Efficiency and Mechanism of Micro-pollution Removal by Coagulation of Iron-manganese Composited Oxide

Interface performance,charge property and structure topography of iron-manganese oxide(FeMnO) are studied.Pollution removal mechanism of the FeMnO are approached.Resultsshow that main compositions of the FeMnO are δ-manganese dioxide and ferric hydroxide.The FeMnO contains with rich hydroxyl.The specific surface area is reached to 146.22 m²/g.Zero charge point of the oxide in pure water is about 8.0 of pH value.The FeMnO particles are quasi-spherical microparticles with irregular sizes adjoined to form net construction each other.Removal rates of turbidity,TOC and UV₂₅₄ of filtered water are reached to 99.99%,42.25% and 68.91% respectively,after FeMnO coagulation.The mechanism of turbidity and organic matter removal by coagulation is combined results of multiple actions of adsorption,charge neutralization,adsorption/bridging and so on.