1991 Volume 64 Issue 6 Pages 1955-1961
Autoxidation of S(IV), in buffered solutions,conforms the rate law (1). The increase in buffer concentration has a
rate decreasing effect. On the other hand, in unbuffered solutions the kinetics obey a different rate law (2).
In both situations, the dissolution of CdO accompanies the autoxidation. A heterogeneous catalytic mechanism involving adsorption of both dioxygen and sulfur(IV) on the surface of CdO particle has been proposed.
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