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Fig. 6. The single-ligand adsorption of (a) PO4, (b) AsO4, (c) and SO4 and the competitive binary adsorption of ligands (L) and 2-ketogluconate (kG) at equal total concentrations of 0.1 mmol L–1 and 10 g gibbsite L–1 as a function of pH and ionic strength. The solid lines represent the 1-pK basic Stern optimized fit to the experimental data. The dashed lines represent the model-predicted adsorption of kG in the binary systems using the surface complexation model developed for adsorption in the single-ligand gibbsite system.
