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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

Grant number: 21/12053-8
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): April 01, 2022
Field of knowledge:Engineering - Sanitary Engineering - Water Supply and Wastewater Treatment
Principal Investigator:Marcos Roberto de Vasconcelos Lanza
Grantee:Julio César Lourenço
Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated research grant:22/12895-1 - Advanced processes for the degradation of emerging pollutants: catalytic materials, electroanalytical sensors and scientific dissemination, AP.TEM
Associated scholarship(s):23/04230-2 - Boosting electrochemical H2O2 generation from waste-derived activated carbon using Pd and Pt catalyst modification, BE.EP.PD


Stabilized sludge is the final waste of a production chain or from processes and is mostly thrown into landfills, without any type of viable reuse, and this project is therefore important for the environmental area, which can enable reuse of these wastes. In this point, the proposed project stands out, as it brings environmental appeal to the study where an application for such waste can become viable. The innovation of this project is both associated with the use of solid waste to obtain electrode material for pollution control processes, as well as the modification of these materials with ternary oxides to maximize H2O2 generation reactions, since only the use of oxides with 1 or 2 metals only, and it has been verified that the use of binary oxides can lead to an increase in the generation of H2O2.The project is focused on obtaining active carbon from the class II solid waste, specifically sewage treatment plant sludge, and its modification with nanostructured ternary oxides of the MxOy type, (where the metal M is composed of 3 of the following elements chemicals: Ce, Nb, Ta, and Pd), selection of the best modifiers in terms of H2O2 generation by electrochemical evaluation and characterization of these best modifiers, where the best materials will be used in the manufacture of gaseous diffusion electrodes and the generated H2O2 will be quantified by spectrophotometric technique. The results obtained from the generation of H2O2 with the gas diffusion electrodes will be compared to the results obtained with a gas diffusion electrode made with a commercial activated and modified carbon in order to prove the validity of using this solid residue for this purpose.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
VALIM, R. B.; LOURENCO, J. C.; TREVELIN, L. C.; SIQUEIRA, A. F.; RODRIGUES, L. A.; ROCHA, R. S.; LANZA, M. R. V.. Using GDE modified with mixed Ru-Nb oxides for Ciprofloxacin degradation via the electro-Fenton process and its prediction model. JOURNAL OF WATER PROCESS ENGINEERING, v. 55, p. 10-pg., . (21/12053-8, 17/10118-0, 13/02762-5, 16/12597-0)
VALIM, RICARDO BERTHOLO; CARNEIRO, JUSSARA FERNANDES; LOURENCO, JULIO CESAR; HAMMER, PETER; DOS SANTOS, MAURO COELHO; RODRIGUES, LIANA ALVARES; BERTAZZOLI, RODNEI; LANZA, MARCOS ROBERTO DE VASCONCELOS; ROCHA, ROBSON DA SILVA. Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin. Journal of Applied Electrochemistry, v. N/A, p. 15-pg., . (14/50945-4, 17/10118-0, 11/14314-1, 19/00239-0, 13/02762-5, 21/12053-8)
TREVELIN, L. C.; VALIM, R. B.; LOURENCO, J. C.; DE SIERVO, A.; ROCHA, R. S.; LANZA, M. R. V.. Using ZrNb and ZrMo oxide nanoparticles as catalytic activity boosters supported on Printex L6 carbon for H2O2 production. ADVANCED POWDER TECHNOLOGY, v. 34, n. 9, p. 10-pg., . (14/50945-4, 16/12597-0, 17/10118-0, 13/02762-5, 21/12053-8)

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