| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for substantially completely adsorbing to remove a tetraalkyl ammonium ion (TAA ion) by an ion exchange resin regardless of the presence of coexistent ions and a pH of the drainage, and also easily regenerating the ion exchange resin after use when water is recovered from the drainage containing the TAA ions. SOLUTION: Treated water cleard of the TAA ions is obtained by bringing the drainage containing the TAA ions into contact with a strong basic anion-exchange resin which mixes one form or more of an OH form, a bicarbonate form and a carbonate form, and thereafter bringing into contact with a weak acid cation-exchange resin. COPYRIGHT: (C)2006,JPO&NCIPI
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