DOI: 10.1016/j.atmosenv.2017.03.019
Scopus记录号: 2-s2.0-85015764322
论文题名: Secondary organic aerosol formation from propylene irradiations in a chamber study
作者: Ge S ; , Xu Y ; , Jia L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 157 起始页码: 146
结束页码: 155
语种: 英语
英文关键词: Liquid water content
; Propylene
; Ratio of C3H6/NOx
; Secondary organic aerosols
Scopus关键词: Aerosols
; Ethylene
; Irradiation
; Liquids
; Propylene
; Concentration ratio
; Liquid phase mechanism
; Liquid water content
; Low molecular weight
; NaCl concentration
; Ratio of C<sub>3</sub>H<sub>6</sub>/NO<sub>x</sub>
; Secondary organic aerosols
; Sodium chloride (NaCl)
; Sodium chloride
; ester
; hydroperoxide
; organic nitrate
; propylene
; sodium chloride
; aerosol formation
; concentration (composition)
; experimental study
; flux chamber
; indoor air
; irradiation
; nitrogen oxides
; organic compound
; water content
; Article
; irradiation
; liquid
; mass spectrometry
; photochemistry
; priority journal
; secondary organic aerosol
; water content
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: Some studies have shown that low-molecular-weight VOCs such as ethylene and acetylene can form SOA. However, so far propylene (C3H6) has not been studied. The current work systematically investigates irradiations of propylene in the presence of NOx (x = 1, 2) in a self-made indoor chamber. Only a small amount of secondary organic aerosols (SOA) was formed under 5% and 80% RH conditions without sodium chloride (NaCl) seed particles or in the presence of solid NaCl. When NaCl was in the form of droplets, liquid water content (LWC) increased from 34.5 to 169.8 μg m−3 under different initial NaCl concentrations, and correspondingly the amount of SOA linearly increased from 5.9 to 29.8 μg m−3 (SOA = 0.0164 × LWC+1.137, R2 = 0.97) at the C3H6/NOx ratio of 32.2–44.9 (ppbC/ppb). The initial C3H6/NOx concentration ratio considerably impacted the formation of SOA, in which the amount of SOA increased from 12.1 to 47.9 μg m−3 exponentially as the ratio decreased from 46.5 to 6.3 with an important point of the ratio value of 11. At the ratio of less than 11 in the regime under the control of C3H6, SOA concentrations decreased considerably with increasing ratio, whereas at the ratio value of larger than 11 in the NOx controlled regime, SOA slightly decreased with increasing ratio. From combination of the analysis of different functional groups of particles by IR spectra and ESI-Exactive-Orbitrap mass spectrometer, the constituents of SOA were identified to be hydroperoxides (e.g. HOCH2CCl(CH3)OOH), esters (e.g. CH2ClC(O)OCHClCHO), organic nitrates (e.g. HO2CH(CH2Cl)C(O)OCCl(CH2Cl)C(O)OCHClCH2ONO2), etc. Furthermore, a liquid-phase mechanism of SOA formation has been proposed in this study. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82674
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Atmospheric Chemistry and Environmental Sciences, College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Ge S,, Xu Y,, Jia L. Secondary organic aerosol formation from propylene irradiations in a chamber study[J]. Atmospheric Environment,2017-01-01,157