Ca–K–H exchange on silt-, clay- and silt + clay-size soil separates

Abstract

Two approaches to predicting selectivity coefficients for heterogeneous ion-exchanger mixtures have been tested for a ternary ion-exchange system: weighted arithmetic mean and weighted geometric mean. If changes in mixture-component selectivity coefficients were estimated, following either approach yielded accurate selectivity coefficient predictions. The weighted geometric mean approach is far easier to apply when modelling multicomponent ion-exchange systems.