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Fig. 3. The adsorption of (a) PO4, (b) AsO4, and (c) SO4 by gibbsite (G) and kaolinite (K) as a function of pH and ionic strength. The solid lines represent the 1-pK basic Stern optimized fit to the experimental data using the chemical models described in Tables 2, 3, and 4. The dashed lines represent the model-predicted ligand adsorption by kaolinite using the surface complexation model developed for gibbsite.
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