Kinetics and Mechanism of the Iron(III)-catalyzed Autoxidation of Sulfur(IV) Oxides in Aqueous Solution. Evidence for the Redox Cycling of Iron in the Presence of Oxygen and Modeling of the Overall Reaction Mechanism

摘要: Kinetic traces for the redox decomposition of iron(III)-sulfito complexes exhibit a peculiar break in presence oxygen. A detailed kinetic analysis this feature as function [Fe(III)], [Fe(II)], [S(IV)], and [O 2 ] at pH 2.5 indicated that step is result sulfate-induced autoxidation produced iron(II) The so observed cycling iron comes to dead end point time when all oxygen solution has been used up