Banca de DEFESA: YASMINE ISIS FERNANDES DO NASCIMENTO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : YASMINE ISIS FERNANDES DO NASCIMENTO
DATA : 27/08/2018
HORA: 14:30
LOCAL: Auditório do NUPPRAR/UFRN
TÍTULO:

EFFICIENCY STUDY OF MICROEMULSIONATED SYSTEMS IN THE REMOVAL OF CONTAMINANTS IN PRODUCED WATER

PALAVRAS-CHAVES:

Produced water; contaminants removal; microemulsion systems

PÁGINAS: 122
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

Produced water is a byproduct of oil extraction process and its composition vary according to the well, producing several contaminants that require a very complex treatment process. Thus, this water has been the object of study it can’t be disposed without the proper treatment. This work aimed to evaluate the since and use of microemulsion systems on the removal of produced water contaminants, as well as the application of the sunflower germination. A study of pseudternary diagrams, containing in the waters compositions: produced water enriched with metals (PWD) as aqueous phase (AP), hexane and kerosene as organic phase (OP), ratio co-surfactant/surfactant (C/S = 1 and 4), using six types of surfactants: Renex, Alkonat, coconut oil saponified (SCO), sodium dodecyl sulfate (SDS), cetiltrimethylammonium bromide (CTAB) and ultramina; and as co-surfactant n-butanol. After the diagrams development and choice of the best system, the process of extraction of contaminants that was contained in the PWD, was performed choosing three points located in the Winsor II region, in an area rich in water and contains a low amount of surfactant, the compositions were denominated as maximum point (30% C/S, 10% OP, 60% AP); medium point (17.5% C/S), 7.5% OP, 75% AP); minimum point (5% C/S), 5% OP, 90% AP). For the determination of the contaminants concentration (metals, anions and PAHs) different analysis methods were used, including ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry), HPLC-FLD (High Performance Liquid Chromatography with Fluorescent Detector) and X-Ray Fluorescent. The system that obtained the higher removal efficiency was the one containing SCO as surfactant, C/S ratio = 4 and hexane as oily phase. The best result of contaminants removal was associated with the medium point which composition was (17.5% C/S, 7.5% OP, 75% AP). Finaly, the water with this system was used on sunflower cultivation, getting satisfactory results on the treated diluted compositions. Therefore this study has shown that the use of microemulsion systems may be an alternative for the correct management wastewater generated by the petroleum industry, besides the efficient treatment, this water can be an used as alternative approach for the reuse in the irrigation process.

MEMBROS DA BANCA:
Externo ao Programa - 347289 - AFONSO AVELINO DANTAS NETO
Externo à Instituição - MARIA CARLENISE PAIVA DE ALENCAR MOURA - UFRN
Externo à Instituição - MONICA RODRIGUES DE OLIVEIRA - UFERSA
Externo à Instituição - RICARDO HENRIQUE DE LIMA LEITE - UFERSA
Presidente - 347057 - TEREZA NEUMA DE CASTRO DANTAS