Banca de QUALIFICAÇÃO: SEVERINO MOSINHO DE PONTES JÚNIOR

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : SEVERINO MOSINHO DE PONTES JÚNIOR
DATE: 22/05/2025
TIME: 10:00
LOCAL: on line
TITLE:

REMOVAL OF REACTIVE BLUE DYE 222 FROM TEXTILE EFFLUENT BY IONIC FLOCULATION

KEY WORDS:

Ionic Flocculation. Surfactant. Textile Effluent. Reactive Blue 222 Dye. Column Flocculation.

PAGES: 63
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Tratamentos e Aproveitamento de Rejeitos
SUMMARY:

The textile industry handles a vast quantity of inputs and, as a result, produces consumer goods while also generating waste with potentially harmful environmental impacts. Among these, the generation of textile effluents is particularly concerning due to their large volumes and complex physical and chemical characteristics. One possible solution is the use of flocculation, a unit operation widely employed for the treatment of water and various effluents. However, traditional flocculation methods have drawbacks, such as the use of aluminum-based salts and polymers, which often lead to significant sludge generation. This study evaluated the use of calcium and a coconut oil-derived surfactant in the removal of Reactive Blue 222 dye from a synthetic effluent using a column flocculation process. The effect of calcium ion and surfactant concentrations on dye removal efficiency was investigated. The increase in surfactant concentration proved more effective than the increase in calcium ion concentration, achieving removal efficiencies of up to 78% at the highest dye concentration (75 ppm) using 5000 ppm of coconut oil surfactant (OCS), whereas calcium at the same concentration resulted in approximately 55% efficiency. The analysis of calcium in the filtrate showed a residual increase in calcium concentration as the flocculant solution concentration increased, while for solutions with fixed calcium content, the residual remained constant across the three dye concentration ranges. Additionally, micelle size and surface charge were analyzed, revealing increases in both parameters with rising surfactant concentration. FTIR analysis confirmed the presence of dye in the dried solid residue, with stronger signals under higher calcium concentration conditions, especially at the two lowest dye concentrations (25 and 50 ppm).

COMMITTEE MEMBERS:
Presidente - 1308273 - EDUARDO LINS DE BARROS NETO
Externo ao Programa - 1566922 - LINDEMBERG DE JESUS NOGUEIRA DUARTE - UFRNExterna à Instituição - MARIA DE FÁTIMA DANTAS DE MEDEIROS - UFRN
Externo à Instituição - RICARDO PAULO FONSECA MELO - UFERSA