DOI: 10.1016/j.atmosenv.2014.02.045
Scopus记录号: 2-s2.0-84896265332
论文题名: Ionic strength dependence of the oxidation of SO2 by H2O2 in sodium chloride particles
作者: Ali H ; M ; , Iedema M ; , Yu X ; -Y ; , Cowin J ; P
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 89 起始页码: 731
结束页码: 738
语种: 英语
英文关键词: Brine
; Ionic strength
; Oxidation
; Sodium chloride
; Sulfate
Scopus关键词: Aerosols
; Brines
; Ionic strength
; Oxidation
; Rate constants
; Reaction kinetics
; Scanning electron microscopy
; Spreaders
; Sulfur dioxide
; Chloride depletion
; Compositional transformations
; Energy dispersive x-ray
; Henry's Law constant
; Ionic strength dependence
; Kinetic equilibrium
; Sulfate
; Sodium chloride
; ammonium chloride
; ammonium nitrate
; ammonium sulfate
; hydrogen peroxide
; sodium chloride
; sodium nitrate
; sulfate
; aerosol composition
; atmospheric chemistry
; bioreactor
; brine
; hydrogen peroxide
; ionic composition
; oxidation
; scanning electron microscopy
; solubility
; sulfate
; X-ray spectroscopy
; aerosol
; article
; chemical reaction kinetics
; dissolution
; humidity
; ionic strength
; oxidation
; priority journal
; scanning electron microscope
; solubility
; X ray analysis
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 reaction of sulfur dioxide and hydrogen peroxide in the presence of deliquesced (>75% RH) sodium chloride (brine) particles was studied by utilizing a cross flow mini-reactor. The reaction kinetics were followed by observing chloride depletion in particles by computer-controlled scanning electron microscope with energy dispersive X-ray analysis, namely CCSEM/EDX. The reactions take place in concentrated mixed salt brine aerosols, for which no complete kinetic equilibrium data previously existed. We measured the Henry's law solubility of H2O2 in brine solutions to close that gap. We also calculated the reaction rate as the particle transforms continuously from concentrated NaCl brine to, eventually, a mixed NaHSO4 plus H2SO4 brine solution. The reaction rate of the SO2 oxidation by H2O2 was found to be influenced by the change in ionic strength as the particle undergoes compositional transformation, following closely the dependence of the third order rate constant on ionic strength as predicted using established rate equations. This is the first study that has measured the ionic strength dependence of sulfate formation (in non-aqueous media) from oxidation of mixed salt brine aerosols in the presence of H2O2. It also gives the first report of the dependence of the Henry's law constant of H2O2 on ionic strength. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81269
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry and Physics, Arkansas State University, Jonesboro, AR 72467, United States; Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99354, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA 99354, United States; Chemical and Material Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99354, United States
Recommended Citation:
Ali H,M,, Iedema M,et al. Ionic strength dependence of the oxidation of SO2 by H2O2 in sodium chloride particles[J]. Atmospheric Environment,2014-01-01,89