Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection
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.jenvman.2017.09.006 http://hdl.handle.net/11449/175140 |
Resumo: | Electrochemically assisted photocatalysis (by electronic drainage) is a highly promising method for disinfection of water. In this research, the efficiency of photolytic oxidation using UV-A radiation and electrochemically assisted photocatalysis (with electric potential of 1.5 V) was studied by using electrodes prepared by thermal treatment and doped with silver, for inactivation of Escherichia coli and Staphylococcus aureus. The Chick-Watson microorganism inactivation model was applied and the electrical energy consumption of the process was calculated. It was observed no significant inactivation of microorganisms when UV-A light or electric potential were applied separately. However, the electrochemically assisted photocatalytic process, with Ag-doped electrode completely inactivated the microbial population after 10 (E. coli) and 60 min (S. aureus). The best performing non-doped electrodes achieved 52.74% (E. coli) and 44.09% (S. aureus) inactivation rates after 60 min. Thus, electrochemically assisted photocatalytic activity was not only effective for the inactivation of microorganisms, but also notably low on electrical energy consumption during the treatment due to small current and low electric potential applied. |
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Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfectionAg-doped electrodesBacterial inactivationElectron drainageKinetics studyThermal oxidesElectrochemically assisted photocatalysis (by electronic drainage) is a highly promising method for disinfection of water. In this research, the efficiency of photolytic oxidation using UV-A radiation and electrochemically assisted photocatalysis (with electric potential of 1.5 V) was studied by using electrodes prepared by thermal treatment and doped with silver, for inactivation of Escherichia coli and Staphylococcus aureus. The Chick-Watson microorganism inactivation model was applied and the electrical energy consumption of the process was calculated. It was observed no significant inactivation of microorganisms when UV-A light or electric potential were applied separately. However, the electrochemically assisted photocatalytic process, with Ag-doped electrode completely inactivated the microbial population after 10 (E. coli) and 60 min (S. aureus). The best performing non-doped electrodes achieved 52.74% (E. coli) and 44.09% (S. aureus) inactivation rates after 60 min. Thus, electrochemically assisted photocatalytic activity was not only effective for the inactivation of microorganisms, but also notably low on electrical energy consumption during the treatment due to small current and low electric potential applied.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)São Paulo State University (UNESP) Institute of Biosciences Department of Biochemistry and Microbiology, Av. 24 A, 1515, Bela VistaSão Paulo State University (UNESP) Institute of Biosciences Department of Biochemistry and Microbiology, Av. 24 A, 1515, Bela VistaUniversidade Estadual Paulista (Unesp)dos Santos, Andreia Betina Kreuser [UNESP]Claro, Elis Marina Turini [UNESP]Montagnolli, Renato Nallin [UNESP]Cruz, Jaqueline Matos [UNESP]Lopes, Paulo Renato Matos [UNESP]Bidoia, Ederio Dino [UNESP]2018-12-11T17:14:32Z2018-12-11T17:14:32Z2017-12-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article255-263application/pdfhttp://dx.doi.org/10.1016/j.jenvman.2017.09.006Journal of Environmental Management, v. 204, p. 255-263.1095-86300301-4797http://hdl.handle.net/11449/17514010.1016/j.jenvman.2017.09.0062-s2.0-850289354442-s2.0-85028935444.pdf922034858356004308544031487097750000-0001-7040-19830000-0003-4886-5292Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Environmental Management1,1611,161info:eu-repo/semantics/openAccess2023-11-20T06:17:05Zoai:repositorio.unesp.br:11449/175140Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:16:10.648271Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection |
title |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection |
spellingShingle |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection dos Santos, Andreia Betina Kreuser [UNESP] Ag-doped electrodes Bacterial inactivation Electron drainage Kinetics study Thermal oxides |
title_short |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection |
title_full |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection |
title_fullStr |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection |
title_full_unstemmed |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection |
title_sort |
Electrochemically assisted photocatalysis: Highly efficient treatment using thermal titanium oxides doped and non-doped electrodes for water disinfection |
author |
dos Santos, Andreia Betina Kreuser [UNESP] |
author_facet |
dos Santos, Andreia Betina Kreuser [UNESP] Claro, Elis Marina Turini [UNESP] Montagnolli, Renato Nallin [UNESP] Cruz, Jaqueline Matos [UNESP] Lopes, Paulo Renato Matos [UNESP] Bidoia, Ederio Dino [UNESP] |
author_role |
author |
author2 |
Claro, Elis Marina Turini [UNESP] Montagnolli, Renato Nallin [UNESP] Cruz, Jaqueline Matos [UNESP] Lopes, Paulo Renato Matos [UNESP] Bidoia, Ederio Dino [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
dos Santos, Andreia Betina Kreuser [UNESP] Claro, Elis Marina Turini [UNESP] Montagnolli, Renato Nallin [UNESP] Cruz, Jaqueline Matos [UNESP] Lopes, Paulo Renato Matos [UNESP] Bidoia, Ederio Dino [UNESP] |
dc.subject.por.fl_str_mv |
Ag-doped electrodes Bacterial inactivation Electron drainage Kinetics study Thermal oxides |
topic |
Ag-doped electrodes Bacterial inactivation Electron drainage Kinetics study Thermal oxides |
description |
Electrochemically assisted photocatalysis (by electronic drainage) is a highly promising method for disinfection of water. In this research, the efficiency of photolytic oxidation using UV-A radiation and electrochemically assisted photocatalysis (with electric potential of 1.5 V) was studied by using electrodes prepared by thermal treatment and doped with silver, for inactivation of Escherichia coli and Staphylococcus aureus. The Chick-Watson microorganism inactivation model was applied and the electrical energy consumption of the process was calculated. It was observed no significant inactivation of microorganisms when UV-A light or electric potential were applied separately. However, the electrochemically assisted photocatalytic process, with Ag-doped electrode completely inactivated the microbial population after 10 (E. coli) and 60 min (S. aureus). The best performing non-doped electrodes achieved 52.74% (E. coli) and 44.09% (S. aureus) inactivation rates after 60 min. Thus, electrochemically assisted photocatalytic activity was not only effective for the inactivation of microorganisms, but also notably low on electrical energy consumption during the treatment due to small current and low electric potential applied. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12-15 2018-12-11T17:14:32Z 2018-12-11T17:14:32Z |
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.jenvman.2017.09.006 Journal of Environmental Management, v. 204, p. 255-263. 1095-8630 0301-4797 http://hdl.handle.net/11449/175140 10.1016/j.jenvman.2017.09.006 2-s2.0-85028935444 2-s2.0-85028935444.pdf 9220348583560043 0854403148709775 0000-0001-7040-1983 0000-0003-4886-5292 |
url |
http://dx.doi.org/10.1016/j.jenvman.2017.09.006 http://hdl.handle.net/11449/175140 |
identifier_str_mv |
Journal of Environmental Management, v. 204, p. 255-263. 1095-8630 0301-4797 10.1016/j.jenvman.2017.09.006 2-s2.0-85028935444 2-s2.0-85028935444.pdf 9220348583560043 0854403148709775 0000-0001-7040-1983 0000-0003-4886-5292 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Environmental Management 1,161 1,161 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
255-263 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_ |
1808128915090178048 |