Banca de DEFESA: JUSSARA CÂMARA CARDOZO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JUSSARA CÂMARA CARDOZO
DATE: 30/09/2022
TIME: 10:00
LOCAL: videoconferência
TITLE:

Electrochemical oxidation of emerging pollutants: voltammetric studies and green hydrogen production.

KEY WORDS:

ELECTROCHEMICAL OXIDATION, BDD, EMERGING POLLUTANTS, GREEN HYDROGEN.

PAGES: 150
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Eletroquímica
SUMMARY:

Electrochemical advanced oxidative processes are effectively used to treat effluents containing organic pollutants. In this work, the electrochemical oxidation of pharmaceuticals and dye, in aqueous media was studied. The electroanalytical studies showed that for the drug Olanzapine, both direct and indirect oxidation processes can occur using the boron-doped diamond electrode, confirming the versatility of this electrode. The parameters investigated were the influence of the supporting electrolyte, pH and current density while the analytical methods used to analyze the degradation of the pollutants were UV-Vis spectroscopy, chemical oxygen demand (COD), total organic carbon (TOC) and high-efficiency chromatography (HPLC), obtaining results with a removal percentage higher than 90%. For the production of hydrogen, the electrochemical experiments were performed in an electrochemical cell of two compartments separated by a Nafion membrane, where it was possible to perform the oxidation of the calcon dye and simultaneously produce hydrogen in the cathode compartment. The results of the electrochemical oxidation of calcon dye, using a BDD electrode demonstrated that the application of this electrode proved to be very efficient, where the significant concentration of hydroxyl radicals -OH formed in the BDD effectively attacks the dye, promoting a great performance of oxidation, since it not only reduced the color of the effluent but also led to its mineralization. Regarding hydrogen production, the results showed that the speed of H2 production is dependent on the applied current and electrolysis time, showing faradaic efficiency of over 90% during the process.

COMMITTEE MEMBERS:
Interno - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE
Presidente - 348475 - DJALMA RIBEIRO DA SILVA
Externa ao Programa - 2275848 - ELISAMA VIEIRA DOS SANTOS - nullExterno à Instituição - MARCO ANTONIO QUIROZ ALFARO - udlap
Externo à Instituição - SUZANA MARIA LOURES DE OLIVEIRA MARCIONILIO - IFGoiano