Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes

This work proves the feasibility of dechlorinating 2,4-D, a customary commercial herbicide, using cathodic electrocatalysis driven by the anodic microbial electrooxidation of sodium acetate. A set of microbial electrochemical systems (MES) were run under two different operating modes, namely microbi...

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Authors: León Fernández, Luis Fernando, Domínguez Benetton, Xochitl, Villaseñor Camacho, José, Fernández Morales, Francisco Jesús
Format: article
Publication Date:2023
Country:España
Institution:Universidad de Castilla-La Mancha
Repository:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/33035
Online Access:https://hdl.handle.net/10578/33035
Access Level:Open access
Keyword:Feasibility
Cathodic elec-trodechlorination of 2,4-D
Bioanode
Microbial fuel
Dechlorination
Electroactive microbial anodes
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spelling Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodesLeón Fernández, Luis FernandoDomínguez Benetton, XochitlVillaseñor Camacho, JoséFernández Morales, Francisco JesúsFeasibilityCathodic elec-trodechlorination of 2,4-DBioanodeMicrobial fuelDechlorinationElectroactive microbial anodesThis work proves the feasibility of dechlorinating 2,4-D, a customary commercial herbicide, using cathodic electrocatalysis driven by the anodic microbial electrooxidation of sodium acetate. A set of microbial electrochemical systems (MES) were run under two different operating modes, namely microbial fuel cell (MFC) mode, with an external resistance of 120 O, or microbial electrolysis cell (MEC) mode, by supplying external voltage (0.6 V) for promoting the (bio)electrochemical reactions taking place. When operating the MES as an MFC, 32% dechlorination was obtained after 72 h of treatment, which was further enhanced by working under MEC mode and achieving a 79% dechlorination. In addition, the biodegradability (expressed as the ratio BOD/COD) of the synthetic polluted wastewater was tested prior and after the MES treatment, which was improved from negative values (corresponding to toxic effluents) up to 0.135 in the MFC and 0.453 in the MEC. Our MES approach proves to be a favourable option from the point of view of energy consumption. Running the system under MFC mode allowed to co-generate energy along the dechlorination process (-0.0120 kWh mol-1), even though low removal rates were attained. The energy input under MEC operation was 1.03 kWh mol-1—a competitive value compared to previous works reported in the literature for (non-biological) electrochemical reactors for 2,4-D electrodechlorination.WILEY202420242023info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttps://hdl.handle.net/10578/33035reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésCTM2016-76197-REQC2018-004240-PBES-2017-081718826312info:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/330352026-05-27T07:36:41Z
dc.title.none.fl_str_mv Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
title Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
spellingShingle Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
León Fernández, Luis Fernando
Feasibility
Cathodic elec-trodechlorination of 2,4-D
Bioanode
Microbial fuel
Dechlorination
Electroactive microbial anodes
title_short Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
title_full Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
title_fullStr Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
title_full_unstemmed Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
title_sort Coupling the electrocatalytic dechlorination of 2,4-D with electroactive microbial anodes
dc.creator.none.fl_str_mv León Fernández, Luis Fernando
Domínguez Benetton, Xochitl
Villaseñor Camacho, José
Fernández Morales, Francisco Jesús
author León Fernández, Luis Fernando
author_facet León Fernández, Luis Fernando
Domínguez Benetton, Xochitl
Villaseñor Camacho, José
Fernández Morales, Francisco Jesús
author_role author
author2 Domínguez Benetton, Xochitl
Villaseñor Camacho, José
Fernández Morales, Francisco Jesús
author2_role author
author
author
dc.subject.none.fl_str_mv Feasibility
Cathodic elec-trodechlorination of 2,4-D
Bioanode
Microbial fuel
Dechlorination
Electroactive microbial anodes
topic Feasibility
Cathodic elec-trodechlorination of 2,4-D
Bioanode
Microbial fuel
Dechlorination
Electroactive microbial anodes
description This work proves the feasibility of dechlorinating 2,4-D, a customary commercial herbicide, using cathodic electrocatalysis driven by the anodic microbial electrooxidation of sodium acetate. A set of microbial electrochemical systems (MES) were run under two different operating modes, namely microbial fuel cell (MFC) mode, with an external resistance of 120 O, or microbial electrolysis cell (MEC) mode, by supplying external voltage (0.6 V) for promoting the (bio)electrochemical reactions taking place. When operating the MES as an MFC, 32% dechlorination was obtained after 72 h of treatment, which was further enhanced by working under MEC mode and achieving a 79% dechlorination. In addition, the biodegradability (expressed as the ratio BOD/COD) of the synthetic polluted wastewater was tested prior and after the MES treatment, which was improved from negative values (corresponding to toxic effluents) up to 0.135 in the MFC and 0.453 in the MEC. Our MES approach proves to be a favourable option from the point of view of energy consumption. Running the system under MFC mode allowed to co-generate energy along the dechlorination process (-0.0120 kWh mol-1), even though low removal rates were attained. The energy input under MEC operation was 1.03 kWh mol-1—a competitive value compared to previous works reported in the literature for (non-biological) electrochemical reactors for 2,4-D electrodechlorination.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10578/33035
url https://hdl.handle.net/10578/33035
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv CTM2016-76197-R
EQC2018-004240-P
BES-2017-081718
826312
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 WILEY
publisher.none.fl_str_mv WILEY
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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