Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Three Binary Ion-Exchange Isotherms in Zeolite A : $Cs^+-Ag^+$ , $Ag^+-Na^+$ , and $NH_4^+-Na^+$

  • Heo, Nam-Ho (Department of Industrial Chemistry, Kyungpook National University) ;
  • Kim, Yang (Department of Chemistry, Pusan National University) ;
  • Lin, Gloria C.H. (Department of Chemistry, University of Hawaii at Manoa) ;
  • Seff, Karl (Department of Chemistry, University of Hawaii at Manoa)
  • Published : 1990.10.20
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Abstract

Three binary ion-exchange isotherms of zeolite A have been determined using 0.1 M solutions of the aqueous nitrates for the one-step preparation of particular mixed-cation zeolite A compositions. Analyses were done primarily by flame emission spectrometry (FES), together with crystallographic determinations of $Cs^+$ and colorimetric determinations of $NH_{4^+}$. Corrections for a presumed impurity of extra-lattice species in powder sample were made for the determination of $Na^+$. The $Cs^+-Ag^+$ isootherm indicates a strong selectivity for $Ag^+$ through the entire range of zeolite composition. The $Ag^+-Na^+$ isotherm agrees very closely with that reported by Sherry and Walton, and that of $NH_{4^+}-Na^+$ resembles those obtained using zeolite pellets.

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