Exhalation rates determined in construction material produced from niobium waste

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dc.contributor.authorSILVA, PAULO S.C. dapt_BR
dc.contributor.authorEL HAJJ, THAMMIRIS M.pt_BR
dc.contributor.authorDANTAS, G.A.S.A.pt_BR
dc.contributor.authorTORQUATO, HENRIQUEpt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCEpt_BR
dc.date.accessioned2019-11-29T19:14:47Z
dc.date.available2019-11-29T19:14:47Z
dc.date.eventoOctober 21-25, 2019pt_BR
dc.description.abstractMining operations annually generate large volumes of mining waste that can have several environmental impacts requiring appropriate management strategies in the short and long term. Recently, in Brazil, we have witnessed the catastrophic consequences of poor management of these tailings. One way to better manage mining waste may be to reduce its quantity by reusing it. In the case of niobium industry one possibility for the huge amount of solid tailing generated is its application as construction material. Nevertheless, these tailing also carries some radioactive elements. Exposure to radiation originated from construction material is mainly due to the presence of radionuclides from uranium and thorium series. The external exposure comes from the gamma emitters present in the material while internal exposure can come from radon and thoron gas. This study had evaluated the radiological impact of using niobium waste tailing in concrete plates and proof bodies, for use in construction material. It was determined the activity concentration of 238U, 226Ra, 210Pb, 232Th, 228Th, 228Ra and 40K in cement made with niobium waste to compare with commercial cement. Exhalation rates for 222Rn and 220Rn were determined for cement plates and proof bodies made with 0, 50 and 100% of niobium waste. Results showed that the exhalation rates varied from 0.032 ± 0.004 to 0.20 ± 0.01 Bq/m2.s for 222Rn and from 0.044 ± 0.005 to 0.8 ± 0.1 Bq/m2.s for 220Rn in the different cements. The exhalation rate of the plates varied from 0.035 ± 0.002 to 0.35 ± 0.02 Bq/m2.s for 222Rn and from 0.048 ± 0.006 to 1.2 ± 0.1 Bq/m2.s for 220Rn and the variation for the proof bodies was 0.0042 ± 0.0006 to 0.2 ± 0.1 Bq/m2.s and from 0.008 ± 0.001 to 0.054 ± 0.006 Bq/m2.s for 222Rn and 220Rn, respectively.pt_BR
dc.event.siglaINACpt_BR
dc.format.extent556-568pt_BR
dc.identifier.citationSILVA, PAULO S.C. da; EL HAJJ, THAMMIRIS M.; DANTAS, G.A.S.A.; TORQUATO, HENRIQUE. Exhalation rates determined in construction material produced from niobium waste. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. <b>Proceedings...</b> Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 556-568. Disponível em: http://repositorio.ipen.br/handle/123456789/30398.
dc.identifier.orcidhttps://orcid.org/0000-0002-9351-9201
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/30398
dc.localRio de Janeiropt_BR
dc.local.eventoSantos, SPpt_BR
dc.publisherAssociação Brasileira de Energia Nuclear
dc.rightsopenAccesspt_BR
dc.subjectbreath
dc.subjectbuilding materials
dc.subjectcements
dc.subjectconstruction
dc.subjectdose rates
dc.subjectexhalation
dc.subjectgamma spectroscopy
dc.subjectneutron activation analysis
dc.subjectniobium
dc.subjectpublic health
dc.subjectradon
dc.subjectstatistical data
dc.subjectthorium
dc.titleExhalation rates determined in construction material produced from niobium wastept_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorPAULO SERGIO CARDOSO DA SILVA
ipen.codigoautor2777
ipen.contributor.ipenauthorPAULO SERGIO CARDOSO DA SILVA
ipen.date.recebimento19-11
ipen.event.datapadronizada2019pt_BR
ipen.identifier.ipendoc26160pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublicationaa898df6-ea14-482c-bc29-b45954bb0542
relation.isAuthorOfPublication.latestForDiscoveryaa898df6-ea14-482c-bc29-b45954bb0542
sigepi.autor.atividadeSILVA, PAULO S.C. da:2777:320:Spt_BR
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