DOI: 10.1016/j.atmosenv.2017.07.024
Scopus记录号: 2-s2.0-85025588566
论文题名: New insights on humic-like substances associated with wintertime urban aerosols from central and southern Europe: Size-resolved chemical characterization and optical properties
作者: Voliotis A ; , Prokeš R ; , Lammel G ; , Samara C
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 166 起始页码: 286
结束页码: 299
语种: 英语
英文关键词: Aerosols
; FTIR functional group analysis
; HULIS
; Ionic species
; UV–Vis light absorption
; WSOC
Scopus关键词: Aerosols
; Biomass
; Chromophores
; Coal combustion
; Fourier transform infrared spectroscopy
; Optical properties
; Organic carbon
; Particle size
; Solar energy
; Airborne particulate matters
; Chemical characterization
; Functional group analysis
; HULIS
; Ionic species
; Secondary inorganic aerosol
; Water-soluble organic carbon
; WSOC
; Urban growth
; humic acid
; organic carbon
; potassium
; absorbance
; aerosol
; aerosol property
; biomass burning
; chemical analysis
; chemical composition
; coal combustion
; FTIR spectroscopy
; humic substance
; ionic composition
; optical property
; organic carbon
; particle size
; particulate matter
; ultraviolet radiation
; urban atmosphere
; visible spectrum
; winter
; aerosol
; Article
; attenuation total reflectance spectroscopy
; biomass
; Central European
; chromatophore
; combustion
; humic substance
; infrared spectroscopy
; optics
; particle size
; priority journal
; solar energy
; Southern Europe
; Southern European
; spectroscopy
; suburban area
; winter
; Europe
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: Although Humic-LIke Substances (HULIS) are important contributors to the mass of organic aerosol in airborne particulate matter (PM), little is known about their chemical composition, while, their size-resolved optical properties have not been studied yet. Here, HULIS fractions were isolated from size-resolved aerosol samples (≤0.49, 0.49–0.95, 0.95–3 and 3–10 μm) collected in urban and suburban environments of four European cities during wintertime. The bulk (i.e., sum of all size fractions) concentration of HULIS ranged between 1.29 and 2.80 μg m−3 across sites with highest values in the ≤0.49 μm particle size fraction. The contribution of the carbon mass of HULIS (HULIS-C) to the water-soluble organic carbon content (WSOC) of PM was 32–43%, which is typical for urban sites affected by biomass burning. The Mass Absorption Efficiency (MAE), which characterizes the efficiency of absorbing solar energy per carbon mass of HULIS decreased with particle size, suggesting that the finest size fractions contain more light-absorbing chromophores, which could affect the light-absorbing ability of organic aerosols. The good correlation of HULIS with effective biomass tracers such as K+, as well as with secondary inorganic aerosol components, proposed that HULIS had both primary (i.e., biomass burning) and secondary sources. The Fourier Transfer Infrared coupled to Attenuation Total Reflectance (FTIR-ATR) spectra demonstrated prevalence of aromatic over carboxylic functional groups in most HULIS fractions, indicating contribution from coal combustion emissions in addition to fresh biomass burning aerosol. The new findings add to better understanding the sources and chemical structure of HULIS in urban and suburban environments. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82404
Appears in Collections: 气候变化事实与影响
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作者单位: Aristotle University of Thessaloniki, Department of Chemistry, Environmental Pollution Control Laboratory, Thessaloniki, Greece; Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, Czech Republic; Max Planck Institute for Chemistry, Multiphase Chemistry Department, Mainz, Germany
Recommended Citation:
Voliotis A,, Prokeš R,, Lammel G,et al. New insights on humic-like substances associated with wintertime urban aerosols from central and southern Europe: Size-resolved chemical characterization and optical properties[J]. Atmospheric Environment,2017-01-01,166