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

Figure 7

(a) The PFO, PSO, Elovich, and (b) intraparticle diffusion models for Pd(II) adsorption onto PEI-CSH (experimental conditions: pH 2; volume of solution, 60 mL; mass of adsorbent, 120 mg; and initial Pd(II) concentration, 200 mg/L).

(a)

(b)