Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s10800-018-1257-4 http://hdl.handle.net/11449/187010 |
Resumo: | Abstract: The electrochemical oxidation of synthetic textile effluent containing Azo-dye Acid Violet 7 (200 mg L−1) was investigated using planar disk electrodes placed in a one inlet–outlet (I–O) cylindrical reaction chamber. Two different I–O configurations were studied, one parallel and the other perpendicular to the electrodes. Both reactors were equipped with boron-doped diamond (BDD) anodes and titanium cathodes. The effect of cell design on the hydrodynamic characteristics and efficiency of the reactors in terms of colour and chemical oxygen demand (COD) removal was studied. Mass transfer coefficient (Km) values of 1.86 × 10−5 m s−1 and 2.56 × 10−5 m s−1 were obtained for the parallel and perpendicular I–O flow reactors, respectively, using the limiting current technique. The degradation results indicated that the colour elimination was quite efficient regardless of the type of reactor used and that complete colour removal could be reached in less than 80 min at applied current density of 30 mA cm−2 and above. However, higher COD removal efficiency was always achieved in the parallel I–O flow cell compared to perpendicular I–O flow reactor at all of the current densities studied, which can be attributed to the possibility of some stagnation in the lateral regions of the electrodes. These favour a longer contact time between the pollutants and the anode, also favouring its removal. Besides, similar electric energy consumption per g COD removal was observed during the treatment with either reactors; thus demonstrating the suitability of the parallel I–O flow cell for the efficient and economic treatment of textile effluent. Graphical abstract: [Figure not available: see fulltext.]. |
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Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiencyAcid Violet 7Chemical oxygen demandColour eliminationElectrochemical oxidationMass transfer coefficientAbstract: The electrochemical oxidation of synthetic textile effluent containing Azo-dye Acid Violet 7 (200 mg L−1) was investigated using planar disk electrodes placed in a one inlet–outlet (I–O) cylindrical reaction chamber. Two different I–O configurations were studied, one parallel and the other perpendicular to the electrodes. Both reactors were equipped with boron-doped diamond (BDD) anodes and titanium cathodes. The effect of cell design on the hydrodynamic characteristics and efficiency of the reactors in terms of colour and chemical oxygen demand (COD) removal was studied. Mass transfer coefficient (Km) values of 1.86 × 10−5 m s−1 and 2.56 × 10−5 m s−1 were obtained for the parallel and perpendicular I–O flow reactors, respectively, using the limiting current technique. The degradation results indicated that the colour elimination was quite efficient regardless of the type of reactor used and that complete colour removal could be reached in less than 80 min at applied current density of 30 mA cm−2 and above. However, higher COD removal efficiency was always achieved in the parallel I–O flow cell compared to perpendicular I–O flow reactor at all of the current densities studied, which can be attributed to the possibility of some stagnation in the lateral regions of the electrodes. These favour a longer contact time between the pollutants and the anode, also favouring its removal. Besides, similar electric energy consumption per g COD removal was observed during the treatment with either reactors; thus demonstrating the suitability of the parallel I–O flow cell for the efficient and economic treatment of textile effluent. Graphical abstract: [Figure not available: see fulltext.].Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Laboratório de Eletroquímica Ambiental e Aplicada Instituto de Química Universidade Federal do Rio Grande do NorteLaboratório de Desenvolvimento de Processos Químicos Instituto de Química Universidade de Brasília, Campus Universitário Darcy Ribeiro CP 4478National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry Unesp, P.O. Box 355National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry Unesp, P.O. Box 355FAPESP: 2014/50945-4CNPq: CNPq - 401519/2014-7CNPq: CNPq - 446846/2014-7CNPq: CNPq - 465571/2014-0Universidade Federal do Rio Grande do NorteUniversidade de Brasília (UnB)Universidade Estadual Paulista (Unesp)Brito, Chrystiane N.Ferreira, Maiara Barbosade Moura Santos, Elaine Cristina M.Léon, José J. LínaresGaniyu, Soliu O.Martínez-Huitle, Carlos A. [UNESP]2019-10-06T15:22:44Z2019-10-06T15:22:44Z2018-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1321-1330http://dx.doi.org/10.1007/s10800-018-1257-4Journal of Applied Electrochemistry, v. 48, n. 12, p. 1321-1330, 2018.1572-88380021-891Xhttp://hdl.handle.net/11449/18701010.1007/s10800-018-1257-42-s2.0-85055675774Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Electrochemistryinfo:eu-repo/semantics/openAccess2021-10-23T02:05:42Zoai:repositorio.unesp.br:11449/187010Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:30:31.275229Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency |
