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Previous issue date: 2011-01-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / In this work, the treatment of synthetic wastewaters containing Remazol Red BR
(RRB) and Novacron Blue C-D (NB) by anodic oxidation using boron doped diamond anodes
(BDD) and Novacron Yellow (YN) using BDD and Platinum (Pt) anodes was investigated.
Galvanostatic electrolyses of RRB and NB synthetic wastewaters have led to the complete
decolorization removal at different operating conditions (current density, pH and
temperature). The influence of these parameters was investigated in order to find the best
conditions for dyestuff colour removal. According to the experimental results obtained, the
electrochemical oxidation process is suitable for decolorizing wastewaters containing these
textile dyes, due to the electrocatalytic properties of BDD and Pt anode. Energy requirements
for removing colour during galvanostatic electrolyses of RRB, NB and YN synthetic solutions
depends mainly on the operating conditions; for example for RRB, it passes from 3.30 kWh
m-3 at 20 mA cm-2 to 4.28 kWh m-3 at 60 mA cm-2 (pH = 1); 15.23 kWh m-3 at 20 mA cm-2 to
24.75 kWh m-3 at 60 mA cm-2 (pH = 4.5); 10.80 kWh m-3 at 20 mA cm-2 to 31.5 kWh m-3 at
60 mA cm-2 (pH = 8) (data estimated per volume of treated effluent). In order to verify the
Brazilian law regulations of NB and RRB synthetic solutions after electrochemical
decolourisation treatment, Hazen Units values were determined and the total colour removal
was achieved; remaining into the regulations. Finally, electrical energy cost for removing
colour was estimated / Neste trabalho, o tratamento de efluentes sint?ticos, contendo Vermelho de Remazol
BR (RRB) e Azul de Novacron CD (NB) por oxida??o an?dica com ?nodos de Diamante
Dopado com Boro (BDD) e Amarelo de Novacron (YN) com ?nodo de Platina (Pt) e DDB
foram investigados. A eletr?lise galvanost?tica dos efluentes sint?ticos RRB, NB e YN t?m
levado ? remo??o completa da cor em diferentes condi??es operacionais (densidade de
corrente, pH e temperatura). A influ?ncia destes par?metros foi investigada a fim de encontrar
as melhores condi??es para a remo??o da cor do corante. De acordo com os resultados
experimentais obtidos, o processo de oxida??o eletroqu?mica ? adequado para descolora??o de
?guas residuais contendo esses corantes t?xteis, devido ?s propriedades eletrocatal?ticas dos
?nodos DDB e Pt. Exig?ncias de energia para a remo??o de cor durante eletr?lises
galvanost?ticas das solu??es sint?ticas de RRB, NB e YN depende principalmente das
condi??es de funcionamento, por exemplo, RRB, passa de 3,30 kWh m-3 em 20 mA cm-2 para
4,28 kWh m-3 em 60 mA cm -2 (pH = 1); 15,23 kWh m-3 em 20 mA cm-2 para 24,75 kWh m-3
em 60 mA cm-2 (pH = 4,5); 10,80 kWh m-3 em 20 mA cm-2 para 31,5 kWh m-3 em 60 mA cm-
2 (pH = 8) (dados estimados por volume de efluente tratado). A fim de verificar a
regulamenta??o da lei brasileira dos efluentes sint?ticos ap?s descolora??o pelo tratamento
eletroqu?mico, determinou-se os valores de Unidades Hazen e a remo??o total da cor foi
alcan?ada, permanecendo na regulamenta??o. Finalmente, o custo de energia el?trica para
remo??o da cor foi estimado
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17639 |
| Date | 27 January 2011 |
| Creators | Rocha, J?ssica Horacina Bezerra |
| Contributors | CPF:01139059980, http://lattes.cnpq.br/2485073932883264, Ara?jo, Ant?nio Souza de, CPF:35530502415, http://lattes.cnpq.br/9770622597949866, Silva, Djalma Ribeiro da, CPF:13893734449, http://lattes.cnpq.br/2791074318745945, Oliveira, Jo?o Bosco Lucena de, CPF:19127537404, http://lattes.cnpq.br/1360004695124740, Barbosa, Andr?a Francisca Fernandes, CPF:01894743431, Fernandes, Nedja Suely, 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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