Chemical characterization of the clay deposit known as peruvian black mud

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dc.contributor.authorALVES, I.C.
dc.contributor.authorGOUVEA, P.F.M.
dc.contributor.authorSILVA, P.S.C.
dc.coverageInternacionalpt_BR
dc.creator.evento60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORSpt_BR
dc.date.accessioned2018-03-14T17:54:38Z
dc.date.available2018-03-14T17:54:38Z
dc.date.eventoNovember 28 - December 01, 2017pt_BR
dc.description.abstractIn Peruíbe city, state of São Paulo, the largest continuous natural deposit of clay in the world can be found, containing of a material popularly known as Peruíbe Black Mud (PBM). This deposit has 83 thousand tons with a depth of 75m, distributed in 5 hectares, making the municipality a tourist point. This sludge is characterized by large amounts of fine particles, high organic matter content, high sulfite reducing bacteria content and a consequent high ion reduction potential; it is used in psoriasis, peripheral dermatitis, acne and seborrhea treatments, as well as in myalgias, arthritis and non-rheumatic joint processes. Ten samples of the in natura mud were collected along the deposit, in depth ranging from 1 to 1.5m and also 6 samples that were matured with see water, with the objective of verifying the homogeneity of the chemical composition through the evaluation of its elemental content, for the physical-chemical characterization, measurements of pH, moisture, organic matter and loss on ignition were made. The elemental concentrations were determined by neutron activation analysis. In these measurements approximately 100mg of sample were irradiated together with certified reference materials, for a period of 8 hours under a neutron flux in the order of 1012 n cm􀀀2 s􀀀1. The activities were determined by gamma spectrometry using high-purity Ge detectors. Both, in natura and maturated samples presented similar coefficient of variation for most of the elements, with Ca, Co, Cr, Cs, Fe, La, Th and U having a coefficient of variation lower than 30%, the elements As, Sm, Tb, Zn and Zr presented a coefficient of variation between 30 and 60% and the elements K, Nd, Sb, Se, Tb and Yb presented the highest coefficients of variation, above 60%.pt_BR
dc.format.extent28-29pt_BR
dc.identifier.citationALVES, I.C.; GOUVEA, P.F.M.; SILVA, P.S.C. Chemical characterization of the clay deposit known as peruvian black mud. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. <b>Abstract...</b> São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 28-29. Disponível em: http://repositorio.ipen.br/handle/123456789/28723.
dc.identifier.orcidhttps://orcid.org/0000-0002-9351-9201
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/28723
dc.localSão Paulo, SPpt_BR
dc.local.eventoSão Paulo, SPpt_BR
dc.publisherInstituto de Pesquisas Energéticas e Nuclearespt_BR
dc.rightsopenAccesspt_BR
dc.titleChemical characterization of the clay deposit known as peruvian black mudpt_BR
dc.typeResumo de eventos científicospt_BR
dspace.entity.typePublication
ipen.autorPAULO FLAVIO DE MACEDO GOUVEA
ipen.autorPAULO SERGIO CARDOSO DA SILVA
ipen.autorISIS CAMPOS ALVES
ipen.codigoautor11267
ipen.codigoautor2777
ipen.codigoautor14438
ipen.contributor.ipenauthorPAULO FLAVIO DE MACEDO GOUVEA
ipen.contributor.ipenauthorPAULO SERGIO CARDOSO DA SILVA
ipen.contributor.ipenauthorISIS CAMPOS ALVES
ipen.date.recebimento18-03pt_BR
ipen.event.datapadronizada2017pt_BR
ipen.identifier.ipendoc24545pt_BR
ipen.notas.internasAbstractpt_BR
ipen.type.genreResumo
relation.isAuthorOfPublicationb55d859a-1c66-473f-9761-e29ee13b7449
relation.isAuthorOfPublicationaa898df6-ea14-482c-bc29-b45954bb0542
relation.isAuthorOfPublication729c593c-ceb0-4c59-8abb-76c0ef4bfc5b
relation.isAuthorOfPublication.latestForDiscovery729c593c-ceb0-4c59-8abb-76c0ef4bfc5b
sigepi.autor.atividadeALVES, I.C.:14438:-1:Spt_BR
sigepi.autor.atividadeGOUVEA, P.F.M.:11267:320:Npt_BR
sigepi.autor.atividadeSILVA, P.S.C.:2777:320:Npt_BR
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