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Figure 1


Fig. 1. Adsorption isotherms of (a) phosphate (PO4), oxalate (OX), citrate (CIT), and sulfate (SO4) on AlSiFe at pH 5.5 and (b) PO4, OX, and SO4 on Andisol at pH 5.0, ionic strength 0.1 mol L–1 KCl and 25°C.