TREATMENT OF ACIDIC WATER CONTAINING DISSOLVED FERROUS CATIONS

摘要

A water treatment process for raw water containing dissolved Fe<2+> and H<+> cations to reduce the Fe<2+> cation concentration therein involves oxidation of the Fe<2> cations to Fe<3+> cations with the formation in the water of solid Fe(OH)3 from the Fe<3+> cations. The process comprises the steps of oxygenating the water and raising the pH of the water. The oxidation of the Fe<2+> cations and the fromation of the Fe(OH)3 are carried out in the presence of suspended particulate material in the water, the particulate material being present in the water at a concentration of at least 5g/l.