Application of pyridine-modified chitosan derivative for simultaneous adsorption of Cu(II) and oxyanions of Cr(VI) from aqueous solution

The bioadsorbent C1, which is a chitosan derivative prepared in one-step synthesis, was successfully used to adsorb Cr(VI) and Cu(II) simultaneously. Here, for the first time simultaneous adsorption of cation an anion modeled using Corsel model kinetics Real Adsorbed Solution Theory equilibrium data. Batch studies single binary aqueous solutions were performed as function initial solute concentration, contact time, solution pH. maximum capacities C1 1.84 1.13 mmol g−1 3.86 0.98 Cr(VI), respectively. reuse investigated, with ions being almost completely desorbed fully re-adsorbed. For desorption incomplete resulting lower re-adsorption. Energy-dispersive X-ray spectroscopy mapping distributions adsorbed on surface systems. Isothermal titration calorimetry experiments solutions. thermodynamic parameters showed that both metal enthalpically driven, but entropically unfavorable.