DOI: 10.1016/j.atmosenv.2017.06.049
Scopus记录号: 2-s2.0-85021697117
论文题名: Influence of relative humidity on heterogeneous reactions of O3 and O3/SO2 with soot particles: Potential for environmental and health effects
作者: He X ; , Pang S ; , Ma J ; , Zhang Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 165 起始页码: 198
结束页码: 206
语种: 英语
英文关键词: Atmospheric particle
; O3/SO2
; Reaction kinetics
; Soot
; Sulfate
Scopus关键词: Dust
; Fourier transform infrared spectroscopy
; Ketones
; Rate constants
; Reaction kinetics
; Soot
; Sulfur compounds
; Sulfur dioxide
; Atmospheric particles
; Environmental and health effects
; Fourier transform infra reds
; Heterogeneous reactions
; Pseudo first order rate constants
; Reaction mechanism
; Sulfate
; Uptake coefficients
; Atmospheric humidity
; cadmium
; carbene
; carbonyl derivative
; ketone
; mercury
; oxygen
; ozone
; sulfate
; sulfur dioxide
; water
; chemical reaction
; environmental effect
; FTIR spectroscopy
; health impact
; inorganic compound
; ozone
; reaction kinetics
; reaction rate
; relative humidity
; soot
; sulfate
; aerosol
; Article
; chemical reaction
; environmental health
; health hazard
; health status
; human
; humidity
; hydrophilicity
; infrared spectroscopy
; kinetic parameters
; microscopy
; oxidation
; particulate matter
; priority journal
; rate constant
; reaction analysis
; seasonal variation
; soot
; surface property
; troposphere
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 heterogeneous reactions of soot particles with O3 and the mixture of O3 and SO2 were studied as a function of relative humidities (RHs). The reactions were followed in real time using microscopic Fourier transform infrared (micro-FTIR) spectrometer to obtain kinetic data. The results show that the ketone (C[dbnd]O) group is the main product of the O3/soot reaction, and the sulfate is identified on the surface of soot particles in the presence of O3/SO2. Both reactions are sensitive to RHs and surrounding water significantly promotes the proceeding of the heterogeneous reactions. For the O3/soot reaction, the pseudo-first-order rate constant increases from 3.2 × 10−4 s−1 to 7.1 × 10−4 s−1 with increasing RH in the range of 1%–82%. When O3 and SO2 exist simultaneously during the reaction, the reaction rate and uptake coefficient are all enhanced by about an order of magnitude as the RH increases from 1% to 83%. The high productions of the ketone and sulfate on soot surface are of highly hydrophilic, which play a key role in environmental effect under humid environment. The possible reaction mechanism speculates that products of aromatic carbonyls and dihydrofuran species on soot particles will be more harmful to human health. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82760
Appears in Collections: 气候变化事实与影响
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作者单位: Institute of Chemical Physics, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China
Recommended Citation:
He X,, Pang S,, Ma J,et al. Influence of relative humidity on heterogeneous reactions of O3 and O3/SO2 with soot particles: Potential for environmental and health effects[J]. Atmospheric Environment,2017-01-01,165