DOI: 10.1016/j.atmosenv.2014.04.018
Scopus记录号: 2-s2.0-84899135212
论文题名: Variation of secondary coatings associated with elemental carbon by single particle analysis
作者: Zhang G ; , Bi X ; , He J ; , Chen D ; , Chan L ; Y ; , Xie G ; , Wang X ; , Sheng G ; , Fu J ; , Zhou Z
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 162
结束页码: 170
语种: 英语
英文关键词: Elemental carbon
; Mixing state
; Organics
; PRD
; Single particle
; Sulfate
Scopus关键词: Carbon
; Climate models
; Coatings
; Condensation
; Drops
; Mixing
; Nitrates
; Photochemical forming
; Elemental carbon
; Mixing state
; Organics
; PRD
; Single particle
; Sulfate
; Uncertainty analysis
; ammonia
; ammonium nitrate
; ammonium sulfate
; carbon
; elemental carbon
; fossil fuel
; nitrate
; organic carbon
; sulfate
; unclassified drug
; air sampling
; atmospheric pollution
; carbon
; climate effect
; coating
; droplet
; fossil fuel
; mass spectrometry
; mixing
; photochemistry
; sulfate
; aerosol
; air pollution
; article
; biomass
; chemical composition
; China
; circadian rhythm
; climate
; mass spectrometer
; material coating
; physical chemistry
; priority journal
; single particle aerosol mass spectrometer
; China
; Guangdong
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: The mixing state of elemental carbon (EC) with secondary species has been highlighted as a major uncertainty in assessing its climate impact. However, the extent to which secondary coatings are present on EC and the underlying processes remained poorly understood in China, where there is a high loading of EC produced from extensive usage of fossil fuels and biomass. A single particle aerosol mass spectrometer (SPAMS) was applied to detect the chemical compositions associated with EC at the Guangdong Atmospheric Supersite, China. Efforts were made to track the variation of secondary coatings on EC. It is the first report on the direct observation of secondary compositions associated with EC with high time resolution in China. The hourly average number of EC-containing particles accounted for ~33% (21-50%) of total analyzed particles over the sampling period. EC was found to be extensively internally mixed with sulfate (97.4% in number), nitrate (89.5%), oxidized organics (69.6%), and/or ammonium (80%). The results also indicate that secondary processing on EC in condensation (0.2-0.5μm) and droplet (0.7-1.1μm) modes is different. Active photochemical formation of oxidized organics and ammonium sulfate during daytime, and formation of ammonium nitrate during nighttime led to a distinct diurnal circle of mixing state of EC in the condensation mode. However, the photochemical aging may have limited or negligible influence on the mixing state and growth of EC in the droplet mode. These findings improve the understanding of the evolution of physicochemical properties of EC, and may help to model its climate impact. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81197
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Department of Environmental Engineering, Jinan University, Guangzhou 510632, China; State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Monitoring Center, Guangzhou 510308, China
Recommended Citation:
Zhang G,, Bi X,, He J,et al. Variation of secondary coatings associated with elemental carbon by single particle analysis[J]. Atmospheric Environment,2014-01-01,92