Oxidation by-products of the C.I. Direct Blue 106 dye after ozonation

Authors

  • Polonca Lesjak Gorenje d.d., Velenje, Slovenia
  • Maja Bauman IOS, Institute for Environmental Protection and Sensors Ltd., Maribor, Slovenia
  • Mojca Poberžnik IOS, Institute for Environmental Protection and Sensors Ltd., Maribor, Slovenia
  • Mitja Kolar University of Maribor, Faculty of Mechanical Engineering, Centre of Sensor Technology, Maribor, Slovenia
  • Aleksandra Lobnik University of Maribor, Faculty of Mechanical Engineering, Centre of Sensor Technology, Maribor, Slovenia

Keywords:

ozone, coloured wastewater, C.I. Direct Blue 106, oxazine, oxidation by-products, MS-MS, LC-MS, Daphnia magna toxicity test

Abstract

The oxidation of the often used oxazine direct dye C.I. Direct Blue 106 (Direct Dye 106) in an aqueous solution (600 mgL-1) by ozonation was investigated. VIS spectra showed degradation of the oxazine groups in the initial Direct Dye 106 structure. The oxidation by-products, such as sulphate, nitrate, nitrite, chloride ions and phenolic compounds, were identified by MS-MS and the LC-MS analyses. After ozonation the wastewater containing the Direct Dye 106 showed no toxic characteristics, according to Daphnia magna test (24 h- EC50 > 75 %).

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Published

2014-08-29

How to Cite

[1]
Lesjak, P., Bauman, M., Poberžnik, M., Kolar, M. and Lobnik, A. 2014. Oxidation by-products of the C.I. Direct Blue 106 dye after ozonation. Tekstil. 63, 7-8 (Aug. 2014), 228–235.

Issue

Vol. 63 No. 7-8 (2014)

Section

Original scientific paper

License

Copyright (c) 2014 Hrvatski inženjerski savez tekstilaca

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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