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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/56968
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dc.creatorJean Castro da Cruzpt_BR
dc.creatorMayra Aparecida Nascimentopt_BR
dc.creatorHéryca Alves Vieira do Amaralpt_BR
dc.creatorDiego S. D. Limapt_BR
dc.creatorAna Paula de Carvalho Teixeirapt_BR
dc.creatorRenata Pereira Lopespt_BR
dc.date.accessioned2023-07-25T19:02:14Z-
dc.date.available2023-07-25T19:02:14Z-
dc.date.issued2019-
dc.citation.volume242pt_BR
dc.citation.spage220pt_BR
dc.citation.epage228pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jenvman.2019.04.059pt_BR
dc.identifier.issn0301-4797pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/56968-
dc.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.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.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.ispartofJournal of Environmental Managementpt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectMagnetic nanoparticlespt_BR
dc.subjectReal wastewaterpt_BR
dc.subjectNanomaterialspt_BR
dc.subject.otherNanopartículaspt_BR
dc.subject.otherÁgua - Reutilizaçãopt_BR
dc.subject.otherMateriais nanoestruturadospt_BR
dc.subject.otherRaios X - Difraçãopt_BR
dc.subject.otherRaman, Espectroscopia dept_BR
dc.subject.otherEspectrometria de massapt_BR
dc.subject.otherNitrogenio - Absorção e adsorçãopt_BR
dc.subject.otherTermogravimetriapt_BR
dc.titleSynthesis and characterization of cobalt nanoparticles for application in the removal of textile dyept_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0301479719305262pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-9428-4304pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-3867-3257pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1049-8300pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4985-7502pt_BR
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