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Description of the Adsorption and Desorption of Black 5 onto Chitin and Chitosan − Isotherm Equations

Research and development

Author:

• Filipkowska Urszula
  Department of Environmental Protection Engineering, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland

Full text

Abstract: The sorption and desorption of a reactive dye − Black 5, commonly used in the textile industry, from aqueous solutions onto chitin and chitosan was studied. Following the adsorption of the dye at pH 3, its desorption was carried out at pH 11. Equilibrium isotherms were analysed using the following isotherms: the Freundlich, the Langmuir, the two-site Langmuir and the three-parameter Redlich-Peterson. All four isotherm equations showed a good fit to experi-mental data. The best-fiting isotherm was the two-site Langmuir, i.e. the heterogeneous model.

Tags: adsorption, chitin, chitosan, reactive dye Black 5, isotherm equations.

Citation: Filipkowska U.; Description of the Adsorption and Desorption of Black 5 onto Chitin and Chitosan − Isotherm Equations. FIBRES & TEXTILES in Eastern Europe 2010, Vol. 18, No. 5 (82) pp. 105-109.

Published in issue no 5 (82) / 2010, pages 105–109.