DOI: 10.1016/j.atmosenv.2015.09.003
Scopus记录号: 2-s2.0-84941284606
论文题名: Evolution of biomass burning smoke particles in the dark
作者: Li C ; , Ma Z ; , Chen J ; , Wang X ; , Ye X ; , Wang L ; , Yang X ; , Kan H ; , Donaldson D ; J ; , Mellouki A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 120 起始页码: 244
结束页码: 252
语种: 英语
英文关键词: Aerosol chamber
; Dark aging
; Effective density
; Hygroscopicity
; RH effect
; Smoke particle
Scopus关键词: Aerosols
; Particle size
; Salts
; Smoke
; Aerosol chambers
; Aerosol particle mass analyzers
; Biomass burning smokes
; Effective density
; Hygroscopicity
; Physio-chemical properties
; Size-resolved particles
; Smoke particles
; Particle size analysis
; chloride
; inorganic salt
; nitrate
; sulfate
; aerosol property
; biomass burning
; chemical composition
; dark
; hygroscopicity
; particle size
; physicochemical property
; relative humidity
; smoke
; straw
; wheat
; aerosol particle mass analyzer
; analyzer
; Article
; biomass
; burn
; chemical composition
; density
; evolution
; mass
; particle size
; physical chemistry
; priority journal
; smoke
; wettability
; Triticum aestivum
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 evolution in the dark of physiochemical properties and chemical composition of smoke particles emitted from wheat straw burning, as well as the effect of relative humidity (RH) on these properties, was investigated in an aerosol chamber. The smoke particles are composed primarily of carbonaceous materials and a considerable amount of inorganic salts (~25 wt.%). During aging, the fraction of inorganic salts in smoke PM1.0 increases, mainly due to the formation of more sulfate and nitrate at the expense of chloride; this heterogeneous conversion is facilitated at high RH. The hygroscopicity parameter κH of fresh smoke particles is 0.27 and this is estimated to decrease by 0.01 after 4 h dark aging. Both aging and high RH lead to increases of particle size and density. The effective densities of smoke PM2.5 and PM1.0 deduced from concurrent mass and volume concentration measurements gradually increase from about 1.18 to 1.44 g/m3 within 4 h aging at 45%-55% RH, in line with the results obtained both from size-resolved particle density analysis using an aerosol particle mass analyzer (APM) and from estimation using composition-weighted bulk densities. The density of smoke particle is size-, RH-, and aging extent-dependent; the size effect becomes less pronounced with aging. © 2015 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81485
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 (LAP), Fudan Tyndall Center, Department of Environmental Science and Engineering, Fudan University, Shanghai, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada; Institut de Combustion, Aérothermique, Réactivité et Environnement, CNRS, Orléans Cedex 02, France
Recommended Citation:
Li C,, Ma Z,, Chen J,et al. Evolution of biomass burning smoke particles in the dark[J]. Atmospheric Environment,2015-01-01,120