DOI: 10.1016/j.atmosenv.2017.03.042
Scopus记录号: 2-s2.0-85014546269
论文题名: Volatility of source apportioned wintertime organic aerosol in the city of Athens
作者: Louvaris E ; E ; , Florou K ; , Karnezi E ; , Papanastasiou D ; K ; , Gkatzelis G ; I ; , Pandis S ; N
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 158 起始页码: 138
结束页码: 147
语种: 英语
英文关键词: Source apportionment
; Thermodenuder
; Volatility
Scopus关键词: Aerosols
; Enthalpy
; Factorization
; Organic compounds
; Vaporization
; Volatile organic compounds
; Accommodation coefficients
; Positive Matrix Factorization
; Semivolatile compounds
; Source apportionment
; Thermodenuder
; Vaporization enthalpies
; Volatility
; Volatility distribution
; Factor analysis
; hydrocarbon
; volatile organic compound
; aerosol
; analytical framework
; biomass burning
; enthalpy
; equipment
; source apportionment
; urban area
; volatile organic compound
; winter
; aerosol
; analytical equipment
; Article
; biomass
; combustion
; enthalpy
; Greece
; mass spectrometer
; mass spectrometry
; priority journal
; thermodenuder
; vaporization
; winter
; Athens [Attica]
; Attica
; Greece
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 volatility distribution of ambient organic aerosol (OA) and its components was measured during the winter of 2013 in the city of Athens combining a thermodenuder (TD) and a High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS). Positive Matrix Factorization (PMF) analysis of both the ambient and the thermodenuder AMS-spectra resulted in a four-factor solution for the OA, namely: hydrocarbon-like OA (HOA), biomass burning OA (BBOA), cooking OA (COA), and oxygenated OA (OOA). The thermograms of the four factors were analyzed and the corresponding volatility distributions were estimated using the volatility basis set (VBS). All four factors included compounds with a wide range of effective volatilities from 10 to less than 10−4 μg m−3 at 298 K. Almost 40% of the HOA consisted of low-volatility organic compounds (LVOCs) with the semi-volatile compounds (SVOCs) representing roughly 30%, while the remaining 30% consisted of extremely low volatility organic compounds (ELVOCs). BBOA was more volatile than the HOA factor on average, with 10% ELVOCs, 40% LVOCs, and 50% SVOCs. 10% of the COA consisted of ELVOCs, another 65% LVOCs, and 50% SVOCs. Finally, the OOA was the least volatile factor and included 40% ELVOCs, 25% LVOCs, and 35% SVOCs. Combining the volatility distributions and the O:C ratios of the various factors, we placed our results in the 2D-VBS analysis framework of Donahue et al. (2012). HOA and BBOA are in the expected region but also include an ELVOC component. COA is in similar range as HOA, but on average is half an order of magnitude more volatile. The OOA in these wintertime conditions had a moderate O:C ratio and included both semi-volatile and extremely low volatility components. The above results are sensitive to the assumed values of the effective vaporization enthalpy and the accommodation coefficient. A reduction of the accommodation coefficient by an order of magnitude or the reduction of the vaporization enthalpy by 20 kJ mol−1 results in the increase of the average volatility by half an order of magnitude. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82440
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemical Engineering, University of Patras, Patras, Greece; Institute of Chemical Engineering Sciences, FORTH/ ICEHT, Patras, Greece; Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, United States
Recommended Citation:
Louvaris E,E,, Florou K,et al. Volatility of source apportioned wintertime organic aerosol in the city of Athens[J]. Atmospheric Environment,2017-01-01,158