DOI: 10.1016/j.atmosenv.2014.06.051
Scopus记录号: 2-s2.0-84903436414
论文题名: Online hygroscopicity and chemical measurement of urban aerosol in Shanghai, China
作者: Wang X ; , Ye X ; , Chen H ; , Chen J ; , Yang X ; , Gross D ; S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 95 起始页码: 318
结束页码: 326
语种: 英语
英文关键词: Aerosol
; ATOFMS
; Growth factor
; Hygroscopicity
Scopus关键词: Chemical analysis
; Hydrophilicity
; Hydrophobicity
; Silicon oxides
; Aerosol time-of-flight mass spectrometers
; ATOFMS
; Chemical measurements
; Chemical signatures
; Growth factor
; Hygroscopicity
; Hygroscopicity-tandem differential mobility analyzers
; Submicron aerosol
; Aerosols
; aluminum
; nitrate
; organic carbon
; potassium
; potassium salt
; silicon
; aerosol
; carbon
; hydrophobicity
; hygroscopicity
; oxide
; urban area
; aerosol
; article
; biomass
; chemical composition
; China
; combustion
; dust
; human
; hydrophobicity
; molecular weight
; priority journal
; secondary organic aerosol
; signal noise ratio
; signal transduction
; solubility
; urban area
; wettability
; China
; Shanghai
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: Submicron aerosol hygroscopicity and composition were simultaneously measured with a Hygroscopicity-Tandem Differential Mobility Analyzer (HTDMA) in-line with an Aerosol Time-of-Flight mass spectrometer (ATOFMS) in wintertime of 2009 in Shanghai. 250nm dry diameter aerosol particles were humidified (85% RH) and selected based on their hygroscopicity. Two Growth Factor (GF) modes were observed persistently: a weak nearly-hydrophobic (NH) mode with GF at around 1.05 and a strong hydrophilic mode with GF around 1.46. Aerosol particles at different GFs were chemically analyzed by ATOFMS to link the aerosol hygroscopicity and chemistry. Particles were grouped into five major classes: inorganic dust/ash, biomass burning particles (BB), elemental carbon and organic carbon mixed particles (ECOC), Amine rich organic carbon particles (OC-Amine), and high mass organic carbon particles (HMOC). Different particle types were found enriched in the two GF modes. ECOC and OC-Amine particles internally mixed with secondary inorganic species were found mostly in the hydrophilic mode. Pure EC particles and a small group of clay particles among the dust/ash type with strong signals of aluminum and silicon oxides appeared in the NH mode. HMOC particles were exclusively found in the NH mode. Chemical signature intensities were analyzed to examine the particle mixing states and their impact on the diversity of hygroscopicity for each particle type. BB particles in the NH mode had stronger organic carbon signals, while those in hydrophilic mode had stronger potassium salt signals. In general, an elevated OC mass fraction increased particle's hydrophobicity. Amine and secondary inorganic species such as nitrate strongly increased particle's hygroscopicity. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81223
Appears in Collections: 气候变化事实与影响
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作者单位: Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Fudan-Tyndall Center, Fudan University, Shanghai 200433, China; Department of Chemistry, Carleton College, Northfield, MN 55057, United States
Recommended Citation:
Wang X,, Ye X,, Chen H,et al. Online hygroscopicity and chemical measurement of urban aerosol in Shanghai, China[J]. Atmospheric Environment,2014-01-01,95