On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram
Autor(a) principal: | |
---|---|
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/10.1016/j.apcatb.2017.12.072 http://hdl.handle.net/11449/164029 |
Resumo: | Four different treatment methods based on the HO center dot production were assessed to oxidize and mineralize the herbicide picloram (PCL), which is considered very toxic and so is a potential contaminant of surface and ground water. The processes based on the Fenton type (homolysis reaction of HOCl by Fe+ ions) and photo-Fenton type reaction (using a 9 W UVA light) with in situ electrogenerated HOCl species, using a commercial D5Ae anode in the presence of Cl ions, led to poor mineralization performances in comparison to the HOCI/UVC process. In that case, the homolysis reaction of HOC1 mediated by a 5 or 9 W UVC light resulted in almost complete removal of the organic load within 12 h of treatment, from acidic to neutral solutions and using 1 g L-1 of NaCl concentration after optimization of the experimental conditions. When the HOCl/UVC process using a 5 W UVC light is compared to the electrochemical method using a boron-doped diamond anode (electrochemical/BDD), the oxidation and mineralization rates of the HOC1/UVC process were always superior, with- 95% removal of total organic carbon (TOC) after 12 h treatment. The energy consumption per unit mass of removed TOC remained around 4 and 8 kW h g(-1) for the HOC1/UVC and electrochemical/BDD treatment processes after 90% removal of TOC, respectively, even considering the energy consumption of the UVC lamp. In the final treatment stages, high CO2 conversions were obtained using both methods, as the generated intermediates were almost completely eliminated. Finally, the HOCI/UVC process is a reasonable option to treat solutions contaminated with organic pollutants as the common problems associated with the Fenton based (acidic solution, Fe2+ ion recovery, generation of H2O2) and electrochemical/BDD (mass transport) processes can be readily circumvented. |
id |
UNSP_8715bd758776850f96984d0eb96b4703 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/164029 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloramFenton like reactionSynthetic organic pollutantsOrganochlorine compoundsMixed oxide anodeHybrid methodsFour different treatment methods based on the HO center dot production were assessed to oxidize and mineralize the herbicide picloram (PCL), which is considered very toxic and so is a potential contaminant of surface and ground water. The processes based on the Fenton type (homolysis reaction of HOCl by Fe+ ions) and photo-Fenton type reaction (using a 9 W UVA light) with in situ electrogenerated HOCl species, using a commercial D5Ae anode in the presence of Cl ions, led to poor mineralization performances in comparison to the HOCI/UVC process. In that case, the homolysis reaction of HOC1 mediated by a 5 or 9 W UVC light resulted in almost complete removal of the organic load within 12 h of treatment, from acidic to neutral solutions and using 1 g L-1 of NaCl concentration after optimization of the experimental conditions. When the HOCl/UVC process using a 5 W UVC light is compared to the electrochemical method using a boron-doped diamond anode (electrochemical/BDD), the oxidation and mineralization rates of the HOC1/UVC process were always superior, with- 95% removal of total organic carbon (TOC) after 12 h treatment. The energy consumption per unit mass of removed TOC remained around 4 and 8 kW h g(-1) for the HOC1/UVC and electrochemical/BDD treatment processes after 90% removal of TOC, respectively, even considering the energy consumption of the UVC lamp. In the final treatment stages, high CO2 conversions were obtained using both methods, as the generated intermediates were almost completely eliminated. Finally, the HOCI/UVC process is a reasonable option to treat solutions contaminated with organic pollutants as the common problems associated with the Fenton based (acidic solution, Fe2+ ion recovery, generation of H2O2) and electrochemical/BDD (mass transport) processes can be readily circumvented.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, BrazilUniv Estadual Paulista, Inst Quim Araraquara, Dept Quim Analit, BR-14800900 Araraquara, SP, BrazilUniv Estadual Paulista, Inst Quim Araraquara, Dept Quim Analit, BR-14800900 Araraquara, SP, BrazilFAPESP: 2008/10449-7Elsevier B.V.Universidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Coledam, Douglas A. C.Sanchez-Montes, IsaacSilva, Bianca F. [UNESP]Aquino, Jose M.2018-11-26T17:48:50Z2018-11-26T17:48:50Z2018-07-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article170-177application/pdfhttp://dx.doi.org/10.1016/j.apcatb.2017.12.072Applied Catalysis B-environmental. Amsterdam: Elsevier Science Bv, v. 227, p. 170-177, 2018.0926-3373http://hdl.handle.net/11449/16402910.1016/j.apcatb.2017.12.072WOS:000428491000018WOS000428491000018.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengApplied Catalysis B-environmental3,152info:eu-repo/semantics/openAccess2023-10-04T06:05:26Zoai:repositorio.unesp.br:11449/164029Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-04T06:05:26Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram |
