DOI: 10.1016/j.atmosenv.2017.01.010
Scopus记录号: 2-s2.0-85008930061
论文题名: Effects of inorganic seed aerosols on the particulate products of aged 1,3,5-trimethylbenzene secondary organic aerosol
作者: Huang M ; , Hao L ; , Cai S ; , Gu X ; , Zhang W ; , Hu C ; , Wang Z ; , Fang L ; , Zhang W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 152 起始页码: 490
结束页码: 502
语种: 英语
英文关键词: 1,3,5-trimethylbenzene
; Aerosol mass spectrometry
; Aging mechanisms
; Inorganic seed aerosols
; Secondary organic aerosol
Scopus关键词: Aromatic compounds
; Irradiation
; Mass spectrometers
; Mass spectrometry
; Organic lasers
; Photooxidation
; 1 ,3 ,5-Trimethylbenzene
; Aerosol mass spectrometry
; Aging mechanism
; Heterogeneous reactions
; Hygroscopic properties
; Imidazole derivatives
; Secondary organic aerosols
; Time-of-flight mass spectrometers
; Aerosols
; 1,3,5 trimethylbenzene
; acetaldehyde
; acetic acid
; formic acid
; hydroxyl radical
; imidazole derivative
; lactic acid
; nitrate
; organic compound
; ozone
; phenol derivative
; pyruvic acid
; aerosol
; aging
; benzene
; irradiation
; mass spectrometry
; nitrogen
; particulate matter
; photooxidation
; reaction kinetics
; water content
; Article
; fuzzy system
; mass spectrometry
; nitration
; nonhuman
; photooxidation
; plant seed
; priority journal
; reaction analysis
; secondary organic aerosol
; time of flight mass spectrometry
; ultraviolet irradiation
; 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: Inorganic aerosols such as (NH4)2SO4, NaNO3and CaCl2are commonly present in the Chinese urban atmosphere. They could significantly affect the formation and aging of ambient secondary organic aerosols (SOA), but the underlying mechanisms remain unknown. In this work we studied SOA formation from the photooxidation reaction of 1,3,5-trimethylbenzene (135-TMB) with 100 μg/m3of the above three types of inorganic aerosols as seeds in a laboratory chamber. We focused on the aging products of SOA particles by exposing them to high levels of oxidizing hydroxyl radicals (OH). The particulate products of SOA were measured using an aerosol laser time-of-flight mass spectrometer (ALTOFMS) and Fuzzy C-Means (FCM) were applied to organic mass spectra for clustering. In the presence of (NH4)2SO4seeds, 4-methyl-1H-imidazole, 4-methyl-imidazole-2-acetaldehyde and other imidazole derivative compounds formed from reactions of NH4+with methylglyoxal were detected as new aged products. We also observed aromatic nitrogen-containing organic compounds as the major aged products in the presence of NaNO3seeds as a consequence of reaction with OH and NO2radicals, which were generated by UV irradiation of acidic aqueous nitrate, inducing nitration reactions with phenolic compounds. As CaCl2has the strongest hygroscopic properties of the three salt particles tested, the greater water content on the surface of the aerosol may facilitate the condensing of more gas-phase organic acid products to the hygroscopic CaCl2seeds, forming H+ions that catalyze the heterogeneous reaction of aldehydes, products of photooxidation of 135-TMB, and forming high-molecular-weight (HMW) compounds. These results provide new insight into the aromatic SOA aging mechanisms. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82370
Appears in Collections: 气候变化事实与影响
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作者单位: Fujian Provincial Key Laboratory of Modern Analytical Science and Separation Technology, College of Chemistry and Environment, Minnan Normal University, Zhangzhou, China; Department of Applied Physics, University of Eastern Finland, Kuopio, Finland; Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China
Recommended Citation:
Huang M,, Hao L,, Cai S,et al. Effects of inorganic seed aerosols on the particulate products of aged 1,3,5-trimethylbenzene secondary organic aerosol[J]. Atmospheric Environment,2017-01-01,152