DOI: 10.1016/j.atmosenv.2014.04.054
Scopus记录号: 2-s2.0-84900988211
论文题名: Possible sources of two size-resolved water-soluble organic carbon fractions at a roadway site during fall season
作者: Park S ; -S ; , Kim J ; -H
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 94 起始页码: 134
结束页码: 143
语种: 英语
英文关键词: Aerosol size distributions
; Production pathways
; Roadway
; Size-resolved WSOC fractions
; Water-soluble organic carbon (WSOC) fractions
Scopus关键词: Aerosols
; Drops
; Organic compounds
; Oxalic acid
; Aerosol size distributions
; Production pathways
; Roadway
; Size-resolved WSOC fractions
; Water-soluble organic carbon
; Size distribution
; organic carbon
; oxalic acid
; unclassified drug
; water soluble organic carbon
; aerosol
; atmospheric pollution
; autumn
; biogenic emission
; biomass burning
; condensation
; gas phase reaction
; motorway
; organic carbon
; particle size
; sea salt
; size distribution
; aerosol
; article
; biomass
; biomass distribution
; chemical composition
; column chromatography
; controlled study
; hydrophilicity
; hydrophobicity
; oxidation
; particle size
; particulate matter
; priority journal
; secondary organic aerosol
; Korea
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: To examine the formation pathways of two size-resolved water-soluble organic carbon (WSOC) fractions, a total of 16 sets of size-segregated aerosol samples were collected using a 10-stage Micro-Orifice Uniform Deposit Impactor (MOUDI) at a roadway site in Korea from September 29 to October 29, 2010. A XAD7HP (non-ionic aliphatic acrylic polymer) resin column was used to separate the filtered extracts into hydrophilic (WSOCHPI) and hydrophobic (WSOCHPO) WSOC fractions. Also the size distributions of water-soluble inorganic species and oxalate were examined to determine the formation pathways of size-resolved WSOCHPI and WSOCHPO fractions.The size distribution of WSOCHPI showed a dominant mode at 0.55μm, while the WSOCHPO had dominant modes at both 0.17-0.32μm and 0.55μm. On the basis of the size distribution characteristics, it was found that the formation pathways of both WSOCHPI and WSOCHPO were dependent on the particle size; in the condensation mode (0.17-0.32μm), both the WSOCHPI and WSOCHPO could be produced through atmospheric processes similar to those of SO42- and oxalate, which were derived from the gas-phase oxidations of organic compounds. In the droplet mode (0.55-1.8μm), the cloud processing of both the organic compounds and biomass burning emissions could be a major pathway for the WSOCHPI formation. However, the droplet mode WSOCHPO was likely produced through cloud processing and heterogeneous reactions or aerosol-phase reactions. In the coarse mode (>3.1μm), the WSOCHPI formation was more likely associated with soil-related particles (Ca(NO3)2 and CaSO4) than with sea-salt particles (NaNO3 and Na2SO4). © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80873
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environment and Energy Engineering, 77 Yongbong Ro, Buk-ku, Gwangju 500-757, South Korea; Headquarter of Honam Region, Korea Environment Corporation, 217 Mujindae-Ro, Gwangsan-ku, Gwangju 506-813, South Korea
Recommended Citation:
Park S,-S,, Kim J,et al. Possible sources of two size-resolved water-soluble organic carbon fractions at a roadway site during fall season[J]. Atmospheric Environment,2014-01-01,94