DOI: 10.1016/j.atmosenv.2016.11.047
Scopus记录号: 2-s2.0-84997343269
论文题名: Secondary organic aerosol formation from photo-oxidation of toluene with NOx and SO2: Chamber simulation with purified air versus urban ambient air as matrix
作者: Deng W ; , Liu T ; , Zhang Y ; , Situ S ; , Hu Q ; , He Q ; , Zhang Z ; , Lü S ; , Bi X ; , Wang X ; , Boreave A ; , George C ; , Ding X ; , Wang X
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 150 起始页码: 67
结束页码: 76
语种: 英语
英文关键词: Ambient air
; Chamber simulation
; Matrix effect
; Particle acidity
; Purified air
; Secondary organic aerosols
; Sulfate
; Toluene
Scopus关键词: Aerosols
; Degradation
; Free radicals
; Oxidation
; Ozone
; Purification
; Sulfur dioxide
; Toluene
; Ambient air
; Chamber simulation
; Matrix effects
; Secondary organic aerosols
; Sulfate
; Air purification
; alkene
; nitrogen oxide
; sulfur dioxide
; toluene
; acidity
; aerosol
; ambient air
; hydroxyl radical
; photodegradation
; photooxidation
; simulation
; sulfate
; sulfur dioxide
; toluene
; acidity
; air quality
; ambient air
; Article
; comparative study
; ozonolysis
; photooxidation
; priority journal
; purified air
; secondary organic aerosol
; surface property
; urban area
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: Chamber studies on the formation of secondary aerosols are mostly performed with purified air as matrix, it is of wide concern in what extent they might be different from the situations in ambient air, where a variety of gaseous and particulate components preexist. Here we compared the photo-oxidation of “toluene + NOx + SO2” combinations in a smog chamber in real urban ambient air matrix with that in purified air matrix. The secondary organic aerosols (SOA) mass concentrations and yields from toluene in the ambient air matrix, after subtracted ambient air background primary and secondary organic aerosols, were 9.0–34.0 and 5.6–12.9 times, respectively, greater than those in purified air matrix. Both homogeneous and heterogeneous oxidation of SO2 were enhanced in ambient air matrix experiments with observed 2.0–7.5 times higher SO2 degradation rates and 2.6–6.8 times faster sulfate formation than that in purified air matrix, resulting in higher in-situ particle acidity and consequently promoting acid-catalyzed SOA formation. In the ambient air experiments although averaged OH radical levels were elevated probably due to heterogeneous formation of OH on particle surface and/or ozonolysis of alkenes, non-OH oxidation pathways of SO2 became even more dominating. Under the same organic aerosol mass concentration, the SOA yields of toluene in purified air matrix experiments matched very well with the two-product model curve by Ng et al. (2007), yet the yields in ambient air on average was over two times larger. The results however were much near the best fit curve by Hildebrandt et al. (2009) with the volatility basis set (VBS) approach. © 2016 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82268
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China; School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, China; Institut de Recherches sur la Catalyse et l'Environment de Lyon (IRCELYON), CNRS, UMR5256, Villeurbanne, France
Recommended Citation:
Deng W,, Liu T,, Zhang Y,et al. Secondary organic aerosol formation from photo-oxidation of toluene with NOx and SO2: Chamber simulation with purified air versus urban ambient air as matrix[J]. Atmospheric Environment,2017-01-01,150