Photo Fenton Process
Mostrando 1-12 de 56 artigos, teses e dissertações.
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1. Photo-Fenton-Based Degradation of Methylene Blue Dye Using Hydroxyapatite Nanoparticles Doped with Fe3O4/γ-Fe2O3
In this study, we evaluated the catalytic properties of hydroxyapatite (HA) nanoparticles (NPs) doped with Fe3O4/γ-Fe2O3 for the degradation of methylene blue (MB) dye using a photo-Fenton process at pH 2.5, 7.0, and 9.0. The HA NPs were characterized using X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectrometry, Raman spect
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Degradation of Acid Red 8 Dye Using Photo-Fenton Reaction Mediated by Titanium Modified Catalysts
Catalysts prepared by co-precipitation of iron and titanium were evaluated in heterogeneous photo-Fenton degradation of the azo dye Acid Red 8 under blacklight irradiation. Materials with different titanium contents (0 < Ti/Fe < 0.6) were characterized using X-ray diffractometry, scanning electron microscopy, X-ray fluorescence spectroscopy, specific surface
J. Braz. Chem. Soc.. Publicado em: 21/10/2019
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3. Advanced Oxidation Processes to the Remediation of Liquid Residue from the Thermal Treatment of Oily Sludge
This work reports the remediation of a liquid residue derived from the thermal treatment of petrochemical residues by advanced oxidation processes. Firstly, degradation studies of phenol aqueous solutions by heterogeneous photocatalysis, Fenton, and photo-Fenton were conducted. Fenton processes showed a higher efficiency, mainly in the UVA photo-assisted mod
J. Braz. Chem. Soc.. Publicado em: 04/07/2019
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4. Degradação sazonal de efluentes têxteis por processo foto-Fenton solar mediado por ferrioxalato: descoloração e comportamento dos sólidos
RESUMO Neste trabalho foi avaliado o processo foto-Fenton solar mediado por ferrioxalato como tratamento primário de um efluente têxtil bruto (E1) e como um processo de polimento, após processo de lodos ativados (E2). Por um ano, ao menos uma vez por mês, a eficiência de descoloração e o comportamento dos sólidos foram avaliados sob condições natur
Eng. Sanit. Ambient.. Publicado em: 25/04/2019
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5. Use of chitosan in the remediation of water from purification of biodiesel
Abstract This article evaluates the efficiency of the degradation of pollutants present in water from the purification of biodiesel, characterized by high content of chemical oxygen demand (COD), suspended solids (SS), oils and greases, methanol, soap, and glycerol. The treatment process proposed was of the photo-Fenton type using iron immobilized in chitos
Polímeros. Publicado em: 29/11/2018
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6. Strategy for Treating a Landfill Leachate by Integration of Physico-Chemical and Photo-Fenton Processes
This study reports a protocol for the treatment of a sanitary landfill leachate through integration between a stage of coagulation-flocculation, a step of filtration of the resulting suspension, and application of the photo-Fenton process using a ferrioxalate complex and solar irradiation. The best results for turbidity removal by coagulation-flocculation we
J. Braz. Chem. Soc.. Publicado em: 2017-09
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7. Heterogeneous photo-Fenton and photocatalytic degradation studies of 2-chloro-4-nitrophenol (2Cl4NP) using foundry sand and TiO2 coated cement/clay beads
ABSTRACT Cement and clay beads coated with TiO2were used for the photo-degradation and mineralization of 2-chloro-4-nitrophenol (2Cl4NP) along with a heterogeneous solar photo-Fenton process using foundry sand (FS) as the iron source. The degradation process was optimized using slurry photocatalysis where 96% degradation of 2Cl4NP was achieved in 120 min at
Braz. J. Chem. Eng.. Publicado em: 2017-07
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8. CONTRIBUIÇÃO QUÍMICA PARA O PLANO DE GERENCIAMENTO DE ÁGUAS RESIDUAIS DE SERVIÇOS DE SAÚDE
In this study were analyzed the main lines of health care waste at the Hospital of the Federal University of Paraná (HC/UFPR), performing an inventory that aims from awareness, characterization, until a viable wastewater treatment proposal for the institution. In this context, were emphasized physical and chemical analyses parameters, inorganic species foll
Quím. Nova. Publicado em: 2017-06
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9. Treatment of Sanitary Landfill Leachate by Photo-Fenton Process: Effect of the Matrix Composition
In this study it was evaluated the role of the composition of sanitary landfill leachate on the removal of dissolved organic carbon (DOC) by photo-Fenton process. The composition of the matrix (high turbidity and color, as well as presence of inorganic ions sulfate and chloride) does not reduce the efficiency of DOC removal by photo-Fenton reactions, but inf
J. Braz. Chem. Soc.. Publicado em: 2016-12
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10. Comparing Photo-Fenton Degradation of Malachite Green Using FeII and FeIII Salts Under UVA Light Irradiation
Photo-Fenton degradation of pollutants involves the reaction of FeIIsalts with hydrogen peroxide under ultraviolet A irradiation, which significantly enhances the process. The reaction with FeIIIsalts is slower and therefore less studied. In this work, we compared the efficiencies of FeIIIand FeII salts in the photo-Fenton degradation of malachite green (MG)
J. Braz. Chem. Soc.. Publicado em: 2016-02
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11. Degradation of the commercial herbicide glyphosate by photo-fenton process: evaluation of kinetic parameters and toxicity
Parâmetros que influenciam a eficiência da degradação do glifosato (adição única de Fe2+, adição simultânea de Fe2+ e Fe3+ numa razão molar de 1:1 (Fe2+/Fe3+), adição de íons oxalato e de H2O2) foram avaliados em escala de laboratório. Efeitos sinérgicos sobre a degradação e formação de fosfato foram observados utilizando a adição simul
J. Braz. Chem. Soc.. Publicado em: 2013-09
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12. Degradation of the herbicide paraquat by photo-fenton process: optimization by experimental design and toxicity assessment
Este trabalho descreve a influência e otimização dos reagentes de Fenton (concentração de Fe2+ e H2O2) na eficiência da mineralização do herbicida paraquat (PQT, 50 mg L-1) em água, após 60 min (equivalendo a 642 kJ L-1 de radiação UVA acumulada) de tratamento por processo foto-Fenton em escala de laboratório, usando planejamento composto centra
J. Braz. Chem. Soc.. Publicado em: 2013-01