Chelation of chitosan derivatives with zinc ions. I. O,N-carboxymethyl chitosan

The chelation between O,N-carboxymethyl chitosan (ONCMCh) and zinc sulfate in aqueous solution was studied by kinetic experiments and characterized by inductively coupled plasma (ICP) and UV spectrophotometry. The experimental data indicated that the chelating processes were greatly controlled by the reaction conditions (i.e., reaction time, temperature, and Zn2+ ionic and ligand concentrations). The consequence of chelating Zn2+ onto ONCMCh was the formation of complexes with different solubilities. The favorable complexes for ONCMCh-Zn2+ chelate were at the low zinc ionic and ligand concentrations, as well as at the appropriate temperature. The evidence provided by the kinetic parameters and the changes in zinc concentration by ICP analysis further confirmed the plausible complexing mechanisms. While the formation of water-soluble products was occasioned by the electrostatic attraction mechanism, the water-insoluble products were predominantly formed by chelation of Zn2+ with O,N-carboxymethyl chitosan. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2246–2253, 2000

[1]  M. Goosen,et al.  Microcapsules/Microspheres Related to Chitosan , 1995 .

[2]  T. Mitani,et al.  Synthesis of chitosan-amino acid conjugates and their use in heavy metal uptake. , 1995, International journal of biological macromolecules.

[3]  M. Gómez-Guillén,et al.  Preparation and chelating properties of derivatives of chitosan and 1,3-dicarbonyl compounds , 1994 .

[4]  R. Muzzarelli,et al.  Solubility and structure of N-carboxymethylchitosan. , 1994, International journal of biological macromolecules.

[5]  D. Oliver,et al.  Enhancement of the metal-binding properties of chitosan through synthetic addition of sulfur- and nitrogen-containing compounds , 1993 .

[6]  H. Yoshida,et al.  Adsorption of metal ions on polyaminated highly porous chitosan chelating resin , 1993 .

[7]  G. Mckay,et al.  Transport studies for the sorption of copper ions by chitosan , 1993 .

[8]  C. Peniche-Covas,et al.  The adsorption of mercuric ions by chitosan , 1992 .

[9]  M. Gómez-Guillén,et al.  A derivative of chitosan and 2,4-pentanedione with strong chelating properties , 1992 .

[10]  M. Venanzi,et al.  Copper complexes immobilized to chitosan. , 1992, Journal of inorganic biochemistry.

[11]  Chitosan,et al.  Advances in chitin and chitosan , 1992 .

[12]  Takayoshi Matsumoto,et al.  Molecular mode of complexation between carboxymethylchitin and the copper(II) ion in aqueous systems , 1992 .

[13]  I. Yamaguchi,et al.  Endogenous Gibberellins of Young Developing and Abscising Fruits of Carica papaya L. , 1991 .

[14]  L. Iyengar,et al.  Hexavalent chromium interaction with chitosan , 1990 .

[15]  R. Muzzarelli,et al.  Removal of trace metal ions from industrial waters, nuclear effluents and drinking water, with the aid of cross-linked N-carboxymethyl chitosan , 1989 .

[16]  Y. Koyama,et al.  Studies on Chitin XVI. Influence of Controlled Side Chain Introduction to Chitosan on the Adsorption of Copper(II) Ion , 1988 .

[17]  L. Iyengar,et al.  Removal of Cadmium Using Chitosan , 1988 .

[18]  R. Zall,et al.  Absorption of metals by natural polymers generated from seafood processing wastes , 1984 .