膜シリーズ　１４　　中和透析法による脱塩

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タイトル別名
  • Membrane Series. 14. Deionization by Neutralization Dialysis.
  • マク シリーズ 14 チュウワ トウセキホウ ニヨル ダツエン

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説明

In neutralization dialysis, rations are exchanged with protons across a cation-exchange membrane, while anions are exchanged with hydroxide ions across an anion-exchange membrane, and the effective deionization and the neutralization occur simultaneously on the basis of Donnan equilibrium. Weak acids and bases as well as strong electrolytes are removed effectively by this method. Aqueous silica, which is a typical inorganic weak acid and abundant in surface water, is also effectively removed by this method. The ion-exchange membranes are much more permeable to the electrolytes than the nonelectrolytes and their mutual separation is possible. Therefore, neutralization dialysis can be used for deionization of tap water and for the desalination in food industry.

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