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  • 1 Comenius University Faculty of Natural Sciences 842 15 Bratislava Slovak Republic
  • | 2 Slovak Technical University Faculty of Chemical Technology 812 37 Bratislava Slovak Republic
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The aim of this study was to evaluate the quantitative and qualitative influence of some ions (ammonium, cesium, barium) on the adsorption capabilities of natural and chemically modified clinoptilolite towards Cs and Ba ions. Na–Cs–Ba — ternary ion-exchange isotherms at 23 °C were measured and plotted in a triangular diagram. Using statistical methods, linearized forms of isotherms (Freundlich, Langmuir, BET) for the systems studied are given.