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UV/TiO2 photocatalytic degradation of xanthene dyes
Pereira, Luciana; Pereira, Raquel; Oliveira, Catarina S.; Apostol, Laura; Gavrilescu, M.; Pons, M. N.; Zahraa, O.; Alves, M. M.UV/titanium dioxide (TiO2) degradation of two xanthene dyes, erythrosine B (Ery) and eosin Y (Eos), was studied in a photocatalytic reactor. Photocatalysis was able to degrade 98% of Ery and 73% of Eos and led to 65% of chemical oxygen demand removal. Experiments in buffered solutions at different initial pH values reveal the pH dependence of the process, with better results obtained under acidic conditions due...
Photocatalytic and combined anaerobic–photocatalytic treatment of textile dyes
Harrelkas, F.; Paulo, A.; Alves, M. M.; Khadir, L.; Zahraa, O.; Pons, M. N.; Van der Zee, F. P.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 a...
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