Cation-Exchange Selectivity for K+, Mg2+, and Ca2+ Ions on Sodium-Substituted Taeniolite

Michihiro Miyake, Takayuki Suzuki, Takashi Suzuki

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6 Citations (Scopus)


The cation-exchange selectivity for K+, Mg2+, and Ca2+ ions on Na-substituted taeniolite, which is one of the fluormicas with swelling property, has been investigated. The distribution coefficient for each cation was numerically estimated at infinitesimal loading based on the Kielland plots for the Na+ → K+, 2Na+ → Mg2+, and 2Na+ → Ca2+ exchanges. The separation factors for K+−Mg2+ and K+−Ca2+ pairs, which are the ratios of the distribution coefficients, were found to be 9.1 X 107 and 1.4 X 108, respectively. The high K+ ion separation effect on Na-substituted taeniolite was also supported by the experimental results made in the presence of Na+, Mg2+, and/or Ca2+ ions. Na-substituted taeniolite was, therefore, shown to be useful for the separation and immobilization of K+ ions.

Original languageEnglish
Pages (from-to)1327-1331
Number of pages5
JournalChemistry of Materials
Issue number9
Publication statusPublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry


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