Electric field enhancement in leaching of manganese from low-grade manganese dioxide ore: Kinetics and mechanism study

and the Ea (apparent activation energy) was 19.68 kJ/mol. During the leaching process, the newly formed Fe3 + that generated from the oxidation of ferrous on manganese dioxide surface was reduced to Fe2 + by electric field to ensure the Fe2 + in the solution keeps at a high level. The cycling of Fe3 + and Fe2 + ensured the high leaching efficiency of manganese during the process and reduced the dosage of the reducing agent.