DOI: 10.1016/j.atmosenv.2017.12.025
Scopus记录号: 2-s2.0-85043372117
论文题名: Molecular structure impacts on secondary organic aerosol formation from glycol ethers
作者: Li L ; , Cocker D ; R ; , III
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 180 起始页码: 206
结束页码: 215
语种: 英语
英文关键词: Consumer products
; Glycol ether
; HR-ToF-AMS
; Molecular structure
; NOX
; Photooxidation
; Secondary organic aerosol
Scopus关键词: Aerosols
; Atmospheric structure
; Carbon
; Chemical analysis
; Consumer products
; Cyclization
; Glycols
; Mobile power plants
; Molecular structure
; Nitrogen oxides
; Oxidation
; Photooxidation
; Volatile organic compounds
; Atmospheric conditions
; Chemical composition analysis
; Cyclization products
; Glycol ethers
; Oxidation conditions
; Regulatory agencies
; Secondary organic aerosols
; Tof-ams
; Ethers
; carbonyl derivative
; ether derivative
; glycol
; methyl group
; volatile agent
; accelerator mass spectrometry
; aerosol
; aerosol composition
; aerosol formation
; anthropogenic effect
; commodity
; ether
; experimental study
; molecular analysis
; nitrogen oxides
; photooxidation
; solvent
; urban atmosphere
; volatile organic compound
; aerosol
; Article
; chemical composition
; chemical structure
; cyclization
; fragmentation reaction
; gas
; photooxidation
; physical phase
; precursor
; priority journal
; secondary organic aerosol
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: Glycol ethers, a class of widely used solvents in consumer products, are often considered exempt as volatile organic compounds based on their vapor pressure or boiling points by regulatory agencies. However, recent studies found that glycol ethers volatilize at ambient conditions nearly as rapidly as the traditional high-volatility solvents indicating the potential of glycol ethers to form secondary organic aerosol (SOA). This is the first work on SOA formation from glycol ethers. The impact of molecular structure, specifically –OH, on SOA formation from glycol ethers and related ethers are investigated in the work. Ethers with and without –OH, with methyl group hindrance on –OH and with –OH at different location are studied in the presence of NOX and under “NOX free” conditions. Photooxidation experiments under different oxidation conditions confirm that the processing of ethers is a combination of carbonyl formation, cyclization and fragmentation. Bulk SOA chemical composition analysis and oxidation products identified in both gas and particle phase suggests that the presence and location of –OH in the carbon bond of ethers determine the occurrence of cyclization mechanism during ether oxidation. The cyclization is proposed as a critical SOA formation mechanism to prevent the formation of volatile compounds from fragmentation during the oxidation of ethers. Glycol ethers with –CH2–O–CH2CH2OH structure is found to readily form cyclization products, especially with the presence of NOx, which is more relevant to urban atmospheric conditions than without NOx. Glycol ethers are evaluated as dominating SOA precursors among all ethers studied. It is estimated that the contribution of glycol ethers to anthropogenic SOA is roughly 1% of the current organic aerosol from mobile sources. The contribution of glycol ethers to anthropogenic SOA is roughly 1% of the current organic aerosol from mobile sources and will play a more important role in future anthropogenic SOA formation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82919
Appears in Collections: 气候变化事实与影响
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作者单位: University of California, Riverside, Department of Chemical and Environmental Engineering, Riverside, CA, United States; College of Engineering-Center for Environmental Research and Technology (CE-CERT), Riverside, CA, United States
Recommended Citation:
Li L,, Cocker D,R,et al. Molecular structure impacts on secondary organic aerosol formation from glycol ethers[J]. Atmospheric Environment,2018-01-01,180