Abstract
A novel polymer derived from chitosan and 1-hydroxy-2-pyridinethione-4-carboxylic acid as pendant group was prepared and characterized by different spectroscopic methods and by elemental analysis. The chelation properties of the new polymer towards the divalent metal ions (Pb2+, Cd2+, Cu2+, Ni2+, and Zn2+) in aqueous solutions was studied by a batch equilibration technique as a function of contact time, pH, mass of resin, concentration of metal ions, and particle size. The amount of metal-ion uptake of the polymer was determined by using atomic absorption spectrometry (AAS). Results of the investigation revealed that the resin exhibited higher capacities and a more pronounced adsorption toward Pb2+ and that the metal-ion uptake follows the order: Pb2+ > Cu2+ > Zn2+ > Ni2+ > Cd2+. The isothermal behavior and the kinetics of adsorption of Pb(II) ions on the resin were also investigated; the experimental data of the adsorption equilibrium from Pb(II) solution correlates well with the Langmuir isotherm equation.
Acknowledgment
This work was financially supported by the deanship of scientific research at The University of Jordan; this support is highly acknowledged.