DOI: 10.1016/j.atmosenv.2018.04.007
Scopus记录号: 2-s2.0-85045415327
论文题名: Deliquescence behavior of photo-irradiated single NaNO3 droplets
作者: Seng S ; , Guo F ; , Tobon Y ; A ; , Ishikawa T ; , Moreau M ; , Ishizaka S ; , Sobanska S
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 183 起始页码: 33
结束页码: 39
语种: 英语
英文关键词: Atmospheric aerosol
; Hygroscopicity
; Photochemistry
; Raman spectroscopy
; Single particle
; Sodium nitrate
Scopus关键词: Atmospheric aerosols
; Atmospheric humidity
; Chemical modification
; Drops
; Fossil fuels
; Ions
; Nitrates
; Nitrogen oxides
; Phase diagrams
; Photochemical reactions
; Raman spectroscopy
; Anthropogenic emissions
; Chemical transformations
; Hygroscopic properties
; Hygroscopicity
; Photoproducts formation
; Raman microspectrometry
; Single particle
; Transformation process
; Sodium nitrate
; carbonic acid
; peroxynitrite
; sodium nitrate
; aerosol composition
; anthropogenic effect
; atmospheric pollution
; droplet
; experimental study
; fossil fuel
; hygroscopicity
; irradiance
; nitrate
; oxidant
; photochemistry
; Raman spectroscopy
; troposphere
; aerosol
; Article
; humidity
; priority journal
; Raman spectrometry
; ultraviolet irradiation
; wettability
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: Nitrate-containing particles are ubiquitous in the troposphere because of their secondary production due to anthropogenic emissions of NOx from the combustion of fossil fuels. Nitrate ions are recognized as photoactive species that may contribute to the formation of oxidants in the atmosphere through heterogeneous photochemical reactions. The chemical transformation of aerosol particles in the atmosphere often leads to modification of the particles’ hygroscopic properties. Although the photo-transformation of nitrate ions into nitrite within aerosol particles has been investigated, the influence of the photoproducts formation on the hygroscopic behavior of particles has not been reported. In this study, we examined the hygroscopic properties of single, ultraviolet-irradiated NaNO3 droplets using Raman microspectrometry. We are the first demonstrated that irradiating NaNO3 particles affects their hygroscopic behavior. For short-term exposures, regarding hygroscopic behavior, the irradiated particles exhibited two-stage transitions that were clearly reproduced in the experimental NaNO3-NaNO2 phase diagram. The production of NO2 − decreased the deliquescence relative humidity values. For long irradiation times (>5 h), these values are even more affected by the additional production of peroxynitrite and carbonate ions in individual droplets. The NaNO3-NaNO2 deliquescence phase diagram cannot explain the hygroscopic behavior of long-term irradiated particles. Finally, we demonstrated the influence that CO2 has on the photo-transformation process in NaNO3 droplets. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82890
Appears in Collections: 气候变化事实与影响
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作者单位: Laboratoire de Spectrochimie Infrarouge et Raman, UMR CNRS 8516, Université de Lille, Sciences et Technologies, Villeneuve d'Ascq Cedex, France; Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Japan; Institut des Sciences Moléculaires, CNRS UMR 5255, Université de Bordeaux, 351 Cours de la Libération, Talence Cedex, France
Recommended Citation:
Seng S,, Guo F,, Tobon Y,et al. Deliquescence behavior of photo-irradiated single NaNO3 droplets[J]. Atmospheric Environment,2018-01-01,183