The heterogeneous reaction of NO3 with NaCl and KBr: A nonphotolytic source of halogen atoms

The heterogeneous reactions of NO3 on NaCl and KBr salt were studied at room temperature using a Knudsen reactor equipped with dual detection, namely Laser induced fluorescence (LIF) and mass spectrometry (MS). The uptake coefficients of NO3 were found to be γ = (4.9±3)·10−2 onto NaCl and γ = 0.16±0...

Full description

Saved in:
Bibliographic Details
Published in:Geophysical research letters 1997-11, Vol.24 (22), p.2757-2760
Main Authors: Seisel, Sabine, Caloz, François, Fenter, Frederick F., van den Bergh, Hubert, Rossi, Michel J.
Format: Article
Language:English
Subjects:
Chemical composition and interactions. Ionic interactions and processes
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The heterogeneous reactions of NO3 on NaCl and KBr salt were studied at room temperature using a Knudsen reactor equipped with dual detection, namely Laser induced fluorescence (LIF) and mass spectrometry (MS). The uptake coefficients of NO3 were found to be γ = (4.9±3)·10−2 onto NaCl and γ = 0.16±0.08 onto KBr. In the case of NaCl, HCl was the sole product observed. However, there is indirect evidence that Cl atoms are the primary products. In the case of KBr we observed Br2 and Br to be the products of reaction. A first estimation of the atmospheric relevance of these reactions indicate that under certain conditions the heterogeneous loss of NO3 on seasalt aerosols may compete with removal by homogeneous gas phase reactions.
ISSN:0094-8276
1944-8007
DOI:10.1029/97GL02857