DOI: 10.1016/j.atmosenv.2015.08.012
Scopus记录号: 2-s2.0-84939217657
论文题名: Real-time and single-particle volatility of elemental carbon-containing particles in the urban area of Pearl River Delta region, China
作者: Bi X ; , Dai S ; , Zhang G ; , Qiu N ; , Li M ; , Wang X ; , Chen D ; , Peng P ; , Sheng G ; , Fu J ; , Zhou Z
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 118 起始页码: 194
结束页码: 202
语种: 英语
英文关键词: Atmospheric aging
; EC particles
; Mixing state
; PRD region
; Single particle
; Volatility
Scopus关键词: Aerosols
; Atmospheric chemistry
; Mass spectrometers
; Mass spectrometry
; Volatile organic compounds
; Aerosol mass spectrometers
; Low-volatile compounds
; Mixing state
; Pearl River Delta region
; PRD region
; Precursor concentration
; Single particle
; Volatility
; Organic carbon
; carbon
; nitrate
; organic carbon
; potassium
; sodium
; sulfate
; volatile agent
; atmospheric pollution
; carbon
; chemical composition
; climate effect
; mass spectrometry
; mixing
; particle size
; real time
; urban area
; volatile organic compound
; aerosol
; Article
; atmospheric transport
; chemical composition
; China
; climate
; evaporation
; mass spectrometer
; mass spectrometry
; measurement
; oxidation
; particle size
; priority journal
; river
; urban area
; China
; Guangdong
; Zhujiang Delta
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: Elemental carbon (EC) aerosol represents an important fraction of aerosol particles in urban area of the Pearl River Delta (PRD) region, China. Previous studies have demonstrated that EC particles in the PRD region undergo significant amounts of aging processes. To assess the degree of aging, the real-time single particle volatility of EC-containing particles was measured in an urban area of the PRD region by a thermodiluter coupled to a single particle aerosol mass spectrometer (SPAMS). The size and chemical composition of the individual particles before and after heating to 75 °C, 150 °C and 300 °C were characterized. Of the total unheated particles examined by SPAMS, 53% of the unheated particles contained EC, and a higher number fraction (69%) was observed in the particles heated to 300 °C. No significant differences in the mass spectral patterns were found between ambient temperature and 75 °C. Nitrate evaporated at 150 °C, and most of sulfate evaporated at 300 °C. EC-containing particles were clustered into four distinct particle types based on the dominant chemical species present in the mass spectra, comprised of EC, internally mixed EC and organic carbon (OC) (ECOC), internally mixed EC and sodium/potassium salt (NaK-EC), and internally mixed EC and metal species (Metal-EC). Detail analysis show that the volatility of EC-containing particles relied on the EC particle types. Among the four types, the EC type was quite volatile. A significant fraction of sulfate and organics in the ECOC type did not volatilize at 300 °C. The volatilities of secondary ions in the four EC-containing particle types were found to be dependent on their molecular composition. Additionally, the volatility of EC-containing particles decreased during the polluted hazy days due to the generation of low volatile compounds under the atmospheric conditions with higher precursor concentrations and oxidation capacity. To our knowledge, this is the first reported real-time volatility measurements of individual ambient aerosols in the PRD region. These findings provide an improved understanding of the aging process of EC particles, and may help in the modeling of its climate impact. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81516
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, Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Atmospheric Environment Institute of Safety and Pollution Control, Jinan University, Guangzhou, China; State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Monitoring Center, Guangzhou, China
Recommended Citation:
Bi X,, Dai S,, Zhang G,et al. Real-time and single-particle volatility of elemental carbon-containing particles in the urban area of Pearl River Delta region, China[J]. Atmospheric Environment,2015-01-01,118