Cation exchange characteristics of porous vycor glass.

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  • 多孔質バイコールガラスのカチオン交換特性
  • タコウシツ バイコール ガラス ノ カチオン コウカン トクセイ

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Abstract

The adsorption characteristics of several cations on porous Vycor glass were investgated by the measurement of adsorption quantity, released proton and pH in the liquid phase.<BR>The calculated apparent exchange equilibrium constants of sodium ion suggested that weak acid sites were distributed in uniform proportion on Vycor glass.<BR>In the case of a heavy metal ammine complex, adsorption quantity was influenced remarkably by the pH dependence of complex concentration. The adsroption mechanism was successive ligand substitution between ammonia ligand and surface silanol group. The adsorption was stabilized by the chelating effect. The tetra-ammine-platinic ion was adsorbed by single ligand substitution. The apparent figure of the exchange equilibruum constant showed that platinic ion was adsorbed stably.

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