Banca de DEFESA: VITÓRIA SILVA LOURENÇO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : VITÓRIA SILVA LOURENÇO
DATA : 13/04/2020
HORA: 14:00
LOCAL: Auditório, 8º andar, Bloco B, Campus SA da Fundação Universidade Federal do ABC, localizada na Avenida dos Estados, 5001, Santa Terezinha, Santo André, SP
TÍTULO:

REMOVAL OF PHENOL IN SEA WATER THROUGH PROCESSES OF ADSORPTION AND HETEROGENE PHOTOCATALYSIS USING ACTIVATED COAL MATERIALS MODIFIED WITH TIO2

PÁGINAS: 90
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Tecnologia Química
ESPECIALIDADE: Água
RESUMO:

The oil industry has a role in dumping unknown substances into the water when it comes to oil and gas exploration, more specifically in the improper dumping of water in seawater. This clean water has its phenolic composition, highly toxic compounds. An alternative to remove these contaminants in the water, is to apply photocatalysis or adsorption processes. Therefore, the main objective of the study is to synthesize and characterize activated carbon (CA) catalysts and CA / TiO2 compounds, and to evaluate the ability to remove a model composed of organic contaminant (phenol) in saline by means of photocatalysis processes- heterogeneous and adsorption. Activated carbon (CA) based on glycerol, and the compounds CA and TiO2 (CATi) were synthesized by the gel method using titanium isopropoxide. The materials were tested as photocatalysts in the presence of UV-C (254nm) and visible (390-700nm) radiation and as adsorbents. This work was separated into three parts: the preparation of the materials; characterization by physical-chemical techniques (Boehm titration, N2 adsorption and desorption, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electronic Spectroscopy (SEM) and X-ray Diffraction (XRD)); and tests for phenol removal by adsorption and heterogeneous photocatalysis. In the phenol removal tests, some parameters such as: pH of the initial solution, catalyst dosage and time of exposure to pollution were analyzed. CA-Ti materials obtained a high surface area, reaching 1900 (m2.g-1), while CA-Ti 40% about 928.32 (m2.g-1). By XRD analysis, the use of TiO2 in composites corresponds to the crystalline form of Anatase. In adsorption, the materials have about 40-50% phenol removal with a time of 1 h (equilibrium) with 0.5 g.L-1. For photocatalysis under UV, CA-Ti 20% was more efficient in 4 hours of irradiation, reaching 75% removal; under visible pollution, the materials considered lower, but achieved a higher percentage of removal than commercial TiO2, given the combination of the adsorption and photocatalysis process. According to the results, the coals exhibit promising characteristics for applications in real systems, given the complexity of the use of sea water, especially under visible changes.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 233.691.308-90 - YVAN JESUS OLORTIGA ASENCIOS - UNIFESP
Membro Titular - Examinador(a) Interno ao Programa - 2351974 - JULIANA DOS SANTOS DE SOUZA
Membro Titular - Examinador(a) Externo ao Programa - 2342998 - RODRIGO DE FREITAS BUENO
Membro Suplente - Examinador(a) Interno ao Programa - 1762430 - DALMO MANDELLI
Membro Suplente - Examinador(a) Externo ao Programa - 1814655 - LUCIA HELENA GOMES COELHO