Adsorption isotherms for the removal of Am-241 in radioactive liquid wastes using magnetite nanoparticles

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dc.contributor.authorOSHIRO, MAURICIO T.
dc.contributor.authorSAKATA, SOLANGE K.
dc.contributor.authorPOTIENS JUNIOR, ADEMAR J.
dc.coverageInternacionalpt_BR
dc.creator.eventoPAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1stpt_BR
dc.date.accessioned2018-08-13T17:44:26Z
dc.date.available2018-08-13T17:44:26Z
dc.date.evento27-30 de novembro, 2017pt_BR
dc.description.abstractAmericium-241 (Am-241) is a radionuclide with half-life of 432 years, emitting alpha particles and low gamma energy and it is also considered radiotoxic. Am-241 is produced, in a low level, from nuclear fuel and laboratory wastes. Magnetite nanoparticles (Fe3O4) are iron oxides that possess highly magnetic properties, and its application for removal of water contaminants refers due to its high surface area which allows the adsorption capability and the facility to be prepared and removed from the aqueous medium. In This study, magnetite was synthesized by coprecipitation method largely described. Batch experiments were accomplished at room temperature, at pH 6 and the contacts varying from 2.5, 5, 10, 20, 30, 40, 50, 60 minutes and at 30 minutes for the isotherms experiments. The solid containing magnetite and Am-241 were removed with a magnet and the solution analyzed in a gamma-ray spectrometer (Canberra Model GX2518) which could be quantified. Results show that magnetite possess a capability of removal up to 80% of Am-241 at room temperature, indicating that magnetite nanoparticles are a good sorbent for the removal of radionuclides. Langmuir and Freundlich Isotherms models were investigated and the parameters obtained. Langmuir’s isotherm showed constants of KL (75.7575 L/mg), Q (0.1617 mg/g) and R2 (0.9892) and Freundlich’s isotherm exhibited values of KF (2.6416 [(mg/g).(L/mg)1/n]), 1/n (0.7853 mg/g) and R2 (0.8395), which indicates that the Am- 241 removal from magnetite fits more suitable the Langmuir isotherm model. The thermodynamics parameters, such as the enthalpy and entropy of adsorption, the activation energy, as well as, the kinetics studies are under development.pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipIDFAPESP: 17/20177-3pt_BR
dc.event.siglaPANNANOpt_BR
dc.identifier.citationOSHIRO, MAURICIO T.; SAKATA, SOLANGE K.; POTIENS JUNIOR, ADEMAR J. Adsorption isotherms for the removal of Am-241 in radioactive liquid wastes using magnetite nanoparticles. In: PAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1st, 27-30 de novembro, 2017, Guarujá, SP. <b>Abstract...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/29047.
dc.identifier.orcidhttps://orcid.org/0000-0001-6072-5853
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29047
dc.local.eventoGuarujá, SPpt_BR
dc.rightsopenAccesspt_BR
dc.titleAdsorption isotherms for the removal of Am-241 in radioactive liquid wastes using magnetite nanoparticlespt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorMAURICIO TIOKAZU OSHIRO
ipen.autorADEMAR JOSE POTIENS JUNIOR
ipen.autorSOLANGE KAZUMI SAKATA
ipen.codigoautor10884
ipen.codigoautor734
ipen.codigoautor7038
ipen.contributor.ipenauthorMAURICIO TIOKAZU OSHIRO
ipen.contributor.ipenauthorADEMAR JOSE POTIENS JUNIOR
ipen.contributor.ipenauthorSOLANGE KAZUMI SAKATA
ipen.date.recebimento18-08pt_BR
ipen.event.datapadronizada2017pt_BR
ipen.identifier.ipendoc24839pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublication7e144a6c-a81d-407b-bda5-134157178030
relation.isAuthorOfPublication9426362d-f495-4433-9b46-c4ecc014a459
relation.isAuthorOfPublicationfb62f288-104d-4352-aed0-a18e0da21a1b
relation.isAuthorOfPublication.latestForDiscovery7e144a6c-a81d-407b-bda5-134157178030
sigepi.autor.atividadeOSHIRO, MAURICIO T.:10884:-1:Spt_BR
sigepi.autor.atividadeSAKATA, SOLANGE K.:7038:220:Npt_BR
sigepi.autor.atividadePOTIENS JUNIOR, ADEMAR J.:734:1120:Npt_BR
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