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Synthesis and characterization of carboxymethyl-polyaminate chitosan and its adsorption behavior toward a reactive dye

Authors
Journal
Carbohydrate Research
0008-6215
Publisher
Elsevier
Publication Date
Volume
346
Issue
6
Identifiers
DOI: 10.1016/j.carres.2010.12.019
Keywords
  • Carboxymethyl-Polyaminate Chitosan
  • Preparation
  • Characterization
  • Reactive Blue (Rb2)
  • Adsorption Kinetics
  • Adsorption Equilibrium
Disciplines
  • Physics

Abstract

Abstract Carboxymethyl-polyaminate chitosan (DETA-CMCHS), a novel kind of amphoteric chitosan derivative, was prepared and characterized by elemental analysis, and by IR and 1H NMR spectroscopy. The adsorption behavior of Reactive Blue (RB2) on DETA-CMCHS was also studied. Results showed that the maximum value of adsorption capacity was 1185.71mg/g at pH 3. The adsorption kinetic behavior was fitted with a second-order reaction rate equation. The adsorption was an exothermic, irreversible and entropy-reduced process according to thermodynamic parameters, such as standard Gibbs free-energy change, enthalpy change, and entropy change, all of which were calculated from adsorption equilibrium data.

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