METHOD FOR TREATING AQUEOUS WASTEWATER CONTAINING HYPOPHOSPHOROUS ACID ION, PHOSPHOROUS ACID ION AND ITS WASTEWATER TREATING AGENT

摘要

PROBLEM TO BE SOLVED: To provide a treatment method in which phosphorus components in plating aqueous wastewater are removed to be recovered and result, and a treating agent for the wastewater. ;SOLUTION: Wastewater of an aqueous solution of 4-14pH containing at least one kind selected from hyphophosphorous acid ion and phosphorous acid ion is subjected to a hydrothermal reaction in a closed pressure container in the presence of at least one kind of metal ion selected from nickel ion, cobalt ion, and copper ion. The hypophosphorous acid ion and the phosphorous acid ion are oxidized into orthophosphoric acid ion.;COPYRIGHT: (C)1998,JPO