title: Synthesis and characterization of carboxymethyl-polyaminate chitosan and its adsorption behavior toward a reactive dye.
abstract: Carboxymethyl-polyaminate chitosan (DETA-CMCHS), a novel kind of amphoteric chitosan derivative, was prepared and characterized by elemental analysis, and by IR and (1)H 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 1185.71 mg/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.
authors.affiliation: School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, China.
authors.forename: Yuexia
authors.initials: Y
authors.lastname: Gu
authors.forename: Peng
authors.initials: P
authors.lastname: Song
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Weiping
authors.initials: W
authors.lastname: Sui
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D015394:Molecular Structure
chemical_list: D004396:Coloring Agents; C514968:carboxymethyl-chitosan; D048271:Chitosan