Correlations of heterogeneity parameters for single-solute and multi-solute adsorption from dilute solutions

Abstract

Solute adsorption from dilute solutions is considered in terms of a new description of physical adsorption from multicomponent mixtures on heterogeneous solids. This description requires that the type of adsorption energy variability is similar for all components of the mixture on different surface sites. The theoretical equations are used to predict the heterogeneity parameter for a multi-solute adsorption system by means of the het-erogeneity parameters which characterize the suitable single-solute adsorption systems. This prediction procedure is examined by using the experimental isotherms of organic solute adsorption from dilute aqueous solutions on activated carbons.