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Recovery of Nd3+ and Dy3+ from E-Waste Using Adsorbents from Spent Tyre Rubbers: Batch and Column Dynamic Assays

2025-01Journal article Open access
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datacite.subject.fosCiências Naturais::Ciências Químicas
datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
datacite.subject.sdg13:Ação Climática
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
datacite.subject.sdg12:Produção e Consumo Sustentáveis
datacite.subject.sdg07:Energias Renováveis e Acessíveis
dc.contributor.authorNogueira, Miguel
dc.contributor.authorMatos, Inês
dc.contributor.authorBernardo, Maria
dc.contributor.authorPinto, Filomena
dc.contributor.authorFonseca, Isabel Maria
dc.contributor.authorLapa, Nuno
dc.date.accessioned2025-04-11T09:46:14Z
dc.date.available2025-04-11T09:46:14Z
dc.date.issued2025-01
dc.description.abstractABSTRACT: This paper investigates the use of spent tyre rubber as a precursor for synthesising adsorbents to recover rare earth elements. Through pyrolysis and CO2 activation, tyre rubber is converted into porous carbonaceous materials with surface properties suited for rare earth element adsorption. The study also examines the efficiency of leaching rare earth elements from NdFeB magnets using optimised acid leaching methods, providing insights into recovery processes. The adsorption capacity of the materials was assessed through batch adsorption assays targeting neodymium (Nd3+) and dysprosium (Dy3+) ions. Results highlight the superior performance of activated carbon derived from tyre rubber following CO2 activation, with the best-performing adsorbent achieving maximum uptake capacities of 24.7 mg.g(-1) for Nd3+ and 34.4 mg.g(-1) for Dy3+. Column studies revealed efficient adsorption of Nd3+ and Dy3+ from synthetic and real magnet leachates with a maximum uptake capacity of 1.36 mg.g(-1) for Nd3+ in real leachates and breakthrough times of 25 min. Bi-component assays showed no adverse effects when both ions were present, supporting their potential for simultaneous recovery. Furthermore, the adsorbents effectively recovered rare earth elements from e-waste magnet leachates, demonstrating practical applicability. This research underscores the potential of tyre rubber-derived adsorbents to enhance sustainability in critical raw material supply chains. By repurposing waste tyre rubber, these materials offer a sustainable solution for rare earth recovery, addressing resource scarcity while aligning with circular economy principles by diverting waste from landfills and creating value-added products.eng
dc.identifier.citationNogueira, M., Matos, I., Bernardo, M., Pinto, F., Fonseca, I. & Lapa, N. (2025) Recovery of Nd3+ and Dy3+ from E-Waste Using Adsorbents from Spent Tyre Rubbers: Batch and Column Dynamic Assays. In: Molecules, 2025, vol. 30(1), article 92. https://doi.org/10.3390/molecules30010092
dc.identifier.doi10.3390/molecules30010092
dc.identifier.eissn1420-3049
dc.identifier.urihttp://hdl.handle.net/10400.9/5642
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
dc.relationTyre4REECycle - Recovery of Rare Earth Elements from NdFeB Magnets by Using Porous Carbons Produced from Rubber of Spent Tyres
dc.relation.hasversionhttps://www.mdpi.com/1420-3049/30/1/92
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectRare earth elements
dc.subjectRubber tyre
dc.subjectPlastics
dc.subjectPyrolysis
dc.subjectAdsorption
dc.subjectWaste valorization
dc.subjectCircular economy
dc.titleRecovery of Nd3+ and Dy3+ from E-Waste Using Adsorbents from Spent Tyre Rubbers: Batch and Column Dynamic Assayseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAssociated Laboratory for Green Chemistry - Clean Technologies and Processes
oaire.awardTitleTyre4REECycle - Recovery of Rare Earth Elements from NdFeB Magnets by Using Porous Carbons Produced from Rubber of Spent Tyres
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FQUI%2F50006%2F2019/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F147601%2F2019/PT
oaire.citation.issue1
oaire.citation.titleMolecules
oaire.citation.volume30
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamOE
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameBernardo
person.familyNamePinto
person.familyNameLapa
person.givenNameMaria
person.givenNameFilomena
person.givenNameNuno
person.identifier90528
person.identifier.ciencia-id1E11-A847-44DA
person.identifier.ciencia-id5A14-EADB-672D
person.identifier.orcid0000-0002-5823-6636
person.identifier.orcid0000-0002-1014-568X
person.identifier.orcid0000-0001-7862-7477
person.identifier.ridB-5187-2015
person.identifier.ridK-8456-2013
person.identifier.scopus-author-id22933828300
person.identifier.scopus-author-id7102740188
person.identifier.scopus-author-id6602694802
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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