The equilibrium of strontium ion exchange on sodium titanate, Na4Ti9O20·xH2O

Abstract

The equilibrium of the ion exchange of strontium on sodium titanate, Na₄Ti₉O₂₀·xH₂O, has been studied. The ion exchange isotherm and selectivity coefficient showed high selecticity for strontium over sodium. The distribution coefficient was determined as a function of pH, and of the sodium and strontium concentrations. Special attention was paid to the three-component system H⁺–Na⁺–Sr²⁺, which exists in acidic to slightly alkaline solutions.