Banca de QUALIFICAÇÃO: CHRYSTIANE DO NASCIMENTO BRITO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : CHRYSTIANE DO NASCIMENTO BRITO
DATA : 09/09/2019
HORA: 09:00
LOCAL: Auditório do NUPPRAR
TÍTULO:

PERFORMANCE EVALUATION OF DONOR BORED DIAMOND ELECTRODE IN THE ELECTROCHEMICAL DEGRADATION OF DIFFERENT TEXTILE DYES: EFFECT OF ELECTROCATALITIC MATERIAL AND REACTORS

PALAVRAS-CHAVES:

electrochemical oxidation, Acid Violet 7, Disperse Yellow 3, electrochemical reactor, synthetic textile effluent.

PÁGINAS: 140
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Analítica
ESPECIALIDADE: Eletroanalítica
RESUMO:

The efficiency of the advanced electrochemical oxidative process (POAE's) in the treatment of synthetic textile effluent was studied through the electrochemical performance of the boron-doped diamond (BDD) electrode Ru0.3Ti0.7O2 and Pt investigating electrochemical oxidation. Acid Violet 7 (AV7) and Disperse Yellow 3 (DY3) dyes. Different experimental variables such as electric current density (15, 30, 40 and 60 mA.cm-2), temperature, pH, support electrolytes (Na2SO4 and NaCl) and different electrochemical reactors with different input-cylindrical reaction cells were also studied. (ES), one in parallel and one perpendicular to the electrodes. To reach the objectives proposed in the thesis, analyzes of pH, color removal, COD, UV-Visible, COT and HPLC were performed. Through these results, it was investigated the degradation capacity of the textile dyes comparing the electrodes, it was observed that the BDD electrode is the most efficient for the treatment, because with the increase of the current density there was mineralization of the organic matter. The mass transfer coefficients (Km), 1.86 × 10−5m. s − 1 and 2.56 × 10−5m.s – 1 were determined for parallel and perpendicular E-S flow reactors, respectively, using the current limitation technique. The degradation results indicated that the highest COD removal efficiency was always achieved in the E-S flow cell in parallel at all current densities. This can be attributed to the possibility of some stagnation in the lateral regions of the electrodes. These favor a longer contact time between the pollutant and the anode. In addition, similar electrical energy consumption per g of COD removal was observed during treatment with both reactors; thus demonstrating the suitability of the parallel flow cell E-S for the efficient and economical treatment of textile effluent.

MEMBROS DA BANCA:
Presidente - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE
Interno - 348475 - DJALMA RIBEIRO DA SILVA
Externo ao Programa - 2524058 - DOUGLAS DO NASCIMENTO SILVA