We studied the influence of KCl on the dynamics of Mn release from selected manganese oxide minerals. The release of Mn increased consistently with increasing concentration of KCl (0, 0.01, 0.1, and 1 M). As the concentration was increased from 0 to 1 M, the release in a 20-h reaction period at 297K increased 7.2, 2.9, and 1.6 times at pH 5.0 and 7.0, 2.0 and 1.4 times at pH 7.0 for pyrolusite, hausmannite, and cryptomelane, respectively. The release of Mn was attributed to the reduction and disproportionation of Mn(IV) and Mn(III) of the Mn oxides to Mn(II) in aqueous system, as confirmed by ESR spectroscopy, and to the subsequent formation of MnCl+ complex in the KCl system. The Mn release was rapid initially (0 to 0.25 h) and then decreased subsequently (1 to 20 h), following a multiple zero-order kinetics. The rate constants of the Mn release are in the same order as the specific surface of the minerals, i.e., cryptomelame > hausmannite > pyrolusite. The kinetic data indicate that more than one factor controlled the Mn release from the three Mn oxide minerals. The dependence of Mn release on KCl concentration, temperature, and time was evaluated and an empirical equation was derived relating these variables. The results indicate that the Mn release varies with the nature of Mn-bearing minerals studied.