Integrating ZVI-dehalogenation into an electrolytic soil-washing cell

Combination into a single electrochemical reactor of soil washing, ZVI dehalogenation and anodic oxidation can be used to degrade directly the clopyralid contained in spiked soil. Treatment is efficient, achieving the complete removal of chlorinated organics as well as the complete mineralization of...

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Autores: Carvalho De Almeida, C., Muñoz Morales, Martín, Sáez Jiménez, Cristina, Cañizares Cañizares, Pablo, Martínez Huitle, Carlos Alberto, Rodrigo Rodrigo, Manuel Andrés
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:10578/29302
Acceso en línea:https://doi.org/10.1016/j.seppur.2018.09.065
http://hdl.handle.net/10578/29302
Access Level:acceso abierto
Palabra clave:Soil washing
Clopyralid
Electrolysis
Diamond anodes
ZVI
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spelling Integrating ZVI-dehalogenation into an electrolytic soil-washing cellCarvalho De Almeida, C.Muñoz Morales, MartínSáez Jiménez, CristinaCañizares Cañizares, PabloMartínez Huitle, Carlos AlbertoRodrigo Rodrigo, Manuel AndrésSoil washingClopyralidElectrolysisDiamond anodesZVICombination into a single electrochemical reactor of soil washing, ZVI dehalogenation and anodic oxidation can be used to degrade directly the clopyralid contained in spiked soil. Treatment is efficient, achieving the complete removal of chlorinated organics as well as the complete mineralization of the liquid waste produced. However, this combined process does not seem to improve the efficiency with respect to a system operated without addition of iron. Results show that the dechlorinated intermediates formed are less reactive than the parent pollutants, being particularly important the formation of oxalic acid, because its combination with iron (II) helps to explain the decrease in the overall rate of mineralization. This negative impact on the efficiency of the electrochemical process is not completely undesirable, because the toxicity of the waste decreases importantly in the very early stages with the use of iron, opening the possibility of a combination with biological treatments. Again, the accumulation of oxalate intermediates helps to explain this conclusion. Results point out the important effect of the size of iron particles used on the treatment and the complexity of the mechanisms that develop in the cell, which are explained in terms of the different parameters monitored.Elsevier202220222019info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://doi.org/10.1016/j.seppur.2018.09.065http://hdl.handle.net/10578/29302reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésSpanish Ministry of Economy, Industry and Competitiveness, European Union through project CTM2016-76197-R (AEI/FEDER, UE)Spanish Government (Grant N° FPU16/00067)info:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/293022026-05-27T07:36:41Z
dc.title.none.fl_str_mv Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
title Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
spellingShingle Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
Carvalho De Almeida, C.
Soil washing
Clopyralid
Electrolysis
Diamond anodes
ZVI
title_short Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
title_full Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
title_fullStr Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
title_full_unstemmed Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
title_sort Integrating ZVI-dehalogenation into an electrolytic soil-washing cell
dc.creator.none.fl_str_mv Carvalho De Almeida, C.
Muñoz Morales, Martín
Sáez Jiménez, Cristina
Cañizares Cañizares, Pablo
Martínez Huitle, Carlos Alberto
Rodrigo Rodrigo, Manuel Andrés
author Carvalho De Almeida, C.
author_facet Carvalho De Almeida, C.
Muñoz Morales, Martín
Sáez Jiménez, Cristina
Cañizares Cañizares, Pablo
Martínez Huitle, Carlos Alberto
Rodrigo Rodrigo, Manuel Andrés
author_role author
author2 Muñoz Morales, Martín
Sáez Jiménez, Cristina
Cañizares Cañizares, Pablo
Martínez Huitle, Carlos Alberto
Rodrigo Rodrigo, Manuel Andrés
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Soil washing
Clopyralid
Electrolysis
Diamond anodes
ZVI
topic Soil washing
Clopyralid
Electrolysis
Diamond anodes
ZVI
description Combination into a single electrochemical reactor of soil washing, ZVI dehalogenation and anodic oxidation can be used to degrade directly the clopyralid contained in spiked soil. Treatment is efficient, achieving the complete removal of chlorinated organics as well as the complete mineralization of the liquid waste produced. However, this combined process does not seem to improve the efficiency with respect to a system operated without addition of iron. Results show that the dechlorinated intermediates formed are less reactive than the parent pollutants, being particularly important the formation of oxalic acid, because its combination with iron (II) helps to explain the decrease in the overall rate of mineralization. This negative impact on the efficiency of the electrochemical process is not completely undesirable, because the toxicity of the waste decreases importantly in the very early stages with the use of iron, opening the possibility of a combination with biological treatments. Again, the accumulation of oxalate intermediates helps to explain this conclusion. Results point out the important effect of the size of iron particles used on the treatment and the complexity of the mechanisms that develop in the cell, which are explained in terms of the different parameters monitored.
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.seppur.2018.09.065
http://hdl.handle.net/10578/29302
url https://doi.org/10.1016/j.seppur.2018.09.065
http://hdl.handle.net/10578/29302
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, European Union through project CTM2016-76197-R (AEI/FEDER, UE)
Spanish Government (Grant N° FPU16/00067)
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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score 15.300719

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