Abstract
Manganese (II) is shown to be an efficient catalyst for radiation-induced HSO 3 − chain oxidation by molecular oxygen in aqueous solutions. The catalytic activity of Mn(II) is explained in terms of a free radical chain mechanism. The rate-determining step with a rate constant of k 9 ⩾ 1×10 6 M −1 s −1 is a reaction between SO 5 − radical and a manganese (II) bisulfite complex.
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