Deliquescence behavior of photo-irradiated single NaNO 3 droplets

Seng, Samantha; Guo, Fangqin; Tobon, Yeny; Ishikawa, Tomoki; Moreau, Myriam; Ishizaka, Shoji; Sobanska, Sophie

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1016/j.atmosenv.2018.04.007

URL permanente :

http://hdl.handle.net/20.500.12210/57766

Titre :

Deliquescence behavior of photo-irradiated single NaNO 3 droplets

Auteur(s) :

Seng, Samantha [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Guo, Fangqin [Auteur]
Hiroshima University
Tobon, Yeny [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Ishikawa, Tomoki [Auteur]
Hiroshima University
Moreau, Myriam [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Ishizaka, Shoji [Auteur]
Hiroshima University
Sobanska, Sophie [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]

Titre de la revue :

Atmospheric Environment

Numéro :

183

Pagination :

33-39

Date de publication :

2018-06

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

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 ...
Lire la suite >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.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
ENSCL
Université de Lille

Collections :

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Équipe(s) de recherche :

Physicochimie de l’Environnement (PCE)

Date de dépôt :

2021-11-16T08:23:26Z
2024-02-21T08:18:16Z

Numéro de version	Lien	Date de modification
2	20.500.12210/57766*	2024-02-21T08:14:46Z
1	20.500.12210/57766.1	2021-11-16T08:23:26Z

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