Banca de DEFESA: MARCELO CAPISTRANO COSTA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARCELO CAPISTRANO COSTA
DATE: 29/06/2022
TIME: 14:00
LOCAL: Campus Arapiraca
TITLE:

Study of Phenol Degradation by Electrochemical and Photoelectrochemical Techniques

KEY WORDS:

Degradation of pollutants, Phenol, Advanced Oxidative Processes.

PAGES: 62
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Eletroquímica
SUMMARY:

Phenol is an aromatic compound of industrial importance, with its structural properties being able to be used in a variety of products, such as medicines and agrochemicals. As it is an environmental contaminant solution that is difficult to remove by conventional methods of water treatment, its presence in a combination of its treatment alternatives for new technologies for reduction. The present study aimed to carry out the work of phenol degradation through electrochemical and photochemical tests by ultraviolet (UV) irradiation and advanced oxidative processes (AOPs). The electrochemistry, advanced photoelectrochemical photochemistry, study evaluated the manufacturing of oxidative processes employing H2O2 as an oxidizing agent. The tests were carried out in a glass reactor equipped with a 13 W UV lamp with radiation emission at 254 nm used in the photochemical tests. In the electrochemical evaluation, three current densities were followed (10, 20, and 30 mA cm-2) using Na2SO4 as an electrolyte, in which a density of 10 mA cm-2 was chosen for the electrochemical evaluation. Phenol monitoring was monitored in a spectrophotometer with spectral scanning between 250 and 800 nm and by LC. Through the analysis of time analysis, comparisons of degradation products were made in times: 60 minutes, 120, and 120 minutes. The reduction of phenol was verified in all estimates, but it was not significant in the tests, in addition to presenting a reduction of its electrochemical concentration in the reaction medium, using the oxidant H2O2. In the photochemical, photochemical, and photochemical tests performed, there was a reduction of phenol, with greater efficiency with the reduction of tests performed, with H2O2. Appreciable also of these nodes with UV and H2O2 irradiation. Thus, the tests with photochemical and electrochemical components combined with AOPs proved to be efficient in the decomposition of phenol and degradation products.

BANKING MEMBERS:
Interno - 1609640 - VINICIUS DEL COLLE
Externa ao Programa - 1320545 - THAISSA LUCIO SILVA
Externo à Instituição - JOÃO PAULO TENÓRIO DA SILVA SANTOS - UFAL