| 摘要 |
PROBLEM TO BE SOLVED: To provide an adsorbent for phosphate ions which are contained in wastewater and water of rivers, lakes, marshes, etc., and causes eutrophication, a method for removing phosphate ions in water, and a method for regenerating the adsorbent. SOLUTION: (1) The phosphate ion adsorbent in which an yttrium compound is held by active carbon, (2) the method for removing phosphate ions in water using the adsorbent of (1), and (3) the method for regenerating the adsorbent in which after the phosphate ions in water are removed by the adsorbent of (1), the phosphate ions are desorbed from the adsorbent with an alkaline aqueous solution, are provided.
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