DOI: 10.1016/j.atmosenv.2014.11.042
Scopus记录号: 2-s2.0-84911886702
论文题名: Natural organic matter in urban aerosols: Comparison between water and alkaline soluble components using excitation-emission matrix fluorescence spectroscopy and multiway data analysis
作者: Matos J ; T ; V ; , Freire S ; M ; S ; C ; , Duarte R ; M ; B ; O ; , Duarte A ; C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 102 起始页码: 1
结束页码: 10
语种: 英语
英文关键词: Alkaline-soluble organic matter
; Atmospheric aerosols
; Emission-excitation matrix
; Fluorescence spectroscopy
; PARAFAC-ALS
; Water-soluble organic matter
Scopus关键词: Aerosols
; Atmospheric thermodynamics
; Biogeochemistry
; Biological materials
; Fluorescence
; Fluorescence spectroscopy
; Organic compounds
; Alternating least squares
; Emission excitation
; Excitation emission matrices
; Excitation-emission matrix fluorescence spectroscopies
; Multi-way data analysis
; PARAFAC
; Soluble organic matters
; Water-soluble organic matter
; Atmospheric aerosols
; alkalinizing agent
; natural organic matter
; water
; aerosol composition
; alkalinity
; data interpretation
; fluorescence spectroscopy
; organic matter
; urban atmosphere
; aerosol
; algorithm
; Article
; comparative study
; fluorescence spectroscopy
; seasonal variation
; sequence analysis
; urban area
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: Understanding the complexity of Natural Organic Matter (NOM) in atmospheric aerosols has remained an important goal for the atmospheric research community. This work employs a Parallel Factor Model (PARAFAC) with Alternating Least Squares (ALS) algorithm to decompose and further compare sets of excitation-emission matrices fluorescence spectra of Water-soluble and Alkaline-soluble Organic Matter (WSOM and ASOM, respectively), sequentially extracted from urban aerosols collected during different seasons. The PARAFAC-ALS modelling identified three components in both WSOM and ASOM, whose maximum intensities follow a clear seasonal trend and which are likely to represent the dominant fluorescent moieties in NOM from urban aerosols. The PARAFAC-ALS modelling also indicated differences between the colder and warmer seasons in the fluorescence map of one WSOM component, which contrast with the results obtained for the ASOM, where the fluorescence signatures were found to be constant along the seasons, suggesting that the ASOM may have an in situ origin. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82012
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
Recommended Citation:
Matos J,T,V,et al. Natural organic matter in urban aerosols: Comparison between water and alkaline soluble components using excitation-emission matrix fluorescence spectroscopy and multiway data analysis[J]. Atmospheric Environment,2015-01-01,102