New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jece.2017.08.041 http://hdl.handle.net/11449/175101 |
Resumo: | The flow-by electrochemical reactor is generally used in batch mode with extended process time in order to achieve high efficiency in the removal of organic contaminant from aqueous solution. Moreover, the batch mode system is inappropriate for the treatment of wastewater in high volume or as a continuous stream. This paper presents a new operational mode for the electrochemical reactor in which the electrolyte passes over the electrodes just once at a reduced flow rate and with high hydraulic retention time. The concentration of hydrogen peroxide generated in the reactor running in the single-pass flow mode attained 10.2 mg L-1 cm-2 in acid medium, a value similar to that obtained previously with the same type of reactor operating in batch mode. In the single-pass mode, the electrochemical reactor showed high rates of removal of the antibiotic levofloxacin (initial 50 mg L-1) and organic load (initial 130 mg L-1) up to 99 and 86%, respectively, when operated under electro- or photo-Fenton degradation conditions (acid medium with Fe2+ ions; absence or presence of UV irradiation). Degradation of levofloxacin generated high levels of nitrate (up to 4.5 mg L-1) and various by-products that could be identified by liquid chromatography-mass spectrometry. |
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New operational mode of an electrochemical reactor and its application to the degradation of levofloxacinFenton reactionGas diffusion electrodeLevofloxacin degradationSingle-pass flow electrochemical reactorThe flow-by electrochemical reactor is generally used in batch mode with extended process time in order to achieve high efficiency in the removal of organic contaminant from aqueous solution. Moreover, the batch mode system is inappropriate for the treatment of wastewater in high volume or as a continuous stream. This paper presents a new operational mode for the electrochemical reactor in which the electrolyte passes over the electrodes just once at a reduced flow rate and with high hydraulic retention time. The concentration of hydrogen peroxide generated in the reactor running in the single-pass flow mode attained 10.2 mg L-1 cm-2 in acid medium, a value similar to that obtained previously with the same type of reactor operating in batch mode. In the single-pass mode, the electrochemical reactor showed high rates of removal of the antibiotic levofloxacin (initial 50 mg L-1) and organic load (initial 130 mg L-1) up to 99 and 86%, respectively, when operated under electro- or photo-Fenton degradation conditions (acid medium with Fe2+ ions; absence or presence of UV irradiation). Degradation of levofloxacin generated high levels of nitrate (up to 4.5 mg L-1) and various by-products that could be identified by liquid chromatography-mass spectrometry.Escola de Engenharia de Lorena Universidade de São Paulo, Estrada Municipal do Campinho snInstituto de Química de São Carlos Universidade de São Paulo, Av. Trabalhador São-carlense 400Escola de Engenharia de São Carlos Universidade de São Paulo, Av. Trabalhador São-carlense 400Inst. Nac. de Tecnologias Alternativas para Deteccao Avaliacao Toxicologica e Remocao de Micropoluentes e Radioativos Instituto de Química Unesp, Caixa Postal 355Inst. Nac. de Tecnologias Alternativas para Deteccao Avaliacao Toxicologica e Remocao de Micropoluentes e Radioativos Instituto de Química Unesp, Caixa Postal 355Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Rocha, Robson S.Valim, Ricardo B.Trevelin, Leandro C.Silva, Fernando L.Steter, Juliana R.Zaiat, MarceloLanza, Marcos R.V. [UNESP]2018-12-11T17:14:23Z2018-12-11T17:14:23Z2017-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article4441-4446application/pdfhttp://dx.doi.org/10.1016/j.jece.2017.08.041Journal of Environmental Chemical Engineering, v. 5, n. 5, p. 4441-4446, 2017.2213-3437http://hdl.handle.net/11449/17510110.1016/j.jece.2017.08.0412-s2.0-850284608752-s2.0-85028460875.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Environmental Chemical Engineering0,924info:eu-repo/semantics/openAccess2023-10-31T06:07:49Zoai:repositorio.unesp.br:11449/175101Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:30:47.621797Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin |
title |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin |
spellingShingle |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin Rocha, Robson S. Fenton reaction Gas diffusion electrode Levofloxacin degradation Single-pass flow electrochemical reactor |
title_short |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin |
title_full |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin |
title_fullStr |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin |
title_full_unstemmed |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin |
title_sort |
New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin |
author |
Rocha, Robson S. |
author_facet |
Rocha, Robson S. Valim, Ricardo B. Trevelin, Leandro C. Silva, Fernando L. Steter, Juliana R. Zaiat, Marcelo Lanza, Marcos R.V. [UNESP] |
author_role |
author |
author2 |
Valim, Ricardo B. Trevelin, Leandro C. Silva, Fernando L. Steter, Juliana R. Zaiat, Marcelo Lanza, Marcos R.V. [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Rocha, Robson S. Valim, Ricardo B. Trevelin, Leandro C. Silva, Fernando L. Steter, Juliana R. Zaiat, Marcelo Lanza, Marcos R.V. [UNESP] |
dc.subject.por.fl_str_mv |
Fenton reaction Gas diffusion electrode Levofloxacin degradation Single-pass flow electrochemical reactor |
topic |
Fenton reaction Gas diffusion electrode Levofloxacin degradation Single-pass flow electrochemical reactor |
description |
The flow-by electrochemical reactor is generally used in batch mode with extended process time in order to achieve high efficiency in the removal of organic contaminant from aqueous solution. Moreover, the batch mode system is inappropriate for the treatment of wastewater in high volume or as a continuous stream. This paper presents a new operational mode for the electrochemical reactor in which the electrolyte passes over the electrodes just once at a reduced flow rate and with high hydraulic retention time. The concentration of hydrogen peroxide generated in the reactor running in the single-pass flow mode attained 10.2 mg L-1 cm-2 in acid medium, a value similar to that obtained previously with the same type of reactor operating in batch mode. In the single-pass mode, the electrochemical reactor showed high rates of removal of the antibiotic levofloxacin (initial 50 mg L-1) and organic load (initial 130 mg L-1) up to 99 and 86%, respectively, when operated under electro- or photo-Fenton degradation conditions (acid medium with Fe2+ ions; absence or presence of UV irradiation). Degradation of levofloxacin generated high levels of nitrate (up to 4.5 mg L-1) and various by-products that could be identified by liquid chromatography-mass spectrometry. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-10-01 2018-12-11T17:14:23Z 2018-12-11T17:14:23Z |
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/10.1016/j.jece.2017.08.041 Journal of Environmental Chemical Engineering, v. 5, n. 5, p. 4441-4446, 2017. 2213-3437 http://hdl.handle.net/11449/175101 10.1016/j.jece.2017.08.041 2-s2.0-85028460875 2-s2.0-85028460875.pdf |
url |
http://dx.doi.org/10.1016/j.jece.2017.08.041 http://hdl.handle.net/11449/175101 |
identifier_str_mv |
Journal of Environmental Chemical Engineering, v. 5, n. 5, p. 4441-4446, 2017. 2213-3437 10.1016/j.jece.2017.08.041 2-s2.0-85028460875 2-s2.0-85028460875.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Environmental Chemical Engineering 0,924 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
4441-4446 application/pdf |
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_ |
1808128664705957888 |