Electrodialytic recovery of rare earth elements from coal ashes

Detalhes bibliográficos
Autor(a) principal: Couto, Nazaré
Data de Publicação: 2020
Outros Autores: Ferreira, Ana Rita, Lopes, Vanda L. M., Peters, Stephen C., Mateus, Eduardo P., Ribeiro, Alexandra B., Pamukcu, Sibel
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/104138
Resumo: Fundação para a Ciência e a Tecnologia, I.P., Portugal, UIDB/04085/2020 (Research unit CENSE “Center for Environmental and Sustainability Research”). Fundação para a Ciência e a Tecnologia is also acknowledged for N. Couto Contract established under Individual Call to Scientific Employment Stimulus (CEECIND/04210/2017).
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spelling Electrodialytic recovery of rare earth elements from coal ashesCoal ashCritical raw materialsElectrodialytic separationHREELREEChemical Engineering(all)ElectrochemistryFundação para a Ciência e a Tecnologia, I.P., Portugal, UIDB/04085/2020 (Research unit CENSE “Center for Environmental and Sustainability Research”). Fundação para a Ciência e a Tecnologia is also acknowledged for N. Couto Contract established under Individual Call to Scientific Employment Stimulus (CEECIND/04210/2017).Rare earth elements (REE) are critical raw materials crucial for modern technologies and used in a variety of industries. There is a need of investment in REE recovery from secondary sources. The present work was designed to assess the potential of the electrodialytic process to recover REE from coal ash. The content of REE was evaluated in bituminous and anthracite ash. Anthracite presented higher REE concentration (447 ppm vs. 138 ppm) and a triple concentration of critical REE compared with bituminous ash. Anthracite ash was treated aiming to test the REE recover potential, including differences between light REE (LREE) and heavy REE (HREE) fractions as well as the specific recovery of REE with high criticality. A two-compartment electrodialytic cell was tested with the matrix placed in the anode compartment and a cation-exchange membrane separating the compartments. Experiments lasted a maximum of 7 days applying different current intensities and pH adjustment in the catholyte (≈ 2). Three main steps are observed in the removal process 1) REE solubilization - from the solid to the liquid phase (anolyte); 2) REE mobilization - movement from the anolyte towards the cathode end; 3) REE removal - presence in the catholyte. The extent of each step observed for the REE depends on their individual position in the periodic table with HREE removal being more regulated by step 1 and LREE by step 2. At the best tested conditions (50 mA, 3 days, pH adjustment), more than 70% of REE were extracted from the ash with the catholyte enclosing up to ≈ 50% of LREE and HREE. Combining the high criticality of neodymium with its high concentration in anthracite coal ash (65 ppm), the electrodialytic treatment is highly recommended to concentrate this REE in the catholyte. The results demonstrated the proof-of-concept for electro-assisted extraction of REE from anthracite coal ash, opening perspectives to a selective recovery of these elements from secondary sources.CENSE - Centro de Investigação em Ambiente e SustentabilidadeDCEA - Departamento de Ciências e Engenharia do AmbienteRUNCouto, NazaréFerreira, Ana RitaLopes, Vanda L. M.Peters, Stephen C.Mateus, Eduardo P.Ribeiro, Alexandra B.Pamukcu, Sibel2022-03-31T00:31:40Z2020-11-012020-11-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10362/104138eng0013-4686PURE: 19848123https://doi.org/10.1016/j.electacta.2020.136934info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:49:39Zoai:run.unl.pt:10362/104138Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:40:08.619136Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Electrodialytic recovery of rare earth elements from coal ashes
title Electrodialytic recovery of rare earth elements from coal ashes
spellingShingle Electrodialytic recovery of rare earth elements from coal ashes
Couto, Nazaré
Coal ash
Critical raw materials
Electrodialytic separation
HREE
LREE
Chemical Engineering(all)
Electrochemistry
title_short Electrodialytic recovery of rare earth elements from coal ashes
title_full Electrodialytic recovery of rare earth elements from coal ashes
title_fullStr Electrodialytic recovery of rare earth elements from coal ashes
title_full_unstemmed Electrodialytic recovery of rare earth elements from coal ashes
title_sort Electrodialytic recovery of rare earth elements from coal ashes
author Couto, Nazaré
author_facet Couto, Nazaré
Ferreira, Ana Rita
Lopes, Vanda L. M.
Peters, Stephen C.
Mateus, Eduardo P.
Ribeiro, Alexandra B.
Pamukcu, Sibel
author_role author
author2 Ferreira, Ana Rita
Lopes, Vanda L. M.
Peters, Stephen C.
Mateus, Eduardo P.
Ribeiro, Alexandra B.
Pamukcu, Sibel
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv CENSE - Centro de Investigação em Ambiente e Sustentabilidade
DCEA - Departamento de Ciências e Engenharia do Ambiente
RUN
dc.contributor.author.fl_str_mv Couto, Nazaré
Ferreira, Ana Rita
Lopes, Vanda L. M.
Peters, Stephen C.
Mateus, Eduardo P.
Ribeiro, Alexandra B.
Pamukcu, Sibel
dc.subject.por.fl_str_mv Coal ash
Critical raw materials
Electrodialytic separation
HREE
LREE
Chemical Engineering(all)
Electrochemistry
topic Coal ash
Critical raw materials
Electrodialytic separation
HREE
LREE
Chemical Engineering(all)
Electrochemistry
description Fundação para a Ciência e a Tecnologia, I.P., Portugal, UIDB/04085/2020 (Research unit CENSE “Center for Environmental and Sustainability Research”). Fundação para a Ciência e a Tecnologia is also acknowledged for N. Couto Contract established under Individual Call to Scientific Employment Stimulus (CEECIND/04210/2017).
publishDate 2020
dc.date.none.fl_str_mv 2020-11-01
2020-11-01T00:00:00Z
2022-03-31T00:31:40Z
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://hdl.handle.net/10362/104138
url http://hdl.handle.net/10362/104138
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0013-4686
PURE: 19848123
https://doi.org/10.1016/j.electacta.2020.136934
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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