Abstract
The study described herein aimed to investigate the homogeneous (Fenton/UV-C) and heterogeneous (TiO2/UV-A) advanced oxidation of commonly used reactive dyestuffs in simulated dyebath effluents. For the Photo Fenton (Fe2+/H2O2/UV-C) reaction the effect of the initial H2O2 dose on the oxidative reaction rates was examined. Further, the photocatalytic treatment efficiency of two novel anatase TiO2, powders (Millennium PC 500 and Sachtleben Mikroanatas) and platinized Degussa P25 TiO2, type were compared with that of the more conventional P25 at different reaction pH’s. In the case of the Photo Fenton reactions, the treatment performance was strongly affected by the initial H2O2, concentration, whereas for the TiO2/UV-A process only the PC 500 TiO2, powder exhibited a significantly pH dependent reaction efficiency. The decolourization rates followed the decreasing order of Fenton/UV-C > Pt-P25/UV-A > Mikroanatas/UV-A > P25/UV-A > PC 500/UV-A, whereas the decreasing order for TOC removal efficiency was Fenton/UV-C > Mikroanatas/UV-A > Pt-P25/UV-A > P25/UV-A > PC 500/UV-A for the selected reaction conditions. Removal of optical density at 254 nm wavelength ranged between 75 % (Mikroanatas/UV-A) and 96 % (P25/UV-A).
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Arslan, I., Balcioglu, I., Tuhkanen, T., Bahnemann, D.W. (2000). Photochemical and Photocatalytic Detoxification of Reactive Dyebath Wastewater by the Fenton’s Reagent and Novel TiO2 Powders. In: Hahn, H.H., Hoffmann, E., Ødegaard, H. (eds) Chemical Water and Wastewater Treatment VI. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59791-6_27
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DOI: https://doi.org/10.1007/978-3-642-59791-6_27
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