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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/56988
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dc.creatorSthefany dos Santos Senapt_BR
dc.creatorJean Castro da Cruzpt_BR
dc.creatorAna Paula de Carvalho Teixeirapt_BR
dc.creatorRenata Pereira Lopespt_BR
dc.date.accessioned2023-07-26T12:13:52Z-
dc.date.available2023-07-26T12:13:52Z-
dc.date.issued2020-
dc.citation.volume27pt_BR
dc.citation.spage39211pt_BR
dc.citation.epage39221pt_BR
dc.identifier.doihttps://doi.org/10.1007/s11356-020-10003-ypt_BR
dc.identifier.issn0944-1344pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/56988-
dc.description.resumoIn this work, bimetallic nanoparticles of cobalt and copper (NPLIB) were synthetized from obsolete Li-ion batteries cellphones and applied for the first time in the Cr(VI) removal. NPLIB has approximately 50 and 40% of Co and Cu content, respectively. The material is composed of Cu0 and Co0 but also presents metal oxides on its surface. The nanoparticles have spherical morphology and a high agglomeration capacity. The cobalt was better distributed on the surface, while copper was present in small scattered clusters. The NPLIB have an average diameter of 13.5 nm being confirmed the formation of the core-shell structure. The point of zero charge was calculated as 8.3. The NPLIB were used in the Cr(VI) removal process in aqueous solution, exhibiting a removal efficiency of ≈ 90% in 60 min of reaction. The kinetics study showed a mechanism consisting of two phases and better fit by pseudo-second-order model. The first phase is faster than the second. It is possible to observe peaks related to the oxidation of Co and Cu in the post reaction NPLIB by X-ray diffraction analysis, suggesting the modification of the material. Raman spectroscopy has shown that Cr(VI) is reduced to Cr(III) and remains bound to the surface of the nanoparticle, even after the desorption process, reducing its removal efficiency in new cycles.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.description.sponsorshipOutra Agênciapt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofEnvironmental Science and Pollution Researchpt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectNanoparticlespt_BR
dc.subjectChromiumpt_BR
dc.subjectAdsorptionpt_BR
dc.subject.otherNanopartículaspt_BR
dc.subject.otherAdsorçãopt_BR
dc.subject.otherCromopt_BR
dc.subject.otherRaios X - Difraçãopt_BR
dc.titleCr(VI) reduction and adsorption by bimetallic nanoparticles from li-ion batteriespt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://link.springer.com/article/10.1007/s11356-020-10003-ypt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4985-7502pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-9428-4304pt_BR
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