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Previous issue date: 2014-03-31 / Petr?leo Brasileiro SA - PETROBRAS / This work is directed to the treatment of organic compounds present in produced water
from oil using electrochemical technology. The water produced is a residue of the
petroleum industry are difficult to treat , since this corresponds to 98 % effluent from the
effluent generated in the exploration of oil and contains various compounds such as
volatile hydrocarbons (benzene, toluene, ethylbenzene and xylene), polycyclic aromatic
hydrocarbons (PAHs), phenols, carboxylic acids and inorganic compounds. There are
several types of treatment methodologies that residue being studied, among which are the
biological processes, advanced oxidation processes (AOPs), such as electrochemical
treatments electrooxidation, electrocoagulation, electrocoagulation and eletroredution. The
electrochemical method is a method of little environmental impact because instead of
chemical reagents uses electron through reactions of oxide-reducing transforms toxic
substances into substances with less environmental impact. Thus, this paper aims to study
the electrochemical behavior and elimination of the BTX (benzene, toluene and xylene)
using electrode of Ti/Pt. For the experiment an electrochemical batch system consists of a
continuous source, anode Ti/Pt was used, applying three densities of current (1 mA/cm2,
2,5 mA/cm2 and 5 mA/cm2). The synthetic wastewater was prepared by a solution of
benzene, toluene and xylene with a concentration of 5 ppm, to evaluate the electrochemical
behavior by cyclic voltammetry and polarization curves, even before assessing the removal
of these compounds in solution by electrochemical oxidation. The behavior of each of the
compounds was evaluated by the use of electrochemical techniques indicate that each of
the compounds when evaluated by cyclic voltammetry showed partial oxidation behavior
via adsorption to the surface of the Ti/Pt electrode. The adsorption of each of the present
compounds depends on the solution concentration but there is the strong adsorption of
xylene. However, the removal was confirmed by UV-Vis, and analysis of total organic
carbon (TOC), which showed a percentage of partial oxidation (19,8 % - 99,1 % TOC
removed), confirming the electrochemical behavior already observed in voltammetry and
cyclic polarization curves / O presente trabalho ? dirigido ao tratamento de compostos org?nicos presentes na ?gua
produzida de petr?leo usando a tecnologia eletroqu?mica. A ?gua produzida ? um res?duo
da ind?stria do petr?leo de dif?cil tratamento, j? que este efluente corresponde a 98 % do
efluente gerado na explora??o do petr?leo e cont?m v?rios compostos, tais como
hidrocarbonetos vol?teis (benzeno, tolueno, etilbenzeno e xileno), hidrocarbonetos
polic?clicos arom?ticos (HPAs), fen?is, ?cidos carbox?licos e compostos inorg?nicos.
Existem v?rios tipos de metodologias de tratamento desse res?duo sendo estudadas, dentre
elas est?o os processos biol?gicos, os processos de oxida??o avan?ados (POAS),
tratamentos eletroqu?micos como eletroxida??o, eletrocoagula??o, eletroflota??o e
eletroredu??o. O tratamento eletroqu?mico ? um m?todo ambientalmente correto, pois em
vez de reagentes qu?micos utiliza o el?tron que atrav?s de rea??es de oxido redu??o
transforma as subst?ncias t?xicas em subst?ncias de menor impacto ambiental. Assim, este
trabalho se prop?e a estudar o comportamento eletroqu?mico e a degrada??o dos BTX
(benzeno, tolueno e xileno) usando o eletrodo de Ti/Pt. Para os experimentos foi utilizado
um sistema eletroqu?mico em batelada composto por uma fonte de corrente cont?nua,
?nodo de Ti∕Pt, aplicando tr?s densidades de corrente (1,0 mA/cm2, 2,5 mA/cm2 e 5,0
mA/cm2). O efluente sint?tico foi preparado mediante uma solu??o de benzeno, tolueno e
xileno com concentra??o de 5 ppm, com objetivo de avaliar o comportamento
eletroqu?mico atrav?s de voltametria c?clica e curvas de polariza??o, antes mesmo de
avaliar a remo??o desses compostos em solu??o atrav?s de oxida??o eletroqu?mica. O
comportamento de cada um dos compostos foi avaliado mediante o uso de t?cnicas
eletroqu?micas indicando que cada um dos compostos quando avaliado por voltametria
c?clica, mostrou um comportamento de oxida??o parcial via adsor??o na superf?cie do
eletrodo de Ti/Pt. A adsor??o de cada um dos compostos depende da concentra??o presente
em solu??o, mas destaca-se a forte adsor??o do xileno. Entretanto, a remo??o foi
comprovada atrav?s de espectrofotometria UV-Vis, e analises de carbono org?nico total
(COT), os quais mostraram um percentual de oxida??o parcial (de 19,8 a 99,1% de COT
removido), confirmando o comportamento eletroqu?mico j? observado na voltametria
c?clica e curvas de polariza??o
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17764 |
| Date | 31 March 2014 |
| Creators | Brito, Jonas Araujo de |
| Contributors | CPF:01139059980, http://lattes.cnpq.br/2485073932883264, Silva, Djalma Ribeiro da, CPF:13893734449, http://lattes.cnpq.br/2791074318745945, Fernandes, Nedja Suely, CPF:44420773472, http://lattes.cnpq.br/9563490368583906, Castro, Suely Souza Leal de, CPF:05705753896, http://lattes.cnpq.br/9860381828526444, Huitle, Carlos Alberto Martinez |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Qu?mica, UFRN, BR, F?sico-Qu?mica; Qu?mica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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