Evaluation of the sedimentation rate in a sediment profile of Bortolan Dam - MG, Brazil

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dc.contributor.authorALMEIDA, HELEINE C. de
dc.contributor.authorSOARES, FLAVIO V.T.S.
dc.contributor.authorTADDEI, MARIA H.T.
dc.contributor.authorMAZZILLI, BARBARA P.
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCEpt_BR
dc.date.accessioned2018-01-09T16:13:23Z
dc.date.available2018-01-09T16:13:23Z
dc.date.eventoOctober 22-27, 2017pt_BR
dc.description.abstractVolcanic extrusion is one of the main causes for the high levels of environmental radioactivity in the region of Poços de Caldas (MG, Brazil). Uranium mining during the 80’s further increased the background radiation in the region, especially in the Ribeirão das Antas watershed, where Bortolan Dam is located. Besides the uranium mining facility operating in the region, other activities, such as agriculture, were also responsible for the enhancement of the levels of radioactivity. The dam sediment profile provides an appropriate compartment for the study of the temporal variation of these radionuclides and for the evaluation of anthropogenic contamination. The main aim of this study is to evaluate the sedimentation rate and the dating of a profile collected in Bortolan Dam, by using the geochronology method. The activity concentration of 226Ra and 210Pb were measured in the sediment profile by gamma spectrometry. The concentration of 226Ra and 210Pb varied from (217 ± 9) Bq kg-1 to (286 ± 12) Bq kg-1 and from (262 ± 11) Bq kg-1 to (322 ± 34) Bq·kg-1 respectively; and the sedimentation rates varied from 0.021 to 0.144 g cm-2y-1.pt_BR
dc.event.siglaINACpt_BR
dc.identifier.citationALMEIDA, HELEINE C. de; SOARES, FLAVIO V.T.S.; TADDEI, MARIA H.T.; MAZZILLI, BARBARA P. Evaluation of the sedimentation rate in a sediment profile of Bortolan Dam - MG, Brazil. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. <b>Proceedings...</b> Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28263.
dc.identifier.orcidhttps://orcid.org/0000-0001-7174-9703
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/28263
dc.localRio de Janeiro, RJpt_BR
dc.local.eventoBelo Horizonte, MGpt_BR
dc.publisherAssociação Brasileira de Energia Nuclearpt_BR
dc.rightsopenAccesspt_BR
dc.subjectage estimation
dc.subjectconcentration ratio
dc.subjectdams
dc.subjectdensity
dc.subjecthumidity
dc.subjectlead 210
dc.subjectnatural radioactivity
dc.subjectradon 226
dc.subjectsedimentation
dc.titleEvaluation of the sedimentation rate in a sediment profile of Bortolan Dam - MG, Brazilpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorBARBARA PACI MAZZILLI
ipen.autorHELEINE CARDOSO DE ALMEIDA
ipen.codigoautor45
ipen.codigoautor14451
ipen.contributor.ipenauthorBARBARA PACI MAZZILLI
ipen.contributor.ipenauthorHELEINE CARDOSO DE ALMEIDA
ipen.date.recebimento18-01pt_BR
ipen.event.datapadronizada2017pt_BR
ipen.identifier.ipendoc24088pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication7e8b6143-512f-4b43-87a9-eb5ea497807f
relation.isAuthorOfPublicationeeb01f55-f5bb-49cf-bb32-c37cdfcae01d
relation.isAuthorOfPublication.latestForDiscoveryeeb01f55-f5bb-49cf-bb32-c37cdfcae01d
sigepi.autor.atividadeALMEIDA, HELEINE C. DE:14451:-1:Spt_BR
sigepi.autor.atividadeMAZZILLI, BARBARA P.:45:340:Npt_BR
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