Cr(VI) reduction and adsorption by bimetallic nanoparticles from li-ion batteries

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dc.creatorSthefany dos Santos Sena
dc.creatorJean Castro da Cruz
dc.creatorAna Paula de Carvalho Teixeira
dc.creatorRenata Pereira Lopes
dc.date.accessioned2023-07-26T12:13:52Z
dc.date.accessioned2025-09-09T00:00:10Z
dc.date.available2023-07-26T12:13:52Z
dc.date.issued2020
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.1007/s11356-020-10003-y
dc.identifier.issn0944-1344
dc.identifier.urihttps://hdl.handle.net/1843/56988
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofEnvironmental Science and Pollution Research
dc.rightsAcesso Restrito
dc.subjectNanopartículas
dc.subjectAdsorção
dc.subjectCromo
dc.subjectRaios X - Difração
dc.subject.otherNanoparticles
dc.subject.otherChromium
dc.subject.otherAdsorption
dc.titleCr(VI) reduction and adsorption by bimetallic nanoparticles from li-ion batteries
dc.typeArtigo de periódico
local.citation.epage39221
local.citation.spage39211
local.citation.volume27
local.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.
local.identifier.orcidhttps://orcid.org/0000-0002-4985-7502
local.identifier.orcidhttps://orcid.org/0000-0001-9428-4304
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://link.springer.com/article/10.1007/s11356-020-10003-y

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