Electrochemical production of perchlorate as an alternative for the valorization of brines

In this work, the valorization of brines, with concentrations similar to those produced by reverse osmosis or electrodialysis processes, by electrolysis with diamond anodes is evaluated. To do this, synthetic brines made from solutions of NaCl (with target concentrations ranging from 1.0 to 2.0 M an...

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Detalles Bibliográficos
Autores: Llanos López, Javier, Moraleda Núñez, Inmaculada, Sáez Jiménez, Cristina, Rodrigo Rodrigo, Manuel Andrés, Cañizares Cañizares, Pablo
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/29289
Acceso en línea:https://doi.org/10.1016/j.chemosphere.2018.12.153
http://hdl.handle.net/10578/29289
Access Level:acceso abierto
Palabra clave:Boron-doped diamond
Perchlorate production
Power consumption
Electrolysis
Desalinization
Valorization
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spelling Electrochemical production of perchlorate as an alternative for the valorization of brinesLlanos López, JavierMoraleda Núñez, InmaculadaSáez Jiménez, CristinaRodrigo Rodrigo, Manuel AndrésCañizares Cañizares, PabloBoron-doped diamondPerchlorate productionPower consumptionElectrolysisDesalinizationValorizationIn this work, the valorization of brines, with concentrations similar to those produced by reverse osmosis or electrodialysis processes, by electrolysis with diamond anodes is evaluated. To do this, synthetic brines made from solutions of NaCl (with target concentrations ranging from 1.0 to 2.0 M and an additional test at 5.0 M) were used as the raw material for the electrochemical production of perchlorate using commercial electrochemical cells equipped with boron-doped diamond (BDD) anodes. The effect of key parameters on the rate and efficiency of perchlorate production was evaluated. The results show that it is possible to transform more than 80% of the initial chloride concentration into perchlorate, with current efficiencies higher than 70% regardless of the initial concentration of sodium chloride contained in the brine. Moreover, it was observed that both hypochlorite and chlorate were produced almost simultaneously at the beginning of electrolysis, while perchlorate was only produced when a certain value of applied electric charge was passed through the system. The results obtained were essentially independent of the concentration of NaCl, as the high concentrations used in this study avoided mass transfer limitations. Moreover, the specific energy cost of perchlorate production was estimated to range from 26.14 kWh kg−1 (for 2.0 M and 1000 A m−2) to 56.10 kWh kg−1 (for 1.0 M and 2000 A m−2). According to the results obtained, the electrochemical production of perchlorate by BDD electrochemical oxidation stands out as a promising novel technology for the valorization of the brine produced in reverse osmosis or electrodialysis processes.Elsevier202220222019info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.chemosphere.2018.12.153http://hdl.handle.net/10578/29289reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésSpanish Ministry of Economy, Industry and Competitiveness and European Union project CTM2016-76197-R (AEI/FEDER, UE)info:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/292892026-05-27T07:36:41Z
dc.title.none.fl_str_mv Electrochemical production of perchlorate as an alternative for the valorization of brines
title Electrochemical production of perchlorate as an alternative for the valorization of brines
spellingShingle Electrochemical production of perchlorate as an alternative for the valorization of brines
Llanos López, Javier
Boron-doped diamond
Perchlorate production
Power consumption
Electrolysis
Desalinization
Valorization
title_short Electrochemical production of perchlorate as an alternative for the valorization of brines
title_full Electrochemical production of perchlorate as an alternative for the valorization of brines
title_fullStr Electrochemical production of perchlorate as an alternative for the valorization of brines
title_full_unstemmed Electrochemical production of perchlorate as an alternative for the valorization of brines
title_sort Electrochemical production of perchlorate as an alternative for the valorization of brines
dc.creator.none.fl_str_mv Llanos López, Javier
Moraleda Núñez, Inmaculada
Sáez Jiménez, Cristina
Rodrigo Rodrigo, Manuel Andrés
Cañizares Cañizares, Pablo
author Llanos López, Javier
author_facet Llanos López, Javier
Moraleda Núñez, Inmaculada
Sáez Jiménez, Cristina
Rodrigo Rodrigo, Manuel Andrés
Cañizares Cañizares, Pablo
author_role author
author2 Moraleda Núñez, Inmaculada
Sáez Jiménez, Cristina
Rodrigo Rodrigo, Manuel Andrés
Cañizares Cañizares, Pablo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Boron-doped diamond
Perchlorate production
Power consumption
Electrolysis
Desalinization
Valorization
topic Boron-doped diamond
Perchlorate production
Power consumption
Electrolysis
Desalinization
Valorization
description In this work, the valorization of brines, with concentrations similar to those produced by reverse osmosis or electrodialysis processes, by electrolysis with diamond anodes is evaluated. To do this, synthetic brines made from solutions of NaCl (with target concentrations ranging from 1.0 to 2.0 M and an additional test at 5.0 M) were used as the raw material for the electrochemical production of perchlorate using commercial electrochemical cells equipped with boron-doped diamond (BDD) anodes. The effect of key parameters on the rate and efficiency of perchlorate production was evaluated. The results show that it is possible to transform more than 80% of the initial chloride concentration into perchlorate, with current efficiencies higher than 70% regardless of the initial concentration of sodium chloride contained in the brine. Moreover, it was observed that both hypochlorite and chlorate were produced almost simultaneously at the beginning of electrolysis, while perchlorate was only produced when a certain value of applied electric charge was passed through the system. The results obtained were essentially independent of the concentration of NaCl, as the high concentrations used in this study avoided mass transfer limitations. Moreover, the specific energy cost of perchlorate production was estimated to range from 26.14 kWh kg−1 (for 2.0 M and 1000 A m−2) to 56.10 kWh kg−1 (for 1.0 M and 2000 A m−2). According to the results obtained, the electrochemical production of perchlorate by BDD electrochemical oxidation stands out as a promising novel technology for the valorization of the brine produced in reverse osmosis or electrodialysis processes.
publishDate 2019
dc.date.none.fl_str_mv 2019
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://doi.org/10.1016/j.chemosphere.2018.12.153
http://hdl.handle.net/10578/29289
url https://doi.org/10.1016/j.chemosphere.2018.12.153
http://hdl.handle.net/10578/29289
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Spanish Ministry of Economy, Industry and Competitiveness and European Union project CTM2016-76197-R (AEI/FEDER, UE)
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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