Treatment Mechanism of Mine Water with High Concentration of Manganese on Surface-Modified Filter Material

In order to achieve the goal of reusing the mine water with high manganese, this paper studies the mechanism with surface-modified filtration media in treating the mine water from 9^th-colliery of Hebei Coal Group. The experiment results show that: the quality of effluent is stable by manganese sand immersed with 3-5% KMnO₄, the single cycle can reach 24 hours with manganese less than 0.1 mg/l, and the performance can be improved and recovered by acid; the modified filtration media can remove Mn2+ efficiently under weak acid, broaden the pH scope of contact oxidation in removing manganese; the mechanism of removing manganese of modified filtration media is the autocatalytic process on the hydroxyl surface of metal oxide.