Estudo da eficiência de sistemas microemulsionados na remoção de contaminantes de água produzida
Produced water is a byproduct of the 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 aime...
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| Format: | doctoralThesis |
| Jezik: | por |
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Brasil
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| Online pristup: | https://repositorio.ufrn.br/jspui/handle/123456789/26411 |
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| Sažetak: | Produced water is a byproduct of the 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. 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). 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. |
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