Three Binary Ion-Exchange Isotherms in Zeolite A : $Cs^+-Ag^+$ , $Ag^+-Na^+$ , and $NH_4^+-Na^+$

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 and colorimetric determinations of . Corrections for a presumed impurity of extra-lattice species in powder sample were made for the determination of . The isootherm indicates a strong selectivity for through the entire range of zeolite composition. The isotherm agrees very closely with that reported by Sherry and Walton, and that of resembles those obtained using zeolite pellets.