title |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram |
spellingShingle |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram Coledam, Douglas A. C. Fenton like reaction Synthetic organic pollutants Organochlorine compounds Mixed oxide anode Hybrid methods |
title_short |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram |
title_full |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram |
title_fullStr |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram |
title_full_unstemmed |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram |
title_sort |
On the performance of HOCl/Fe2+, HOCl/Fe2+/UVA, and HOCl/UVC processes using in situ electrogenerated active chlorine to mineralize the herbicide picloram |
author |
Coledam, Douglas A. C. |
author_facet |
Coledam, Douglas A. C. Sanchez-Montes, Isaac Silva, Bianca F. [UNESP] Aquino, Jose M. |
author_role |
author |
author2 |
Sanchez-Montes, Isaac Silva, Bianca F. [UNESP] Aquino, Jose M. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Coledam, Douglas A. C. Sanchez-Montes, Isaac Silva, Bianca F. [UNESP] Aquino, Jose M. |
dc.subject.por.fl_str_mv |
Fenton like reaction Synthetic organic pollutants Organochlorine compounds Mixed oxide anode Hybrid methods |
topic |
Fenton like reaction Synthetic organic pollutants Organochlorine compounds Mixed oxide anode Hybrid methods |
description |
Four different treatment methods based on the HO center dot production were assessed to oxidize and mineralize the herbicide picloram (PCL), which is considered very toxic and so is a potential contaminant of surface and ground water. The processes based on the Fenton type (homolysis reaction of HOCl by Fe+ ions) and photo-Fenton type reaction (using a 9 W UVA light) with in situ electrogenerated HOCl species, using a commercial D5Ae anode in the presence of Cl ions, led to poor mineralization performances in comparison to the HOCI/UVC process. In that case, the homolysis reaction of HOC1 mediated by a 5 or 9 W UVC light resulted in almost complete removal of the organic load within 12 h of treatment, from acidic to neutral solutions and using 1 g L-1 of NaCl concentration after optimization of the experimental conditions. When the HOCl/UVC process using a 5 W UVC light is compared to the electrochemical method using a boron-doped diamond anode (electrochemical/BDD), the oxidation and mineralization rates of the HOC1/UVC process were always superior, with- 95% removal of total organic carbon (TOC) after 12 h treatment. The energy consumption per unit mass of removed TOC remained around 4 and 8 kW h g(-1) for the HOC1/UVC and electrochemical/BDD treatment processes after 90% removal of TOC, respectively, even considering the energy consumption of the UVC lamp. In the final treatment stages, high CO2 conversions were obtained using both methods, as the generated intermediates were almost completely eliminated. Finally, the HOCI/UVC process is a reasonable option to treat solutions contaminated with organic pollutants as the common problems associated with the Fenton based (acidic solution, Fe2+ ion recovery, generation of H2O2) and electrochemical/BDD (mass transport) processes can be readily circumvented. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-26T17:48:50Z 2018-11-26T17:48:50Z 2018-07-05 |
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.apcatb.2017.12.072 Applied Catalysis B-environmental. Amsterdam: Elsevier Science Bv, v. 227, p. 170-177, 2018. 0926-3373 http://hdl.handle.net/11449/164029 10.1016/j.apcatb.2017.12.072 WOS:000428491000018 WOS000428491000018.pdf |
url |
http://dx.doi.org/10.1016/j.apcatb.2017.12.072 http://hdl.handle.net/11449/164029 |
identifier_str_mv |
Applied Catalysis B-environmental. Amsterdam: Elsevier Science Bv, v. 227, p. 170-177, 2018. 0926-3373 10.1016/j.apcatb.2017.12.072 WOS:000428491000018 WOS000428491000018.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Applied Catalysis B-environmental 3,152 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
170-177 application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1799964430354612224 |