Characterization and Source Apportionment of Water-Soluble Organic   Matter in Atmospheric Fine Particles (PM2.5) with High-Resolution   Aerosol Mass Spectrometry and GC-MS

doi:10.1021/es200162h

CORC > 北京大学 > 环境科学与工程学院

	Characterization and Source Apportionment of Water-Soluble Organic Matter in Atmospheric Fine Particles (PM2.5) with High-Resolution Aerosol Mass Spectrometry and GC-MS
	Sun, Yele ; Zhang, Qi ; Zheng, Mei ; Ding, Xiang ; Edgerton, Eric S. ; Wang, Xinming
刊名	environmental science technology
	2011
关键词	SOUTHEASTERN UNITED-STATES POSITIVE MATRIX FACTORIZATION BIOMASS BURNING AEROSOLS CHEMICAL-COMPOSITION SECONDARY CARBON EMISSIONS IDENTIFICATION SPECTROSCOPY COMPONENTS
DOI	10.1021/es200162h
英文摘要	Water-soluble organic matter (WSOM) in fine particles (PM2.5) collected at one rural and three urban sites from the Southeastern Aerosol Research and Characterization network were characterized with a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS). These samples were also analyzed for a suite of molecular markers by Gas Chromatography Mass Spectrometry (GC-MS) to assist in the interpretation of WSOM sources. The HR-ToF-AMS measurements allow a direct determination of the organic mass-to-carbon ratios (average +/- 1 sigma = 1.93 +/- 0.12) and hence the quantification of WSOM on the same filters used to close the aerosol mass budget. WSOM constitutes a major fraction of total PM2.5 mass (26-42%) and organic mass (50-90%) at all sites. The concentrations of WSOM are substantially higher in summer, mainly due to enhanced production of biogenic secondary organic aerosol (SOA). WSOM is composed mainly of oxygenated species with average oxygen-to-carbon (O/C) ratio of 0.56 (+/- 0.08). Positive matrix factorization (PMF) of the high resolution mass spectra of WSOM identifies a less oxidized component (denoted as lOOA, O/C = 0.50) associated with biogenic SOA and a more wicked component (denoted as mOOA, O/C = 0.60) associated with WSOM contributed by wood combustion. On average, lOOA accounts for 75 (+/- 13) % of WSOM in summer while mOOA accounts for 78 (+/- 21) 96 in winter, suggesting that WSOM in the southeastern U.S. is primarily contributed by S OA production from biogenic species in summer and by wood burning emissions in winter. This work also demonstrates the utility of HR-ToF-AMS for investigating the bulk chemical composition of WSOM as well as for evaluating its source contributions.; Engineering, Environmental; Environmental Sciences; SCI(E); 0; ARTICLE; 11; 4854-4861; 45
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/239117]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Sun, Yele,Zhang, Qi,Zheng, Mei,et al. Characterization and Source Apportionment of Water-Soluble Organic Matter in Atmospheric Fine Particles (PM2.5) with High-Resolution Aerosol Mass Spectrometry and GC-MS[J]. environmental science technology,2011.
APA	Sun, Yele,Zhang, Qi,Zheng, Mei,Ding, Xiang,Edgerton, Eric S.,&Wang, Xinming.(2011).Characterization and Source Apportionment of Water-Soluble Organic Matter in Atmospheric Fine Particles (PM2.5) with High-Resolution Aerosol Mass Spectrometry and GC-MS.environmental science technology.
MLA	Sun, Yele,et al."Characterization and Source Apportionment of Water-Soluble Organic Matter in Atmospheric Fine Particles (PM2.5) with High-Resolution Aerosol Mass Spectrometry and GC-MS".environmental science technology (2011).