Banca de DEFESA: MARIA LUCIA OLIVEIRA MACHADO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARIA LUCIA OLIVEIRA MACHADO
DATA : 11/09/2019
HORA: 14:00
LOCAL: Auditório, 8º andar, Bloco B, Campus SA da Fundação Universidade Federal do ABC, localizado na Avenida dos Estados, 5001, Santa Terezinha, Santo André, SP
TÍTULO:

Spectrophotometric determination and degradation, by oxidation advanced process, of the 17-α-ethynylestradiol (EE2) .

PÁGINAS: 107
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Analítica
ESPECIALIDADE: Análise de Traços e Química Ambiental
RESUMO:

Emerging pollutants can be eliminated through urine and faeces, both conventional sewage treatment and water treatment from sources for public supply do not completely eliminate them resulting in contamination of water sources and reuse water. Among other considered emerging pollutants to be  hormone 17-α-ethinylestradiol (EE2), used as oral contraceptives. Aiming the determination of hormone in water samples an spectrophotometric method was developed combining with dispersive liquid phase microextraction (DLPME). 200μL of undecanol was used as extraction solvent, with vortex dispersion and 1 minute centrifugation at 4000rpm (RCF = 2630g) obtaining a linear range of 2.5 to 50 mg L^-1, LOD 0.39mg L^-1 and LOQ 1.32 mg L^-1. These conditions were applied to real water samples (reuse, mineral, dam, sea and tap). It was also studied and evaluated the degradation of this pollutant in different water sources using the Advanced Oxidative Process - Fotoeletro-Fenton. After pollutant degradation, organic matter removal was evaluated by Total Organic Carbon (TOC) analysis and using the High Performance Liquid Chromatography (HPLC) technique the intermediate compounds that can be formed during the oxidative process were determined. The process was carried out in a 20mg L^-1 solution with 0.1mol L^-1 K₂SO₄ electrolyte, pH 3,0 in a BDD / EDG cell with Fe²⁺ 0.50 mmol L^-1 at 300mA / cm² at 20ºC and a pressure of O₂ 0, 2bar, where 74.5% of the organic carbon was reduced. This condition was applied to reuse, tap and mineral water samples, removing 88.4, 88.3 and 93.6% organic carbon respectively. For all samples, predominantly residual oxalic acid was detected.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1543683 - IVANISE GAUBEUR
Membro Titular - Examinador(a) Externo ao Programa - 1909336 - ALEXANDRE ZATKOVSKIS CARVALHO
Membro Titular - Examinador(a) Externo à Instituição - MÔNICA HELENA MARCON TEIXEIRA ASSUMPCÃO - UFSCAR
Membro Suplente - Examinador(a) Externo ao Programa - 1548095 - PATRICIA DANTONI
Membro Suplente - Examinador(a) Externo à Instituição - LUCI ROCHA AVEIRO