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Volume 12
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10.3390/catal12060644
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Article

Decolorization and Oxidation of Acid Blue 80 in Homogeneous and Heterogeneous Phases by Selected AOP Processes

by
Jiří Palarčík
1,
Olga Krupková
1,
Petra Peroutková
1,
Jan Malaťák
2,
Jan Velebil
2,
Jaromíra Chýlková
1 and
Libor Dušek
1,*
1
Institute of Environmental and Chemical Engineering, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
2
Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague, Czech Republic
*
Author to whom correspondence should be addressed.
Catalysts 2022, 12(6), 644; https://doi.org/10.3390/catal12060644
Submission received: 29 April 2022 / Revised: 7 June 2022 / Accepted: 8 June 2022 / Published: 12 June 2022
(This article belongs to the Special Issue Catalysis for the Removal of Water Pollutants)
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Abstract

This paper is a kinetic study that compares the rate of decolorization and subsequently the mineralization of Acid Blue 80 in model dyeworks wastewater, both in the homogeneous phase using the Fenton and photo-Fenton reactions, UV-C and UVC/H2O2 processes, and in the heterogeneous phase, where the proven commercial photocatalysts P25, P90, and AV01 based on TiO2 were used. The influence of pH of the environment was studied and in the case of the Fenton reaction, the influence of the concentration of catalyzing Fe2+ ions on the rate of decolorization of the model wastewater was also studied. The optimal molar ratio of H2O2/Fe2+ was 10:1. For describing the reaction kinetics, first-order speed constants were best-suited. In all applied processes, the dye chromophore degraded, which was accompanied by a quantitative decolorization of the model wastewater. Subsequently, the mineralization of colorless intermediate products was studied through a decrease in COD or, more precisely, TOC. The mineralization efficiency in the homogeneous phase ranged between 18.6 and 97.1% after 24 h. In the case of heterogeneous photocatalysis, it ranged between 79.6 and 97.3% after 24 h, with efficiency declining in the order P90 > P25 > AV01.
Keywords: Acid Blue 80; Fenton oxidation; dye photolysis; photocatalytic oxidation Acid Blue 80; Fenton oxidation; dye photolysis; photocatalytic oxidation

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MDPI and ACS Style

Palarčík, J.; Krupková, O.; Peroutková, P.; Malaťák, J.; Velebil, J.; Chýlková, J.; Dušek, L. Decolorization and Oxidation of Acid Blue 80 in Homogeneous and Heterogeneous Phases by Selected AOP Processes. Catalysts 2022, 12, 644. https://doi.org/10.3390/catal12060644

AMA Style

Palarčík J, Krupková O, Peroutková P, Malaťák J, Velebil J, Chýlková J, Dušek L. Decolorization and Oxidation of Acid Blue 80 in Homogeneous and Heterogeneous Phases by Selected AOP Processes. Catalysts. 2022; 12(6):644. https://doi.org/10.3390/catal12060644

Chicago/Turabian Style

Palarčík, Jiří, Olga Krupková, Petra Peroutková, Jan Malaťák, Jan Velebil, Jaromíra Chýlková, and Libor Dušek. 2022. "Decolorization and Oxidation of Acid Blue 80 in Homogeneous and Heterogeneous Phases by Selected AOP Processes" Catalysts 12, no. 6: 644. https://doi.org/10.3390/catal12060644

APA Style

Palarčík, J., Krupková, O., Peroutková, P., Malaťák, J., Velebil, J., Chýlková, J., & Dušek, L. (2022). Decolorization and Oxidation of Acid Blue 80 in Homogeneous and Heterogeneous Phases by Selected AOP Processes. Catalysts, 12(6), 644. https://doi.org/10.3390/catal12060644

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