Reactivity of No3 and HSO4 radicals toward multivalent metal ions in aqueous solutions

Pulse radiolysis mated with a recording spectrophotometer was used to measure the rate constants for reactions of HSO4 and NO3 radicals with metal ions in sulfuric and nitric acid solutions: k[HSO4 + M] = (3.6 +/- 0.4) x 109, (9.0 +/- 1.0) x 108, (1.3 +/- 0.1) x 108, (8.0 +/- 0.8) x 107, (2.0 +/- 0.2) x 107, (1.3 +/- 0.1) x 108 dm3/(mole x sec) for M = AG (I), SB (III), V (III), U (IV), Mn (II), and Ce (III), respectively; the k[NO3 + M] for M = Ag (I), T1 (I), Mn (II), and Ce (III) failed to change or increased slightly on raising the HNO3 concentration. The rates of HSO4 and NO3 reactions with vanadyl ion rose substantially on increasing the solution acidity