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A Kinetic Model of Decoloration of Water Solution of Anthraquinone Dye Initiated by Generality Hydroxyl Radicals

Research and development

Authors:

  • Perkowski Jan
    Institute of Radiation Technology, Technical University of Łódź, Łódź, Poland
  • Kos Lech
    Tricotextil Institute of Knitted Techniques and Technologies, Łódź, Poland
  • Żyłła Renata
    Textile Research Institute, Łódź, Poland
  • Ledakowicz Stanisław
    Department of Bioprocess Engineering, Technical University of Lodz, Łódź, Poland

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Abstract:

A kinetic model of the decoloration process based on the example of a water solution of the anthraquinone dye Acid Blue 62 was proposed. The importance of decoloring water solutions for the textile industry is emphasised. The wastewater remaining after yarns and fabrics are dyed is generally too coloured for re-use in technological applications or in surface water circulation. A common schematic of the reactions initiated by a hydroxyl radical was proposed for decolouring solutions during an irradiation process in the presence of nitrous oxide, a photochemical process with hydrogen peroxide and induced by ozone. In each version of the model, a different method was considered for generating hydroxyl radicals (HO). On the basis of experimental data, the model parameters describing the decoloration process were estimated, and the experimental data were compared with theoretical calculations. A relatively good agreement of the comparison was obtained.

Tags:

dye, advanced oxidation, decoloration model, hydroxyl radical

Published in issue no 6 (54) / 2005, pages 59–64.

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