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Adsorption Behavior of Cadmium, Zinc, and Lead on Hydroxyaluminum– and Hydroxyaluminosilicate–Montmorillonite Complexes

^a Faculty of Agriculture, Kochi Univ., B 200 Monobe, Nankoku 783-8502, Kochi, Japan
^b United Graduate School of Agricultural Science, Ehime Univ., Matsuyama 790-8566, Japan

View larger version (20K): [in a new window]   Fig. 1. Fractional adsorption of the metals as a function of pH. HAS, hydroxyaluminosilicate; HyA, hydroxyaluminum; Mt, montmorillonite

View larger version (43K): [in a new window]   Fig. 4. The amounts of total, strongly, and weakly adsorbed metals on the clays as a function of pH: (a, b, c) Cd adsorption; (d, e, f) Zn adsorption; (g, h, i) Pb adsorption. HAS, hydroxyaluminosilicate; HyA, hydroxyaluminum; Mt, montmorillonite

View larger version (20K): [in a new window]   Fig. 2. Kurbatov plots for metal adsorption on the clays. HAS, hydroxyaluminosilicate; HyA, hydroxyaluminum; Mt, montmorillonite

View larger version (17K): [in a new window]   Fig. 3. Diagram of ion activity product (IAP) relative to metal (M) hydroxide [IAPM(OH)2] for the metal adsorption systems