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Modified gas diffusion electrodes applied in the degradation of organic pollutants in a flow electrochemical reactor

Grant number: 20/13088-7
Support type:Scholarships abroad - Research Internship - Doctorate (Direct)
Effective date (Start): January 28, 2021
Effective date (End): January 27, 2022
Field of knowledge:Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
Principal researcher:Marcos Roberto de Vasconcelos Lanza
Grantee:Paulo Jorge Marques Cordeiro Junior
Supervisor abroad: Manuel Andrés Rodrigo Rodrigo
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Research place: Universidad de Castilla-La Mancha, Ciudad Real (UCLM), Spain  
Associated to the scholarship:16/19612-4 - Degradation of endocrine disruptors carbofuran, methylparaben and propylparaben via electrogenerated H2O2 and associated processes (electrogenerated H2O2/UV, electro-Fenton e photoelectro-Fenton), BP.DD


Advanced oxidative processes (POA) are based on the production of hydroxyl radicals (HO*) as oxidizing agents that are capable of degrading organic pollutants into inoculum compounds. One way of generating the hydroxyl radical is by hydrogen peroxide (H2O2). The H2O2 can be produced in high concentrations through the oxygen reduction reaction (ORR) using the gas diffusion electrodes (GDE) based on amorphous carbon black. The amorphous carbon matrix, such as Printex L6 carbon, has a high selectivity for the H2O2 generation, however there is a high energy consumption involved in this synthesis. The modification of the carbon matrix Printex L6 with porphyrinic organometallic compounds with a metallic center based on cobalt (II) allows to reduce this high energy consumption. Thus, the application of these modified GDEs in large-scale electrochemical reactors is highly feasible. This research project aims to apply the modified GDEs in flow electrochemical reactors in the degradation of organic pollutants in different AOPs systems. By optimizing both the operating parameters of the reactor and the best cathodic material, it is possible to operate the pilot-scale electrochemical reactors with less energy consumption, improving the system for the degradation of organic pollutants. The high performance liquid chromatography and the total organic carbon analyzes will allow to analyze the efficiency of the degradation, as well as helping in the proposal for the degradation route of organic pollutants. (AU)

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