Título: | ELETROCOAGULATION APPLIED TO TREAT SOLUTIONS WITH HIGH CONCENTRATION OF OIL | |||||||
Autor: |
ANTONIO GUTIERREZ MERMA |
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Colaborador(es): |
MAURICIO LEONARDO TOREM - Orientador |
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Catalogação: | 19/SET/2008 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | |||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=12209&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=12209&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.12209 | |||||||
Resumo: | ||||||||
The separation of emulsions or colloidal particles from
wastewater is a major concern for the petroleum, metal
manufacturing, food, textile, paper and hydrometallurgy
industries. The emulsion present is very stable due to the
presence of surfactants, so conventional methods can not be
applied and it is necessary to combine one or two treatment
processes for highly effective purification. Several
techniques have been applied to treat these types of oily
wastewater, e.g.: chemical, biological and electrochemical
destabilization, ultrafiltration. Electrocoagulation is
initiated by the oxidation of sacrificial anodes. The metal
ions released combine to the hydroxyl ions produced at the
cathode to form the corresponding metal hydroxides and
others species, which cause the destabilization of the
contaminants or particulate suspensions and form
flocs. The bubbles hydrogen gas capturing and floating the
flocs formed and separating from the liquid surface by
scraping or settling depending on density of
the flocs. In this work, the electrocoagulation technique
was studied in order to treat concentrated oil-water
emulsions chemically stabilized. This study was
mainly focused on the effects of operating parameters such
as: initial pH, current density, reaction time, NaCl
concentration, electrode distance and inlet
concentration on the abatement rate of chemical oxygen
demand (COD). The synthetic emulsion was prepared from Shell
- Talpa 30 oil (3g.L-1) and sodium dodecyl sulfate (1.0
g.L-1), also was added NaCl (3g L-1) for increasing the
conductivity of the emulsion. Under those conditions we had
a pH value around 8.70 and a zeta potential around -70mV,
showing a good stability of the emulsion.
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