Waste-to-energy bottom ash management: Copper recovery by electrowinning

Municipal solid waste (MSW) incineration process generates 0.2 tons of bottom ash (BA) per ton of waste. BA contains significant quantities of potentially harmful and/or value-added metallic species such as Cu, which can be leached and discharged into the environment unless they are conveniently man...

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Autores: Reig, Mònica, Vecino, Xanel, Valderrama, César, Sirés Sadornil, Ignacio, Cortina Pallàs, José Luis
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/194598
Acesso em linha:https://hdl.handle.net/2445/194598
Access Level:acceso abierto
Palavra-chave:Economia circular
Residus
Incineració
Circular economy
Waste products
Incineration
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spelling Waste-to-energy bottom ash management: Copper recovery by electrowinningReig, MònicaVecino, XanelValderrama, CésarSirés Sadornil, IgnacioCortina Pallàs, José LuisEconomia circularResidusIncineracióCircular economyWaste productsIncinerationMunicipal solid waste (MSW) incineration process generates 0.2 tons of bottom ash (BA) per ton of waste. BA contains significant quantities of potentially harmful and/or value-added metallic species such as Cu, which can be leached and discharged into the environment unless they are conveniently managed. The reduction of metal content in BA would allow its use in different applications (e.g., concrete pavement bases and subbases), thus promoting circular economy schemes. In this work, the feasibility of Cu recovery from BA has been studied for the first time by integrating solid-liquid (SL) extraction and electrowinning (EW). First, the leaching of metallic elements from BA was carried out using H2SO4. The resulting leachate, which contained Cu as well as Al, P, Zn, Ca, Fe, Mg, Na, K and Mn as major elements, served as feed stream in the electrochemical process. The EW parallel-plate cell operated in batch mode was composed of one Ti|IrO2 anode placed between two AISI 304 stainless-steel cathodes (interelectrode distance of 2 cm). The operation parameters under investigation to achieve the maximum electrochemical Cu recovery were: initial Cu2+ concentration (0.1-1 g/L), pH (0.5-1.5), current density (100-300 A/m2) and electrodeposition time (2-7 h). It was possible to extract more than 98 % of Cu from the leached stream by EW and to recover almost 90 % in the cathodes from a 1 g/L Cu solution at pH 1.5, operating at 200 A/m2 for 5 h. Therefore, the integration of SL and EW processes offers an attractive alternative for the valorization of BA from MSW. The recovered high-purity Cu could be used in several high-tech sectors, such as batteries, fuel cells, electric traction motors, wind energy, photovoltaics technology, robotics, drones, 3D printing and digital technologies, in good agreement with current circular economy and waste-to-energy approaches.Elsevier B.V.2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/194598Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1016/j.seppur.2023.123256Separation and Purification Technology, 2023, vol. 311, p. 123256https://doi.org/10.1016/j.seppur.2023.123256cc-by-nc-nd (c) Reig, Mònica et al., 2023https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1945982026-05-27T06:46:51Z
dc.title.none.fl_str_mv Waste-to-energy bottom ash management: Copper recovery by electrowinning
title Waste-to-energy bottom ash management: Copper recovery by electrowinning
spellingShingle Waste-to-energy bottom ash management: Copper recovery by electrowinning
Reig, Mònica
Economia circular
Residus
Incineració
Circular economy
Waste products
Incineration
title_short Waste-to-energy bottom ash management: Copper recovery by electrowinning
title_full Waste-to-energy bottom ash management: Copper recovery by electrowinning
title_fullStr Waste-to-energy bottom ash management: Copper recovery by electrowinning
title_full_unstemmed Waste-to-energy bottom ash management: Copper recovery by electrowinning
title_sort Waste-to-energy bottom ash management: Copper recovery by electrowinning
dc.creator.none.fl_str_mv Reig, Mònica
Vecino, Xanel
Valderrama, César
Sirés Sadornil, Ignacio
Cortina Pallàs, José Luis
author Reig, Mònica
author_facet Reig, Mònica
Vecino, Xanel
Valderrama, César
Sirés Sadornil, Ignacio
Cortina Pallàs, José Luis
author_role author
author2 Vecino, Xanel
Valderrama, César
Sirés Sadornil, Ignacio
Cortina Pallàs, José Luis
author2_role author
author
author
author
dc.subject.none.fl_str_mv Economia circular
Residus
Incineració
Circular economy
Waste products
Incineration
topic Economia circular
Residus
Incineració
Circular economy
Waste products
Incineration
description Municipal solid waste (MSW) incineration process generates 0.2 tons of bottom ash (BA) per ton of waste. BA contains significant quantities of potentially harmful and/or value-added metallic species such as Cu, which can be leached and discharged into the environment unless they are conveniently managed. The reduction of metal content in BA would allow its use in different applications (e.g., concrete pavement bases and subbases), thus promoting circular economy schemes. In this work, the feasibility of Cu recovery from BA has been studied for the first time by integrating solid-liquid (SL) extraction and electrowinning (EW). First, the leaching of metallic elements from BA was carried out using H2SO4. The resulting leachate, which contained Cu as well as Al, P, Zn, Ca, Fe, Mg, Na, K and Mn as major elements, served as feed stream in the electrochemical process. The EW parallel-plate cell operated in batch mode was composed of one Ti|IrO2 anode placed between two AISI 304 stainless-steel cathodes (interelectrode distance of 2 cm). The operation parameters under investigation to achieve the maximum electrochemical Cu recovery were: initial Cu2+ concentration (0.1-1 g/L), pH (0.5-1.5), current density (100-300 A/m2) and electrodeposition time (2-7 h). It was possible to extract more than 98 % of Cu from the leached stream by EW and to recover almost 90 % in the cathodes from a 1 g/L Cu solution at pH 1.5, operating at 200 A/m2 for 5 h. Therefore, the integration of SL and EW processes offers an attractive alternative for the valorization of BA from MSW. The recovered high-purity Cu could be used in several high-tech sectors, such as batteries, fuel cells, electric traction motors, wind energy, photovoltaics technology, robotics, drones, 3D printing and digital technologies, in good agreement with current circular economy and waste-to-energy approaches.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/194598
url https://hdl.handle.net/2445/194598
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1016/j.seppur.2023.123256
Separation and Purification Technology, 2023, vol. 311, p. 123256
https://doi.org/10.1016/j.seppur.2023.123256
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Reig, Mònica et al., 2023
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Reig, Mònica et al., 2023
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 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 Articles publicats en revistes (Ciència dels Materials i Química Física)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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