DOI: 10.1016/j.atmosenv.2015.08.088
Scopus记录号: 2-s2.0-84941284687
论文题名: Stability of polycyclic aromatic compounds in polyurethane foam-type passive air samplers upon O3 exposure
作者: Jariyasopit N ; , Liu Y ; , Liggio J ; , Harner T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 120 起始页码: 200
结束页码: 204
语种: 英语
英文关键词: Alkylated PACs
; Flow tube chamber
; Ozone exposure
; PACs
; Passive air sampling
; PUF disk
Scopus关键词: Aromatic compounds
; Aromatic hydrocarbons
; Aromatization
; Polyurethanes
; Rigid foamed plastics
; Stability
; Alkylated PACs
; Flow tube
; Ozone exposures
; PACs
; Passive air samplings
; Puf disks
; Polycyclic aromatic hydrocarbons
; acenaphthylene
; anthracene
; ozone
; perylene
; polycyclic aromatic compound
; polycyclic aromatic hydrocarbon
; polyurethan foam
; thiophene derivative
; air sampling
; ambient air
; concentration (composition)
; foam
; ozone
; PAH
; pollution exposure
; relative humidity
; sampler
; air sampler
; air sampling
; alkylation
; ambient air
; Article
; controlled study
; environmental exposure
; humidity
; molecular stability
; priority journal
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: Stability of polycyclic aromatic compounds (PACs) in polyurethane foam (PUF) disks upon O3 exposure was studied in a flow tube. A wide range of PACs was evaluated by spiking PUF disks with PACs and exposing to O3 at concentrations that were equivalent to two months exposure, a typical deployment period for these passive air samplers. Ambient concentrations of O3 (~50 ppb) at 0% and 50% relative humidity (RH) were applied. At 0% RH, 23 of 68 PACs yielded more than 50% loss after exposure. The mean percent loss was 30% with perylene and 9,10-dimethylanthracene the most reactive polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs, respectively. At 50% RH, 77% of the studied PACs was stable upon O3 exposure (PACexposed/PACunexposed > 0.7). The mean percent loss was 17% and only 7 of 68 PACs yielded greater than 50% loss. In general, the reactivity of most of the PACs decreased at higher RH, except for the reactive PAHs (acenaphthylene, 2,3-dimethylanthracene, 9,10-dimethylanthracene, dibenzothiophene, and 2-methyldibenzothiophene) which demonstrated lower RH dependence. The experimental conditions in this study represent a worst case scenario for the stability of PACs sorbed to PUF. In reality, the sampling of PACs in ambient air represents an 'aged' component of PACs where the most reactive species have already partially been removed. Also, PACs in ambient air will be associated with the particle phase to varying extents that will help to enhance their stability. Therefore, under regular operating conditions, over a 2-month exposure, we expect a minimal error in the measurement of total concentration of PACs in air using the PUF disk passive sampler. © 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81480
Appears in Collections: 气候变化事实与影响
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作者单位: Air Quality Processes Research Section, Environment Canada, Toronto, ON, Canada; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Jariyasopit N,, Liu Y,, Liggio J,et al. Stability of polycyclic aromatic compounds in polyurethane foam-type passive air samplers upon O3 exposure[J]. Atmospheric Environment,2015-01-01,120