Device and Method for manufacturing the refined water containing selenium, germanium and its compou

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PURPOSE : Provided are a method and an apparatus for generating functional water containing rare helpful elements, which can adjust concentration of the rare elements in functional water and remove impurities, thereby producing high quality functional water. CONSTITUTION : The apparatus comprises an ionizer (10) for generating ionized solution by dissolving mineral raw material containing selenium, germanium or their compounds by solvent, a pH adjuster (20) for adjusting pH of the ionized solution, a purification unit (30) for filtering impurities in the pH-adjusted ionized solution, thereby generating purified water, and a concentration adjuster (40) for adjusting concentration of the selenium, germanium or their compound ions in the purified water by dilution using raw water. The method comprises the steps of (a) preparing selenium sulfuric acid by inputting selenium with purity of 99.9% into sulfuric acid of no less than 9 normal and heating the sulfuric acid at a temperature of 50 to 180°C to dissolve selenium into sulfuric acid in an ionizer, (b) adjusting pH of the selenium sulfuric acid to 5 to 9 by feeding caustic lime aqueous solution in a pH adjuster, (c) preparing purified solution by filtering the pH-adjusted selenium sulfuric acid using a filter with a pore size of 1.2 ± 0.8 μm, and (d) adjusting concentration of selenium using water to 0.001 to 0.05 ppm.