METHOD FOR PRODUCING IRON OXYHYDROXIDE AND ADSORBING MATERIAL COMPRISING IRON OXYHYDROXIDE

摘要

The present invention provides a method for advantageously producing an iron oxyhydroxide exhibiting excellent capability of adsorbing harmful substances, such as a phosphrous components and endocrine disrupting chemicals, which are contained in industrial wastewater, exhaust gases, etc., and an adsorbent material comprising the iron oxyhydroxide produced by the method as a main component. Specifically, the present invention provides an adsorbent material produced by a method comprising the steps of:
(a) adding a base to an aqueous iron ion-containing solution, adjusting the pH of the resultant mixture to 9 or less, to form a precipitate that contains an iron oxyhydroxide;
(b) drying the precipitate at a temperature of 100°C or lower to obtain an iron oxyhydroxide;
(c) contacting the resultant iron oxyhydroxide with water; and
(d) subjecting the resultant iron oxyhydroxide to a heat treatment under a gas atmosphere having an inert gas concentration of 80% or greater at a temperature of 100 to 280°C.