Brazilian clays for environmental solutions applied to radioactive waste management

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dc.contributor.authorMACHADO, G.G.pt_BR
dc.contributor.authorKRUPSKAYA, V.V.pt_BR
dc.contributor.authorZAKUSIN, S.V.pt_BR
dc.contributor.authorHARADA, J.pt_BR
dc.contributor.authorVICENTE, R.pt_BR
dc.contributor.authorSOUZA, R.P.pt_BR
dc.contributor.authorARAUJO, L.G.pt_BR
dc.contributor.authorMONTALVAN, E.T.pt_BR
dc.contributor.authorESPINOSA, D.C.R.pt_BR
dc.contributor.authorKAHN, H.pt_BR
dc.contributor.authorGUILHEN, S.N.pt_BR
dc.coverageNacionalpt_BR
dc.date.accessioned2021-08-05T18:51:06Z
dc.date.available2021-08-05T18:51:06Z
dc.date.issued2021pt_BR
dc.description.abstractClayey materials have been adopted in most nuclear waste producing countries as a key constituent in engineered barrier systems for final disposal facilities at all levels of radioactive wastes (LILW-SL, LILW-LL, and HLW). The following study presents a thorough characterization upon five Brazilian clay-rich deposits, mostly smectite bearing clays, aiming to evaluate their expected performance as barrier under the conditions associated to a Low and Intermediate Level Waste Repository; being the former a matter of national strategic interest. Samples coming from the Brazilian states of Paraná, Bahia, Paraíba, and Maranhão were treated and analyzed by means of X-Ray diffraction as main technique. Other techniques such as FTIR, LALLS, XRF, and SEM-EDS, were performed in order to establish the mineralogical composition, particle size distribution, and chemical composition. Moreover, several standard clay treatments over the <1 μm size fraction were carried out to reveal information regarding layer charge, major interlayer cations, unit formula and other crystal features of smectite species present in a mineralogical assembly, aiming to provide information for the construction of a molecular model over which would be realistic to simulate the diffusion of radionuclides. Results obtained on 133Cs adsorption experiments indicate that mineralogical composition would probably be the single most influential factor controlling transport capacity of positively charged radionuclides in the current setup. The composition is especially expressed in terms of smectite contents, favoring montmorillonite rich materials containing majorly Na+ as compensating cation in interlayer position. All tested samples can be considered as suitable candidates to be used in the design of final destination storage for nuclear waste. Thus, efficiency on 133Cs adsorption trials also indicate that these materials could have potential uses as sorptive matrices (Sorbents) for water treatment of radionuclide polluted waters such as TENORM waste waters. However, these trends are yet to be contrasted against hydraulic conductivity measurements and swelling pressure in order to have a more comprehensive perspective of this clayey prospects as barrier enhanced layer; aligned to the multilayer barrier system approach for nuclear waste management.pt_BR
dc.format.extent1-14pt_BR
dc.identifier.citationMACHADO, G.G.; KRUPSKAYA, V.V.; ZAKUSIN, S.V.; HARADA, J.; VICENTE, R.; SOUZA, R.P.; ARAUJO, L.G.; MONTALVAN, E.T.; ESPINOSA, D.C.R.; KAHN, H.; GUILHEN, S.N. Brazilian clays for environmental solutions applied to radioactive waste management. <b>Brazilian Journal of Radiation Sciences</b>, v. 9, n. 1A, p. 1-14, 2021. DOI: <a href="https://dx.doi.org/10.15392/bjrs.v9i1A.1539">10.15392/bjrs.v9i1A.1539</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/32137.
dc.identifier.doi10.15392/bjrs.v9i1A.1539pt_BR
dc.identifier.fasciculo1Apt_BR
dc.identifier.issn2319-0612pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-2604-1225
dc.identifier.percentilfiSem Percentilpt_BR
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/32137
dc.identifier.vol9pt_BR
dc.relation.ispartofBrazilian Journal of Radiation Sciencespt_BR
dc.rightsopenAccesspt_BR
dc.sourceMeeting on Nuclear Applications (ENAN), 14th, October 21-25, 2019, Santos, SPpt_BR
dc.subjectradioactive waste storage
dc.subjectfourier transformation
dc.subjectinfrared spectra
dc.subjectcesium 133
dc.subjectclays
dc.titleBrazilian clays for environmental solutions applied to radioactive waste managementpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorLEANDRO GOULART DE ARAUJO
ipen.autorSABINE NEUSATZ GUILHEN
ipen.autorROBERTO VICENTE
ipen.codigoautor10132
ipen.codigoautor5931
ipen.codigoautor1404
ipen.contributor.ipenauthorLEANDRO GOULART DE ARAUJO
ipen.contributor.ipenauthorSABINE NEUSATZ GUILHEN
ipen.contributor.ipenauthorROBERTO VICENTE
ipen.date.recebimento21-08
ipen.identifier.fiSem F.I.pt_BR
ipen.identifier.ipendoc27907pt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationa0d4f881-138c-4443-9866-dc80ec84a861
relation.isAuthorOfPublicationc3932232-0001-4122-bc0e-9109d11f8bec
relation.isAuthorOfPublication3a51edd6-4176-480f-8a75-2759d5428fc3
relation.isAuthorOfPublication.latestForDiscovery3a51edd6-4176-480f-8a75-2759d5428fc3
sigepi.autor.atividadeGUILHEN, S.N.:5931:510:Npt_BR
sigepi.autor.atividadeARAUJO, L.G.:10132:1120:Npt_BR
sigepi.autor.atividadeVICENTE, R.:1404:1120:Npt_BR
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