METHOD OF PREPARING IRON-OXIDE ADSORBENT, AND METHOD OF CLEANING MOLYBDENUM-CONTAINING WASTE WATER USING THE ADSORBENT

摘要

PROBLEM TO BE SOLVED: To provide a method of preparing an iron-oxide adsorbent suitable for isolating an oxyacid ion of molybdenum contained in acidic waste water of pH2 or lower, and a method of cleaning molybdenum-containing waste water suitable for isolating an oxyacid ion of molybdenum from acidic waste water of pH2 or lower using the adsorbent.;SOLUTION: The method of preparing an iron-oxide adsorbent is characterized by adding an alkali into a solution comprising ferric ions and mixing them for neutralizing the solution to form a precipitate, drying the resulting precipitate at a temperature of 60 to 100°C to obtain a ferric hydroxide powder, and further calcining the resulting ferric hydroxide powder at a temperature of 300 to 700°C. The method of cleaning molybdenum-containing waste water comprises treating molybdenum-containing waste water by allowing it to flow through a column filled with the adsorbent and isolating molybdenum anions from the molybdenum-containing waste water.;COPYRIGHT: (C)2010,JPO&INPIT