Banca de QUALIFICAÇÃO: MAURICIO MARUO KATO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MAURICIO MARUO KATO
DATA : 16/03/2020
HORA: 14:00
LOCAL: Sala 301 - 3o andar - Bloco B - Santo André
TÍTULO:

SELECTIVE SEPARATION OF TITANIUM DIOXIDE FROM PAINTING INDUSTRY WATE

PÁGINAS: 60
GRANDE ÁREA: Outra
ÁREA: Multidisciplinar
RESUMO:

Among the largest waste generating industries, the paint-making chemical industries play a prominent role, their large volumes are responsible for a high generation of complex hazardous waste containing various raw materials such as TiO2, CaCO3, SiO2, surfactants, dispersants and polymers. The TiO2 contained in these wastes from the manufacture of water-based paints has high financial and environmental value due to the procurement and transportation processes involved. The objective of this project was to develop a process for selective separation of TiO2 pigment from paint industry effluents. The methodology was separated into four phases, and the first phase consisted of the creation of a statistical profile of the composition and physicochemical properties of the industrial effluent through pH and conductivity analyzes, determination of solids content and ray fluorescence. x-ray by dispersive energy (FRX) for qualification and quantification of inorganic fraction (TiO2, CaCO3 and other components), thermogravimetric analysis (TGA) for determination of organic fractions and nuclear magnetic resonance (NMR) to identify these structures (polymers and surfactants from paints). The second phase was based on the use of surface response methodology to evaluate the factors acting on the selectivity of the flocculation process, and flotation assays using cationic and anionic surfactants in order to understand the differences caused by the change in surface-particle interaction in the flocculation process. system. Statistical analysis of the factors in the flocculation process showed that under optimized conditions, 98.1% TiO2 flocculation is possible while the other solids have an average flocculation of 71.5%, indicating selectivity for TiO2 flocculation. The flotation assays were evaluated by scanning electron microscopy with dispersive energy x-ray fluorescence (MED-EDS), showing that the flotation process without the addition of surfactants presents the highest selectivity, showing that in the flotation process, the morphological structure and particle size are important factors. The third phase will be based on the optimization of the separation method, after the evaluation of the results regarding the selectivity and recovery levels and the final phase will be the evaluation of the efficiency of a single method of separation of titanium dioxide in the paint industry effluent.

MEMBROS DA BANCA:
Membro Titular - Examinador(a) Interno ao Programa - 1671688 - ANDRE SARTO POLO
Membro Titular - Examinador(a) Externo ao Programa - 1814655 - LUCIA HELENA GOMES COELHO
Presidente - Externo ao Programa - 1760410 - JEVERSON TEODORO ARANTES JUNIOR
Membro Suplente - Examinador(a) Interno ao Programa - 1544341 - WENDEL ANDRADE ALVES
Membro Suplente - Examinador(a) Interno ao Programa - 1763443 - MARCIA APARECIDA DA SILVA SPINACE
Membro Suplente - Examinador(a) Externo ao Programa - 2342998 - RODRIGO DE FREITAS BUENO