydrocarbons (PAHs) in gas and particle phases over two years using high volume samplers equipped with quartz fiber filters and XAD-4 at a rural site, an urban site, and a site adjacent to a heavily trafficked roadway. Overall results were generally as expected, in that concentrations increased from rural to urban to near-roadway sites, and PAHs with high vapor pressures (liquid subcooled, Po L) and low octanol-air partition coefficients (Koa) were mainly in the gas phase, while those with low Po L and high Koa were predominantly in the particle phase. Intermediate PAHs existed in both phases with the phase distribution following a seasonal pattern of higher gas phase concentrations in summer due to temperature effects. The overall pattern of phase distribution was consistent with PAH properties and ambient conditions and was similar at all three sites. The particle-bound fraction (ϕ) was well-described empirically by nonlinear regressions with log Koa and log Po L as predictors. Adsorption and absorption models underestimated the particle-bound fraction for most PAHs. The dual aerosol-air/soot-air model generally represented the gas-particle partitioning better than the other models across all PAHs, but there was a tendency to underestimate the range in the particle-bound fraction seen in measurements. There was a statistically insignificant tendency for higher PAHs in the particle phase at the near roadway site, and one piece of evidence that PAHs may be enriched on ultrafine particles at the near roadway site. Understanding the phase and particle size distributions of PAHs in highly polluted, high exposure microenvironments near traffic sources will help shed light on potential health effects. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82987
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: University of Minnesota, School of Public Health, Division of Environmental Health, Minneapolis, MN, United States; Environmental Health, Minnesota Department of Health, St. Paul, MN, United States; Public Health Laboratory, Minnesota Department of Health, St. Paul, MN, United States; Department of Natural Resources and the Environment, Mille Lacs Band of Ojibwe, Onamia, MN, United States; Environmental Analysis and Outcomes, Minnesota Pollution Control Agency, Duluth, MN, United States
Recommended Citation:
Pratt G,C,, Herbrandson C,et al. Measurements of gas and particle polycyclic aromatic hydrocarbons (PAHs) in air at urban, rural and near-roadway sites[J]. Atmospheric Environment,2018-01-01,179