Aluminium ions at polyelectrolyte interfaces. II. Role in the surface-area-exclusion chromatography of humic acid

Abstract

Surface-area-exclusion chromatography using Whatman glass microfibre filters modified by adsorption of aluminium ions as a stationary phase was used to evidence the different interfacial behaviour of aluminium ion complexed (tritium labelled) humic acids. Histograms with adsorption peaks, plateaux and humps on the stationary phase showed the various adsorption characteristics of the modified humic acid. The absence of adsorption for those constituents which were recovered in the effluent showed the very low degrees of complexation by aluminium ions to be responsible for the absence of interaction of the components with the stationary phase.