Zum Ionenaustausch einwertiger Kationen an synthetischen Natriumpolysilicaten mit Schichtstruktur

Ion Exchange of Monovalent Cations in Synthetic Sodium Polysilicates with Layer Structure Cation-exchange equilibria of synthetic sodium polysilicates Ilerit (Na₂O · 8.3SiO₂ 8.9 H₂O) and Magadiite (Na₂O · 13 SiO₂ · 6.8 H₂O) with H⁺, Li⁺ and K⁺ Ions were investigated with respect to their selectivity behaviour. The range of ion selectivity is: H⁺ > Na⁺ > Li⁺ > K⁺. Thermodynamic data ΔG, ΔH, and ΔS were determined by means of the integral thermodynamic equilibria constants K_th of the ion-exchange reactions.