Abstract
Oxidation reactions of atmospheric sulfur and nitrogen compounds dissolved in aqueous solutions are reviewed. Important viewpoints were summarized in a matrix-like form for evaluating chemical reactions in the aqueous systems. Recent progresses are addressed for kinetics and mechanisms of the oxidation of major chemical species such as SO2, NO2, and H2S by H2O2, O3, and free radicals. Much of the informationis potentially applicable as well as to lake and ocean surface waters which compose the interface of the atmosphere.
Among the conclusions are the following:(1) Rate laws and rate constants are established for S (IV)-03 and S (IV)-H2O2 systems.(2) Reactions with OH and SO4- radicals are shown to be very important.(3) Reliable mechanisms are presented for the Fe (III)-catalyzed autoxidation of S (IV).(5) Accommodation coefficients are precisely determined for SO2, H2O2, and 03.
