Synthesis and characterization of cobalt nanoparticles for application in the removal of textile dye

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dc.creatorJean Castro da Cruz
dc.creatorMayra Aparecida Nascimento
dc.creatorHéryca Alves Vieira do Amaral
dc.creatorDiego S. D. Lima
dc.creatorAna Paula de Carvalho Teixeira
dc.creatorRenata Pereira Lopes
dc.date.accessioned2023-07-25T19:02:14Z
dc.date.accessioned2025-09-08T23:55:54Z
dc.date.available2023-07-25T19:02:14Z
dc.date.issued2019
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.identifier.doihttps://doi.org/10.1016/j.jenvman.2019.04.059
dc.identifier.issn0301-4797
dc.identifier.urihttps://hdl.handle.net/1843/56968
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Environmental Management
dc.rightsAcesso Restrito
dc.subjectNanopartículas
dc.subjectÁgua - Reutilização
dc.subjectMateriais nanoestruturados
dc.subjectRaios X - Difração
dc.subjectRaman, Espectroscopia de
dc.subjectEspectrometria de massa
dc.subjectNitrogenio - Absorção e adsorção
dc.subjectTermogravimetria
dc.subject.otherMagnetic nanoparticles
dc.subject.otherReal wastewater
dc.subject.otherNanomaterials
dc.titleSynthesis and characterization of cobalt nanoparticles for application in the removal of textile dye
dc.typeArtigo de periódico
local.citation.epage228
local.citation.spage220
local.citation.volume242
local.description.resumoIn this work, magnetic cobalt nanoparticles (CoNPs) were synthesized and applied to the removal of Remazol golden yellow RNL (RGY) from aqueous solutions and textile wastewater. The CoNPs were characterized and the Co content found in the CoNPs was 60.38% (m/m). The analysis of X-ray Diffraction (XRD) and Raman Spectroscopy indicated the presence of Co0 and CoO in the composition of the material, as confirmed by Thermogravimetric Analysis coupled to Mass Spectrometry (TG-MS). Images obtained by the Transmission Electron Microscope (TEM) showed that the CoNPs have sizes smaller than 10 nm, sphere morphology and high agglomeration capacity. The results obtained by nitrogen adsorption-desorption suggested that the nanomaterial presented a mesoporous characteristic, low specific surface area (15.70 m2 g−1) and a pore volume and pore diameter of 0.072 cm3 g−1 and 3.64 nm, respectively. CoNPs removed the RGY with high efficiency, reaching almost 100% removal in 30 min. The kinetic results showed that the reaction followed pseudo-second-order kinetics. Additionally, the removal process can be altered depending on the experimental condition. For instance, under acidic conditions, the reductive degradation prevailed, while in neutral or basic conditions, two simultaneous processes occur: reductive degradation and adsorption. Finally, CoNPs were applied to textile wastewater. The results showed high discoloration, reaching almost 88%. However, there was only a 32% decrease in chemical oxygen demand, showing that CoNPs are efficient at removing organic dyes from aqueous solutions.
local.identifier.orcidhttps://orcid.org/0000-0001-9428-4304
local.identifier.orcidhttps://orcid.org/0000-0002-3867-3257
local.identifier.orcidhttps://orcid.org/0000-0003-1049-8300
local.identifier.orcidhttps://orcid.org/0000-0002-4985-7502
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0301479719305262

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