| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for efficiently recovering metal ions in an aqueous solution without using organic solvents and chemicals. SOLUTION: The method for recovering metal ions comprises a process for precipitating the metal ions as carbonates by injecting and dispersing carbon dioxide gas into a liquid in which the metal ions are dissolved through a porous body, and generating the bubbles of the carbon dioxide gas in the liquid. The porous body has pores with a value determined by dividing a pore diameter at which the pore volume accounts for 10% of the total pore volume in the relative cumulative pore distribution curve of the porous body by a pore diameter at which the pore volume accounts for 90% of the total pore volume is 1-1.5. COPYRIGHT: (C)2007,JPO&INPIT
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