Using GDE modified with mixed Ru-Nb oxides for Ciprofloxacin degradation via the electro-Fenton process and its prediction model

Author(s)

Valim, R. B. ; Lourenco, J. C. ; Trevelin, L. C. ; Siqueira, A. F. ; Rodrigues, L. A. ; Rocha, R. S. ; Lanza, M. R. V.

• Document type: Journal article
• Source: JOURNAL OF WATER PROCESS ENGINEERING; v. 55, p. 10-pg., 2023-10-01.

Abstract

Ciprofloxacin (CPF) is an antibiotic widely used for treating animals and humans; when discarded into the environment, the residues of this drug cause negative effects on human and animal health and the ecosystem. The present study evaluated the application of the new carbon-based material modified with Ru-Nb oxides for H2O2 generation through electrochemical techniques, and using the best-modified material, 5.0 % Ru05Nb95O/C, for CPF degradation. The application of 5.0 % Ru05Nb95O/C for CPF degradation at the current density of 100 mA cm-2 for 120 min resulted in the degradation of approximately 100 % CPF, with the removal of 60 % of total organic carbon. The application of 0.07 mmol L-1 Fe2+ at higher current densities with an increase in degra-dation time to 720 min led to total carbon removal of approximately 100 %. Lastly, a stochastic model for predicting the time required to obtain high removals of organic matter was proposed and confirmed by long-term degradation experiments. (AU)

• FAPESP's process: 21/12053-8 - Use of sewage treatment sludge in the synthesis of active carbon modified with nanostructured oxides (Ce, Nb, Ta, and Pd ) and its application in the electrochemical generation of hydrogen peroxide
• Grantee: Julio César Lourenço
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 13/02762-5 - Development of technologies to prevent pollution: degradation and monitoring online of antibiotics in sewage
• Grantee: Robson da Silva Rocha
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 16/12597-0 - Gas difusion electrodes production modified with bimetallic oxides of Nb, Mo, Pd e Zr for the production of H2O2 in situ
• Grantee: Leandro Cesar Trevelin
• Support Opportunities: Scholarships in Brazil - Doctorate