DOI: 10.1016/j.atmosenv.2017.05.005
Scopus记录号: 2-s2.0-85018448910
论文题名: Secondary organic aerosol from VOC mixtures in an oxidation flow reactor
作者: Ahlberg E ; , Falk J ; , Eriksson A ; , Holst T ; , Brune W ; H ; , Kristensson A ; , Roldin P ; , Svenningsson B
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 161 起始页码: 210
结束页码: 220
语种: 英语
英文关键词: Oxidation flow reactor
; Secondary organic aerosol
; SOA yield
; VOC mixtures
Scopus关键词: Aerosols
; Isoprene
; Mixtures
; Monoterpenes
; Organic compounds
; Oxidation
; Particle size
; Particle size analysis
; Shape memory effect
; Volatile organic compounds
; Chemical compositions
; Flow reactors
; Nucleation particles
; Scanning mobility particle sizer
; Secondary organic aerosols
; SOA yield
; VOC mixtures
; Volume concentration
; Atmospheric movements
; isoprene
; myrcene
; volatile organic compound
; aerosol
; chemical composition
; condensation
; isoprene
; oxidation
; particle size
; size distribution
; volatile organic compound
; Article
; controlled study
; flow
; mass
; oxidation
; particle size
; precursor
; priority journal
; reactor
; secondary organic aerosol
; time of flight mass spectrometry
; volume
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 atmospheric organic aerosol is a tremendously complex system in terms of chemical content. Models generally treat the mixtures as ideal, something which has been questioned owing to model-measurement discrepancies. We used an oxidation flow reactor to produce secondary organic aerosol (SOA) mixtures containing oxidation products of biogenic (α-pinene, myrcene and isoprene) and anthropogenic (m-xylene) volatile organic compounds (VOCs). The resulting volume concentration and chemical composition was measured using a scanning mobility particle sizer (SMPS) and a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS), respectively. The SOA mass yield of the mixtures was compared to a partitioning model constructed from single VOC experiments. The single VOC SOA mass yields with no wall-loss correction applied are comparable to previous experiments. In the mixtures containing myrcene a higher yield than expected was produced. We attribute this to an increased condensation sink, arising from myrcene producing a significantly higher number of nucleation particles compared to the other precursors. Isoprene did not produce much mass in single VOC experiments but contributed to the mass of the mixtures. The effect of high concentrations of isoprene on the OH exposure was found to be small, even at OH reactivities that previously have been reported to significantly suppress OH exposures in oxidation flow reactors. Furthermore, isoprene shifted the particle size distribution of mixtures towards larger sizes, which could be due to a change in oxidant dynamics inside the reactor. © 2017 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82635
Appears in Collections: 气候变化事实与影响
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作者单位: Centre for Environmental and Climate Research, Lund University, Sölvegatan 37, Lund, Sweden; Division of Nuclear Physics, Lund University, Box 118, Lund, Sweden; Ergonomics and Aerosol Technology, Lund University, Box 118, Lund, Sweden; Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, Lund, Sweden; Department of Meteorology, Pennsylvania State University, University Park, PA, United States; Department of Physics, University of Helsinki, P.O. Box 64, Helsinki, Finland
Recommended Citation:
Ahlberg E,, Falk J,, Eriksson A,et al. Secondary organic aerosol from VOC mixtures in an oxidation flow reactor[J]. Atmospheric Environment,2017-01-01,161