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.
Keywords: 7726-95-6 (Bromine) ; 7782-50-5 (Chlorine) Role: GFM (Geological or astronomical formation) ; GPR (Geological or astronomical process) ; FORM (Formation ; nonpreparative) ; PROC (Process) (heterogeneous reaction of NO3 with NaCl and KBr ; a nonphotolytic sour ; atm nitrogen oxide nonphotolytic chlorine bromine
Copyright 2003 ACS
Mineralogical and Geological Chemistry
Laboratoire de Pollution Atmospherique et Sol (LPAS),Swiss Federal Institute of Technology (EPFL),Lausanne,Switz. FIELD URL:
written in English.
Atmosphere; Troposphere (heterogeneous reaction of NO3 with NaCl and KBr, a nonphotolytic source of halogen atoms)
Record created on 2011-02-01, modified on 2016-08-09