Title
Comparative sorption of Co₂₊ Ni₂₊ and Cr₃₊ onto chitosan/poly(vinyl amine) composite beads
Authors
ANA IRINA COCARTA VASILE GUTANU and ECATERINA STELA DRAGAN

Received October 29, 2014
Published Volume 49 Issue 9-10 October-December
Keywords composite, chitosan, poly(vinyl amine), metal uptake

Abstract
The aim of the present study was to investigate the adsorption properties of chitosan (CS)/poly(vinyl amine) (PVAm) composites in aqueous solutions containing Co₂₊, Ni₂₊ or Cr₃₊ ions. Adsorption of metal ions onto the CS/PVAm composite beads was investigated in batch mode. The effects of initial pH, and of the initial metal ion solution concentration were studied. The equilibrium data obtained for the adsorption of all metal ions onto CS/PVAm composite fitted well the Langmuir model with a maximum theoretical adsorption capacity of 153.35 mg Cr₃₊/g composite, 143.73 mg Ni₂₊/g composite, and 67.89 mg Co₂₊/g composite, respectively.