DOI: 10.1016/j.atmosenv.2014.02.013
Scopus记录号: 2-s2.0-84895758151
论文题名: Characterization of chemical composition and concentration of fine particulate matter during a transit strike in Ottawa, Canada
作者: Ding L ; , Chan T ; W ; , Ke F ; , Wang D ; K ; W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 89 起始页码: 433
结束页码: 442
语种: 英语
英文关键词: Elemental carbon
; Hopanes
; Number size distribution
; Organic carbon
; Polycyclic aromatic hydrocarbon
; Steranes
Scopus关键词: Air quality
; Mass transportation
; Organic carbon
; Polycyclic aromatic hydrocarbons
; Size distribution
; Traffic surveys
; Elemental carbon
; Hopanes
; Nucleation mode particles
; Number size distribution
; Particle number concentration
; Particle number size distribution
; Polycyclic aromatic hydrocarbons (PAHS)
; Steranes
; Carbon
; benzo[a]pyrene
; carbon
; gasoline
; organic carbon
; polycyclic aromatic hydrocarbon
; prednisolone
; aerosol composition
; air quality
; alkane
; atmospheric pollution
; carbon
; carcinogen
; concentration (composition)
; nucleation
; PAH
; particulate matter
; size distribution
; traffic emission
; air pollution control
; air quality
; article
; Canada
; chemical composition
; concentration (parameters)
; molecular weight
; motor vehicle
; particle size
; particulate matter
; priority journal
; Canada
; Ontario [Canada]
; Ottawa
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: From December 10, 2008 to February 9, 2009, a strike stopped the public transit services in Ottawa, Ontario, Canada. To understand the changes in air quality associated with the transit strike, the chemical composition and concentration of the fine particulate matter with diameters less than 2.5 microns (PM2.5), collected before, during, and after the transit strike period, were evaluated. The collected PM2.5 samples were analyzed to determine the particulate matter mass, the levels of organic carbon (OC) and elemental carbon (EC), as well as the particulate non-polar semi-volatiles, e.g., polycyclic aromatic hydrocarbons (PAHs), hopanes, and steranes. Particle number size distributions measured during and after the transit strike period were also compared. Results indicated that duringtransit strike months, particle number size distributions were entirely dominated by nucleation mode particles leading to an increase in total particle number concentration by about 79%. In addition, particulate matter, organic carbon, and elemental carbon mass concentrations also increased by over 100%. The average total PAH levels during the strike months were higher by a factor of about 7. Elevated concentrations of high molecular weight PAHs (i.e., PAH with 5 and 6 rings) observed during the strike months suggested that there were more gasoline-powered vehicles on the roads over that period. The level of carcinogenic benzo[a]pyrene was higher by a factor of 5. Mass concentrations of hopanes and steranes were 30-98% higher during the strike months than non-strike months and exhibited strong correlations with EC suggesting the primary origin of these compounds. These results indicated that the increased traffic volume due to the passenger vehicles and the change in driving pattern during the transit strike period reduced the local air quality. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81195
Appears in Collections: 气候变化事实与影响
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作者单位: Air Quality Research Division, Environment Canada, 335 River Road, Ottawa, ON K1A 0H3, Canada
Recommended Citation:
Ding L,, Chan T,W,et al. Characterization of chemical composition and concentration of fine particulate matter during a transit strike in Ottawa, Canada[J]. Atmospheric Environment,2014-01-01,89