Author(s)

F. Schweitzer, Ch. George and Ph. Mirabel

Abstract

Uptake of Aldehydes by Aqueous Solutions A contribution to subproject CMD F. Schweitzer, Ch. George and Ph. Mirabel Egwzpe de f /%/wco-C/zzWg de /Wrmojp/zgrg (CGS-OMt% 2&, rwe GoefAe, F-67083 Strasbourg Cedex, France Introduction It is now recognised that gas phase aldehydes, which are generated in the atmosphere by the photo-oxidation of organic compounds, may be transferred into aqueous droplets (clouds, fogs) where they represent stabilising agents for S(IV) in the sense that they lead to the formation of stable complexes. These latter are much less reactive towards the attack of free radicals and essentially inert against typical oxidants (i.e. Og, HzOz). Such processes may then have a direct impact on the HbSC^ formation rate and on the scavenging of SO: by cloud droplets. For example, Olson and Hoffmann (1989) have shown that the presence of glyoxal (CHOCHO) in aqueous droplets may double their content of sulfu

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