Equilibrium studies of the sorption of Cu(II) ions onto chitosan

J. C.Y. Ng, W. H. Cheung, G. McKay*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

392 Citations (Scopus)

Abstract

Chitosan is a polymer that can be obtained from the shells of seafood such as prawns, crabs, and lobsters. Chitosan has free amino groups, which can attract metal ions, and has been used as an adsorbent for the removal of metal ions from effluents. In this research, the sorption of copper ions from solution onto chitosan at two pHs has been investigated. DSC, TGA, surface area, SEM, and NMR studies have been used to report the pure physical states of chitosan and the chitosan-copper complex. The experimental isotherm data were analyzed using the Langmuir, Freundlich, and Redlich-Peterson equations. Correlation coefficients were determined for each isotherm analysis. Error functions have been used to determine the alternative single component parameters by nonlinear regression due to the inherent bias in using the correlation coefficient resulting from linearization. The error function method provided the best parameters for the isotherm equations in this system and is demonstrated for error comparison purposes.

Original languageEnglish
Pages (from-to)64-74
Number of pages11
JournalJournal of Colloid and Interface Science
Volume255
Issue number1
DOIs
Publication statusPublished - 2002
Externally publishedYes

Keywords

  • Adsorption
  • Chitin
  • Chitosan
  • Copper

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