Electrodeposited Fe on Cu foam as advanced fenton reagent for catalytic mineralization of methyl orange
Vainoris, Modestas (Vilnius University, Lithuania)
Nicolenco, Aliona (Universitat Autònoma de Barcelona. Departament de Física)
Tsyntsaru, Natalia (Vilnius University, Lithuania)
Podlaha-Murphy, Elisabeth (Department of Chemical and Biomolecular Engineering Clarkson University, Potsdam, NY, United States.)
Alcaide, Francisco (Centre for Electrochemical Technologies)
Cesiulis, Henrikas (Vilnius University, Lithuania)

Data:	2022
Resum:	In many countries, the textile industry remains the major contributor to environmental pollution. Untreated textile dyes discharged into water negatively impact the performance of aquatic organisms and may cause a variety of serious problems to their predators. Effective wastewater treatment is a key to reducing environmental and human health risks. In this work, the Fe/Cu catalysts were used in heterogeneous Fenton's reaction for the degradation of high concentrations of methyl orange (model azo dye) in aqueous solutions. For the first time, the catalysts were prepared onto commercial copper foams by potentiostatic electrodeposition of iron using an environmentally friendly electrolyte. The influence of electrodeposition conditions, HO concentration, dye concentration and temperature on the model dye degradation was investigated. It was revealed that both the surface area and the catalyst loading play the major role in the effective dye degradation. The experimental results involving spectrophotometric measurements coupled with total carbon and nitrogen quantification suggest that a solution containing up to 100 mg/L of methyl orange can be successfully decolorized within 90 s at 50°C using porous Fe/Cu catalyst in the presence of hydrogen peroxide that largely surpasses the current state-of-the-art performance. Already within the first 10°min, ∼ 30% of total methyl orange concentration is fully mineralized. The described process represents a cost-efficient and environmentally friendly way to treat azo dyes in aqueous solutions.
Ajuts:	European Commission 778357
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Electrodeposition ; Enviromentally friendly ; Fe/Cu catalyst ; Heterogeneous fenton reaction ; Methyl orange
Publicat a:	Frontiers in chemistry, Vol. 10 (september 2022) , ISSN 2296-2646

DOI: 10.3389/fchem.2022.977980
PMID: 36186595

10 p, 1.9 MB

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