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Previous issue date: 2015-07-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Tecnologias eletroqu?micas t?m sido propostas como uma alternativa promissora para o tratamento de ?guas residuais e solos contaminados. Portanto, este trabalho teve como objetivo estudo de tratamento de solos e efluentes contaminados usando tecnologias eletroqu?micas. Assim, o estudo referente ao aumento de escala do sistema eletroqu?mico de fluxo cont?nuo para o tratamento de ?gua residuais da ind?stria petroqu?mica foi investigado usando eletrodos de platina suportada em tit?nio (Ti/Pt) e Diamante Dopado com Boro (DDB). Os resultados mostraram claramente que sob as condi??es operacionais estudadas e os materiais eletrocatal?ticos empregados, a melhor efici?ncia de remo??o foi atingida com o eletrodo de BDD reduzindo a demanda qu?mica de oxig?nio (DQO) de 2746 mg L?1 para 200 mg L?1 em 5 h, consumindo 56.2 kWh m?3. A descontamina??o de solos e efluentes por derivados de petr?leo foi avaliada, mediante o estudo dos efeitos da remedia??o eletrocin?tica para remo??o de hidrocarbonetos totais de petr?leo (HTP) de solos contaminados com diesel. A efici?ncia deste processo foi dependente dos eletr?litos usados Na2SO4 (96,46%), ?cido c?trico (81,36 %) e NaOH (68,03%) durante 15 dias. Al?m disso, o efluente gerado ap?s o tratamento do solo foi tratado mediante oxida??o eletroqu?mica, atingindo uma boa elimina??o da carga org?nica de poluentes dissolvidos. Em fun??o do comportamento f?sico dos efluentes contaminados com petr?leo (estado emulsionado); efluentes emulsionados com atrazina foram investigados. As principais caracter?sticas dos efluentes produzidos durante a lavagem de solos contaminados foram estudadas, sendo dependentes da dosagem de surfactante usado; o que determinava seu tratamento eletrol?tico com BDD. A oxida??o eletroqu?mica do efluente emulsionado com atrazina mostrou-se foi eficiente, mas a chave do tratamento ? a redu??o do tamanho das micelas. / Electrochemical technologies have been proposed as a promising alternative for
the treatment of effluents and contaminated soils. Therefore, the objective of this work
was to study the treatment of contaminated soils and wastewaters using electrochemical
technologies. Thus, the study regarding the scale-up of the electrochemical system with
continuous flow treatment of wastewater of the petrochemical industry was investigated
using platinum electrodes supported on titanium (Ti / Pt), and boron-doped diamond
(BDD). The results clearly showed that under the operating conditions studied and
electrocatalytic materials employed, the better removal efficiency was achieved with
BDD electrode reducing the chemical oxygen demand (COD) from 2746 mg L-1
to 200
mg L-1
in 5 h consuming 56.2 kWh m-3
. The decontamination of soils and effluents by
petrochemical products was evaluated by studying the effects of electrokinetic
remediation for removal of total petroleum hydrocarbons (HTP) from contaminated soil
with diesel. The efficiency of this process was dependent on the electrolyte used
Na2SO4 (96.46%), citric acid (81.36%) and NaOH (68.03%) for 15 days. Furthermore,
the effluent after treatment of the soil was treated by electrochemical oxidation,
achieving a good elimination of the organic polluting load dissolved. Depending on the
physical behavior of wastewater contaminated with oil (emulsified state); atrazine
emulsified effluents were investigated. The main characteristics of the effluent produced
during the washing of contaminated soil were studied, being dependent on the surfactant
dosage used; which determined its electrolytic treatment with BDD. The
electrochemical oxidation of emulsified effluent of atrazine was efficient, but the key to
the treatment is reducing the size of micelles.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20379 |
| Date | 24 July 2015 |
| Creators | Santos, Elisama Vieira dos |
| Contributors | 01139059980, Silva, Djalma Ribeiro da, 13893734449, Ara?jo, Eliane Gon?alves de, 03363541422, Tonholo, Josealdo, 16392398805, Rodrigo, Manuel Andr?s Rodrigo, 00000000000, Huitle, Carlos Alberto Martinez |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| 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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