Study of dissolution kinetics of manganese dioxide in oxalic and citric acids solutions

Abstract

The paper studies the influence of citrate and oxalates - ions on kinetics of dissolution of manganese dioxide. It is found that the speed of dissolution increases along with concentration of citric and oxalic acids. Orders on citrate and to oxalates - ions are designed. The empirical formulas describing dependence of speed of dissolution from concentration of the specified acids are offered. In order to obtain the optimal modes of leaching of manganous oxide from anthropogenic raw material the authors investigate the influence рН on the speed of MnO2 dissolution in oxalic acid.