Banca de QUALIFICAÇÃO: ROSSINE FERREIRA DA SILVA JUNIOR

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ROSSINE FERREIRA DA SILVA JUNIOR
DATA : 30/03/2023
HORA: 19:00
LOCAL: https://meet.google.com/xpp-wyci-vug
TÍTULO:

Use of advanced oxidative processes (AOP's) in the degradation of the macrolide azitromycin.

PALAVRAS-CHAVES:

Azithromycin. Effluent. Advanced Oxidative Processes

PÁGINAS: 90
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

The use of antibiotics has grown since the creation of penicillin, with that, numerous classes of antibiotics were created and used indiscriminately. Among them is azithromycin, which is a macrolide antibiotic derived from erythromycin and is used in the treatment of bacterial infections of the respiratory tract, urinary tract and skin. With the incidence of the pandemic in 2019, its use by the population increased, which can lead to greater contamination of this drug in water bodies, marine life and result in resistant strains of bacteria. Conventional methods of effluent treatment used in ETAs are not enough to remove azithromycin, therefore, this work proposes the use of Advanced Electrooxidative Processes (AEPs) in the degradation study of this antibiotic using a dimensionally stable anode (Ti/TiO2.IrO2.RuO2 ) in the degradation of synthetic samples of azithromycin (86 mg.L-1) in Na2SO4 medium (0.05 mol.L-1). In this study, three current densities (20, 40 and 60 mA.cm-2) and three different pH (4, 7 and 8.5) were used for six uninterrupted hours. The collected samples were submitted to physicochemical analyzes of total organic carbon (TOC) and total nitrogen (NT) via TOC equipment from Shimadzu, model TOC-LCSH, mass spectrometer (EMAR) from Thermo Scientific, model QExactive for Electrospray ionization analysis in positive mode (ESI (+)) and Metrohm ion chromatograph, model 850 with columns for acids and anions. As results obtained, the condition of pH 7 and current density 20 mA.cm-2 provided the removal of 40% of TOC and 29.62% of NT; in the conditions of pH 4 and 8.5 and current density 60 mA.cm-2, removals of 39.31% and 43.73% of TOC and 48.76% and 41.41% of NT were achieved, respectively. This work showed that the ternary anode has good efficiency in macrolide removal and is a good alternative in the treatment of real effluents containing traces of this drug, however, its degradative efficiency may vary according to the pH of the effluent. In addition, this work can overcome the lack of publications of articles focused on the degradation of this macrolide using the anodic oxidation method.

MEMBROS DA BANCA:
Externa à Instituição - ALINE MARIA SALES SOLANO - UFRN
Presidente - 13136 - LEANDRO BEZERRA DE LIMA
Interna - 2470 - SUELY SOUZA LEAL DE CASTRO