Premium
The heterogeneous reaction of NO 3 with NaCl and KBr: A nonphotolytic source of halogen atoms
Author(s) -
Seisel Sabine,
Caloz François,
Fenter Frederick F.,
van den Bergh Hubert,
Rossi Michel J.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl02857
Subject(s) - halogen , mass spectrometry , homogeneous , knudsen number , analytical chemistry (journal) , salt (chemistry) , fluorescence , chemistry , environmental chemistry , organic chemistry , thermodynamics , chromatography , optics , alkyl , physics
The heterogeneous reactions of NO 3 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 NO 3 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 Br 2 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 NO 3 on seasalt aerosols may compete with removal by homogeneous gas phase reactions.