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 temp. using a Knudsen reactor equipped with dual detection, namely Laser induced fluorescence and mass spectrometry. The uptake coeffs. of NO3 were g=(4.9+-3).10-2 onto NaCl and g=0.16+-0.08 onto KBr. In the case of NaCl, HCl was the sole product obsd. However, there is indirect evidence that Cl atoms are the primary products. In the case of KBr we obsd. Br2 and Br to be the products of reaction. A first estn. of the atm. relevance of these reactions indicate that under certain conditions the heterogeneous loss of NO3 on sea-salt aerosols may compete with removal by homogeneous gas phase reactions.


Published in:
Geophysical Research Letters, 24, 22, 2757–2760
Year:
1997
Keywords:
Note:
Copyright 2003 ACS
CAPLUS
AN 1997:777650
CAN 128:64200
53-10
Mineralogical and Geological Chemistry
Laboratoire de Pollution Atmospherique et Sol (LPAS),Swiss Federal Institute of Technology (EPFL),Lausanne,Switz. FIELD URL:
Journal
GPRLAJ
written in English.
Atmosphere; Troposphere (heterogeneous reaction of NO3 with NaCl and KBr, a nonphotolytic source of halogen atoms)
Laboratories:




 Record created 2011-02-01, last modified 2018-01-28


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