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Fe/RuO2-TiO2 films supported on carbon felt for norfloxacin degradation by heterogeneous electro-fenton process

Grant number: 20/02743-4
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): November 01, 2020
Effective date (End): October 31, 2022
Field of knowledge:Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
Principal researcher:Marcos Roberto de Vasconcelos Lanza
Grantee:Géssica de Oliveira Santiago Santos
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination, AP.TEM

Abstract

Treatment of aqueous wates using heterogeneous Electro-Fenton and Photoelectro-Fenton (Heterogeneous-EF/FEF) has recently attracted attention due to its efficiency and potential capability of application in a wide range of pH and catalyst reusability. However, the main challenge of these processes is the synthesis of cathodic materials to be stable in strongly acid pH along with less complex preparation routes. In this sense, this project aims the fabrication, characterization and application of new cathodic materials based on carbon felt modified with carbon felt and polytetrafluoroethylene (PTFE) with Fe/RuO2-TiO2 insertion for the degradation of a model endocrine disruptor, norfloxacin, through Heterogenenous-EF/PEF. For this, the cathode material will be produced by the thermal decomposition of the polymeric precursors, and the synthesis parameters such as Fe/metal oxides proportion, and deposited mass, will be optmized aiming to obtain homogeneous films of high stability, reusability and catalytic activity for the generation of hydrogen peroxide in situ. The efficient production of this specie is crucial for promoting the Fenton reaction (catalytic decomposition of H2O2 to produce highly reactive hydroxyl radicals (ÏOH)). The physical characterization of the cathodes will be performed by X-Ray Diffraction technique (XRD), Scanning Electron Microscopy coupled to X-ray Dispersive Energy (SEM-EDX). Also, the electrochemical measurements will be carried out by means of voltammetric techniques, Electrochemical Impedance Spectroscopy (EIS) and stability. The efficiency of norfloxacin degradation processes will be compared with the homogeneous process by High Performance Liquid Chromatography (HPLC) and Total Organic Carbon (TOC) content analysis. (AU)

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