Journal
CHEMOSPHERE
Volume 72, Issue 11, Pages 1816-1822Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2008.05.026
Keywords
anthraquinone dyes; autoxidation; azo dyes; COD removal; phthalocyanine dyes; titanium dioxide
Categories
Funding
- VOLLUBILIS [MA/02/49]
- PES-SOA [10807XH]
- Portuguese Fundacao para Ciencia e a Tecnologia [SFRH/BPD/18748/2004]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/18748/2004] Funding Source: FCT
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A photocatalytic process based on immobilized titanium dioxide was used to treat crude solutions of azo, anthraquinone and phthalocyanine textile dyes. In addition, the process was applied to the treat autoxidized chemically reduced azo dyes, i.e. representatives of recalcitrant dye residues after biological sequential anaerobic-aerobic treatment. Photocatalysis was able to remove more than 90% color from crude as well as autoxidized chemically reduced dye solutions. UV-absorbance and COD were also removed but to a lower extent (50% in average). The end products of photocatalytic treatment were not toxic toward methanogenic bacteria. The results demonstrate that photocatalysis can be used as a pre- or post-treatment method to biological anaerobic treatment of dye-containing textile wastewater. (C) 2008 Elsevier Ltd. All rights reserved.
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