Photo Fenton-like oxidation of real textile wastewater: Operating conditions, kinetic modelling and cost analysis

• Published in: Chemical engineering and processing Vol. 204; p. 109951
• Main Authors: Korkmaz, Gökhan, Aktay, Nazlım, Palas, Burcu, Ersöz, Gülin, Atalay, Süheyda
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-10-2024
• Subjects: Activated carbon; Kinetic modelling; Perovskite; Photo Fenton-like oxidation; Pyrolysis; Textile wastewater treatment; Photo Fenton-like oxidation; Perovskite; Pyrolysis; Textile wastewater treatment; Activated carbon; Kinetic modelling
• ISSN: 0255-2701
• DOI: 10.1016/j.cep.2024.109951

•Pretreated real textile wastewater was subjected to photo-Fenton-like oxidation.•Photocatalytic performances of bismuth ferrite/activated carbon catalysts were compared.•56.3% and 76.2% TOC removal achieved by using BiFeO3/WAC and BiFeO3/CAC, respectively.•Kinetic data fit to a two-step second order reaction rate model in the presence of both of the catalysts.
The reusability of the pretreated textile wastewater was improved by using bismuth ferrite/activated carbon hybrid photocatalysts in photo-Fenton-like oxidation process. BiFeO3/WAC (WAC: walnut shell based activated carbon) and BiFeO3/CAC (CAC: Commercial activated carbon) catalysts were synthesized and used for the photocatalytic oxidation of in-situ pretreated textile wastewater. The influences of the mixing speed, oxidant dosage, light source, catalyst loading, and temperature were studied. The highest TOC removal efficiencies were evaluated as 56.3% and 76.2% in the presence of BiFeO3/WAC and BiFeO3/CAC, respectively. A kinetic study was performed to derive the kinetic models expressing the TOC removal as a basis for the semi-pilot and industrial scale studies. The kinetic data fit to a two-step second order reaction rate model in the presence of both of the catalysts. The activation energies of the first and the second steps were calculated as 36.0 and 16.0 kJ/mol, respectively, on BiFeO3/WAC catalyst while 43.4 and 13.3 kJ/mol of activation energies were calculated on BiFeO3/CAC.
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