Figure 5
From: Surface complexation modeling of Cu(II) adsorption on mixtures of hydrous ferric oxide and kaolinite
Cu adsorption as a function of pH on kaolinite. Solid concentration is 2 g/L unless noted otherwise. Lines indicate fits for 2-site model with formation of a bidentate Cu complex on a variable charge site and an ion exchange site that that does not bind Cu for (A) KGa and (B) Wards data. Model fits calculated using parameters shown in Tables 1 and 2. Replicate experiments (0.1 M NaNO3 and 10-5 M Cu; 0.1 M NaNO3 and 10-4 M Cu; 0.02 M NaNO3 and 10-5 M Cu;) are distinguished by separate symbols.