Recovery of Palladium from Acidic Solution Using Polyethylenimine-Crosslinked Calcium Silicate Hydrate Derived from Oyster Shell Waste: Adsorption and Mechanisms

Figure 6

The isotherm models for Pd(II) adsorption onto PEI-CSH (experimental conditions: pH 2; volume of solution, 30 mL; mass of adsorbent, 60 mg; and initial Pd(II) concentration range, 30-700 mg/L).