DOI: 10.1016/j.atmosenv.2014.07.035
Scopus记录号: 2-s2.0-84904417307
论文题名: Proposed chemical mechanisms leading to secondary organic aerosol in the reactions of aliphatic amines with hydroxyl and nitrate radicals
作者: Price D ; J ; , Clark C ; H ; , Tang X ; , Cocker D ; R ; , Purvis-Roberts K ; L ; , Silva P ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 96 起始页码: 135
结束页码: 144
语种: 英语
英文关键词: Amine
; Mass spectrometry
; Mechanism
; Oligomer formation
; Peroxy radical
Scopus关键词: Aerosols
; Amines
; Atmospheric chemistry
; Environmental chambers
; Mass spectrometers
; Mass spectrometry
; Mechanisms
; Oligomers
; Reaction kinetics
; Salts
; Atmospheric oxidation
; Atmospheric reaction mechanisms
; Chemical compositions
; Oligomer formations
; Peroxy radicals
; Secondary organic aerosols
; Selected ion flow tubes
; Time-of-flight mass spectrometers
; Atmospheric movements
; alcohol
; aldehyde
; aliphatic amine
; hydrogen
; hydroxyl radical
; nitrate
; nitrogen
; oxygen
; peroxy radical
; aerosol composition
; aliphatic hydrocarbon
; atmospheric chemistry
; atmospheric pollution
; chemical composition
; hydroxyl radical
; mass spectrometry
; nitrate
; peroxy radical
; article
; atmosphere
; chemical composition
; chemical reaction
; chemical structure
; electron
; gas
; ionization
; mass spectrometry
; molecular weight
; molecule
; oligomerization
; oxidation
; photolysis
; photooxidation
; priority journal
; reaction analysis
; 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: The presence and importance of amines in the atmosphere, including aliphatic amines, continues to gain more attention. The atmospheric reaction mechanisms of these amines with key atmospheric radicals are important to predict both daytime and nighttime atmospheric chemistry. While previous studies have focused on the production of amine salts, this analysis looks at the importance of peroxy radical reactions to the formation of secondary organic aerosol. Atmospheric oxidation mechanisms are presented to explain the observed chemistry. A series of environmental chamber experiments were conducted in which aliphatic tertiary and secondary amines were reacted with either hydroxyl radical (OH) or nitrate radical (NO3). Chemical composition of the aerosol products was obtained with a High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS) and a Particle Into Liquid Sampler Time of Flight Mass Spectrometer (PILS-ToF-MS), while the chemical composition of the gas-phase products was obtained with a Selected Ion Flow Tube Mass Spectrometer (SIFT-MS). A number of aerosol-phase mass spectra showed highly oxidized fragments at a much higher molecular weight (MW) than the amine precursor. It is proposed that these larger compounds are oligomers formed through peroxy radical reactions with hydrogen rearrangement. Another reaction pathway observed was the formation of amine salts. The relative importance of each pathway to the overall production of aerosol is found to be dependent on the type of amine and oxidant. For example, the oligomers were observed in the tertiary methyl amines, while the formation of amine salts was more prevalent in the secondary and tertiary ethyl amines. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81205
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, United States; Bourns College of Engineering, Center for Environmental Research and Technology, University of California, Riverside, CA 92507, United States; Claremont McKenna, Pitzer, and Scripps Colleges, W.M. Keck Science Department, Claremont, CA 91711, United States; United States Department of Agriculture - Agricultural Research Service, Bowling Green, KY 42104, United States; Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720, United States
Recommended Citation:
Price D,J,, Clark C,et al. Proposed chemical mechanisms leading to secondary organic aerosol in the reactions of aliphatic amines with hydroxyl and nitrate radicals[J]. Atmospheric Environment,2014-01-01,96