title |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency |
spellingShingle |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency Brito, Chrystiane N. Acid Violet 7 Chemical oxygen demand Colour elimination Electrochemical oxidation Mass transfer coefficient |
title_short |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency |
title_full |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency |
title_fullStr |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency |
title_full_unstemmed |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency |
title_sort |
Electrochemical degradation of Azo-dye Acid Violet 7 using BDD anode: effect of flow reactor configuration on cell hydrodynamics and dye removal efficiency |
author |
Brito, Chrystiane N. |
author_facet |
Brito, Chrystiane N. Ferreira, Maiara Barbosa de Moura Santos, Elaine Cristina M. Léon, José J. Línares Ganiyu, Soliu O. Martínez-Huitle, Carlos A. [UNESP] |
author_role |
author |
author2 |
Ferreira, Maiara Barbosa de Moura Santos, Elaine Cristina M. Léon, José J. Línares Ganiyu, Soliu O. Martínez-Huitle, Carlos A. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Rio Grande do Norte Universidade de Brasília (UnB) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Brito, Chrystiane N. Ferreira, Maiara Barbosa de Moura Santos, Elaine Cristina M. Léon, José J. Línares Ganiyu, Soliu O. Martínez-Huitle, Carlos A. [UNESP] |
dc.subject.por.fl_str_mv |
Acid Violet 7 Chemical oxygen demand Colour elimination Electrochemical oxidation Mass transfer coefficient |
topic |
Acid Violet 7 Chemical oxygen demand Colour elimination Electrochemical oxidation Mass transfer coefficient |
description |
Abstract: The electrochemical oxidation of synthetic textile effluent containing Azo-dye Acid Violet 7 (200 mg L−1) was investigated using planar disk electrodes placed in a one inlet–outlet (I–O) cylindrical reaction chamber. Two different I–O configurations were studied, one parallel and the other perpendicular to the electrodes. Both reactors were equipped with boron-doped diamond (BDD) anodes and titanium cathodes. The effect of cell design on the hydrodynamic characteristics and efficiency of the reactors in terms of colour and chemical oxygen demand (COD) removal was studied. Mass transfer coefficient (Km) values of 1.86 × 10−5 m s−1 and 2.56 × 10−5 m s−1 were obtained for the parallel and perpendicular I–O flow reactors, respectively, using the limiting current technique. The degradation results indicated that the colour elimination was quite efficient regardless of the type of reactor used and that complete colour removal could be reached in less than 80 min at applied current density of 30 mA cm−2 and above. However, higher COD removal efficiency was always achieved in the parallel I–O flow cell compared to perpendicular I–O flow reactor at all of the current densities studied, which can be attributed to the possibility of some stagnation in the lateral regions of the electrodes. These favour a longer contact time between the pollutants and the anode, also favouring its removal. Besides, similar electric energy consumption per g COD removal was observed during the treatment with either reactors; thus demonstrating the suitability of the parallel I–O flow cell for the efficient and economic treatment of textile effluent. Graphical abstract: [Figure not available: see fulltext.]. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-01 2019-10-06T15:22:44Z 2019-10-06T15:22:44Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s10800-018-1257-4 Journal of Applied Electrochemistry, v. 48, n. 12, p. 1321-1330, 2018. 1572-8838 0021-891X http://hdl.handle.net/11449/187010 10.1007/s10800-018-1257-4 2-s2.0-85055675774 |
url |
http://dx.doi.org/10.1007/s10800-018-1257-4 http://hdl.handle.net/11449/187010 |
identifier_str_mv |
Journal of Applied Electrochemistry, v. 48, n. 12, p. 1321-1330, 2018. 1572-8838 0021-891X 10.1007/s10800-018-1257-4 2-s2.0-85055675774 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Applied Electrochemistry |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1321-1330 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129212077309952 |