Enhancing Sustainability in Advanced Oxidation Processes: CoFe 2 O 4 as a Catalyst Reinforcement for Tartrazine Dye Degradation

Matheus Londero da Costa, Dison Stracke Pfingsten Franco, William Leonardo da Silva, Jordana Georgin () and Jivago Schumacher de Oliveira
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Matheus Londero da Costa: Applied Nanomaterials Research Group (GPNAp), Nanoscience Graduate Program, Franciscan University (UFN), Santa Maria 97010-491, RS, Brazil
Dison Stracke Pfingsten Franco: Applied Nanomaterials Research Group (GPNAp), Nanoscience Graduate Program, Franciscan University (UFN), Santa Maria 97010-491, RS, Brazil
William Leonardo da Silva: Applied Nanomaterials Research Group (GPNAp), Nanoscience Graduate Program, Franciscan University (UFN), Santa Maria 97010-491, RS, Brazil
Jordana Georgin: Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 58 # 55–66, Barranquilla 080002, Atlántico, Colombia
Jivago Schumacher de Oliveira: Applied Nanomaterials Research Group (GPNAp), Nanoscience Graduate Program, Franciscan University (UFN), Santa Maria 97010-491, RS, Brazil

Sustainability, 2024, vol. 17, issue 1, 1-20

Abstract: Globalization has increased production in various industries, including textiles, food, and pharmaceuticals. These industries employ different dyes in production, leading to undesired discharge, which conventional treatment fails to remove from the water. The present study aims to synthesize, characterize, and use different pure catalysts (TiO 2 and Zn 2 SnO 4 ) and their compounds doped with CoFe 2 O 4 together with ozone (O 3 ) for the degradation of the azo dye yellow tartrazine (TZ), evaluating the process. For this characterization, N 2 porosimeter, zeta potential, X-ray diffraction, SEM-EDS, and diffuse reflectance spectra were used. Specific surface areas (m 2 g −1 ) of 109, 106, 65, and 83 were used for TiO 2 , CoFe 2 O 4 /TiO 2 , Zn 2 SnO 4 , and CoFe 2 O 4 /Zn 2 SnO 4 , respectively. Both compounds are characterized as nanocatalysts as they have a band gap of 2.75 and 2.83 eV and average particle size of 98 and 85 nm for CoFe 2 O 4 /TiO 2 and Zn 2 SnO 4 , respectively. We employed a reactional model, which was able to describe the catalytic ozonation for all cases, with a low R 2 of 0.9731. The combination of processes increased TZ degradation from 57% to 74% compared to O 3 alone, achieving a maximum degradation of 98.5% within 50 min of catalysis at a low ozone flow rate. This highlights the potential of the produced catalysts for energy-efficient effluent treatment.

Keywords: sustainable catalysts; photocatalysis; ozonation; degradation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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