Abstract
Given scanty literature in the chosen field of work, this work details upon Pd(II) adsorption characteristics from complex waste solutions to prepare Pd(II) impregnated chitosan for catalysis applications. The solution chemistry complexity was addressed in terms of the effect of ethylenediaminetetraacetic acid (EDTA), ammonium hydroxide (NH4OH), and surfactant (cetyl trimethyl ammonium bromide (CTAB)) on the adsorption and desorption characteristics of Pd(II) on chitosan. The batch adsorption studies were conducted with pH, Cl−, adsorbent dosage, contact time, Pd(II) concentration and temperature variation from 0.75–10, 33–500mgL−1, 0.2–2gL−1, 5–840min and 50–300mgL−1 and 25–60°C, respectively. The evaluated batch adsorption characteristics were tested for fitness with appropriate equilibrium, kinetic, and thermodynamic models to evaluate upon the role of solution complexity in influencing adsorption mechanism. Finally, Pd(II) desorption characteristics were evaluated using 0.1–2N NaOH solutions.
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