DOI: 10.1016/j.atmosenv.2015.08.072
Scopus记录号: 2-s2.0-84940570592
论文题名: 1H NMR studies of water- and alkaline-soluble organic matter from fine urban atmospheric aerosols
作者: Lopes S ; P ; , Matos J ; T ; V ; , Silva A ; M ; S ; , Duarte A ; C ; , Duarte R ; M ; B ; O
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 119 起始页码: 374
结束页码: 380
语种: 英语
英文关键词: 1H NMR spectroscopy
; Alkaline-soluble organic matter
; Atmospheric aerosols
; Source apportionment
; Water-soluble organic matter
Scopus关键词: Aerosols
; Atmospheric thermodynamics
; Biogeochemistry
; Biological materials
; Carbon
; Nuclear magnetic resonance spectroscopy
; Organic compounds
; Carbon-oxygen double bonds
; Functional characteristics
; H NMR spectroscopy
; Relative contribution
; Soluble organic matters
; Source apportionment
; Structural feature
; Water-soluble organic matter
; Atmospheric aerosols
; alkaline soluble organic matter
; organic matter
; unclassified drug
; water soluble organic matter
; aerosol
; aerosol property
; alkalinity
; biomass burning
; chemical bonding
; hydrogen
; nuclear magnetic resonance
; organic matter
; physicochemical property
; pollutant source
; urban atmosphere
; aerosol
; air temperature
; Article
; atmosphere
; atmospheric aerosol
; autumn
; biomass
; forest
; precipitation
; priority journal
; proton nuclear magnetic resonance
; seasonal variation
; summer
; urban area
; winter
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: Solution-state 1H NMR spectroscopy was applied to characterize the structural features of water- and alkaline-soluble organic matter (WSOM and ASOM, respectively) sequentially extracted from fine urban atmospheric aerosols collected over different seasons. The objectives of this study were twofold: (i) to compare the functional characteristics of fine aerosol WSOM and the yet unknown ASOM, and (ii) to assess the sources of WSOM and ASOM at an urban location. The 1H NMR analysis confirmed that the WSOM and ASOM fractions hold similar 1H functional groups; however, they differ in terms of their relative distribution throughout the seasons. The winter and autumn samples have a less aliphatic and oxidized character and higher contributions from aromatic groups than those of warmer conditions. The urban aerosol WSOM and ASOM fractions do not fit the established 1H NMR source apportionment fingerprints of marine, secondary, and biomass burning organic aerosols (OAs), exhibiting a smaller relative contribution of carbon-oxygen double bonds, which is indicative of a less oxidized character. These results confirm that the boundaries of the pre-established source categories, especially for secondary and biomass burning OAs, might be different at urban locations, suggesting the need to improve the 1H NMR source apportionment model for including a new fingerprint for urban OAs. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81546
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry and CESAM, University of Aveiro, Aveiro, Portugal; Department of Chemistry and QOPNA, University of Aveiro, Aveiro, Portugal; Department of Chemistry, CESAM and CICECO, University of Aveiro, Aveiro, Portugal
Recommended Citation:
Lopes S,P,, Matos J,et al. 1H NMR studies of water- and alkaline-soluble organic matter from fine urban atmospheric aerosols[J]. Atmospheric Environment,2015-01-01,119