Aplicação de um reator eletroquímico em fluxo através de um ânodo de Ti/RuO2 na degradação de compostos orgânicos presentes em um efluente sintético contaminado por derivado de petróleo
Contamination by organic oil derivatives has become increasingly common in nature and treatment methods are periodically sought to remedy this type of contamination. Electrochemical reactors are being studied in order to optimize the various types of electrochemical treatments. Through the study...
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| Formato: | doctoralThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/32251 |
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| Resumo: | Contamination by organic oil derivatives has become increasingly common in nature and
treatment methods are periodically sought to remedy this type of contamination.
Electrochemical reactors are being studied in order to optimize the various types of
electrochemical treatments. Through the study of the reactor hydrodynamics, it was possible to
observe a predominantly turbulent flow regime with an experimental mass transport constant
higher than the theoretical one, indicating that the mass transfer is not homogeneous due to the
presence of gases generated in the electrodes. Electro-oxidation using DSA (Ti/RuO2)
electrodes, due to their low cost, greater durability and relative efficiency, has been studied in
the removal of organic substances derived from petroleum. The complete factorial design was
employed as a statistical technique in order to evaluate the best conditions for the development
of the synthetic effluent, analyzing the miscibility of diesel in a saline matrix, as well as to
verify the best conditions employed in the electrochemical reactor on the main factors worked
and its effects on the electro-oxidation of this saline matrix contaminated with diesel. From the
prepared synthetic effluent, it was possible to apply electro-oxidation as a treatment technique
in a tank-type bench reactor in direct flow through a Ti/RuO2 anode and a titanium cathode,
both mesh type, arranged parallel to each other and perpendicular to the reactor. Through the
TOC analysis, Test 6 with a current density of 50 mA/cm2
, initial pH 3 and NaCl concentration
of 70 mM, showed the best result, with 63% mineralization, as it could also be followed through
the spectra of fluorescence and UV absorption, indicating the reduction of the bands
corresponding to the organic compounds present. The UV-Vis spectrum also showed the
presence of active chlorine substances, electrochemically generated compounds during the
electrochemical process using this type of anode. |
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