Thoron and radon activity concentration in mineral waters of spas from southeastern Brazil

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dc.contributor.authorSalim, Leonardo Alfredo [UNESP]
dc.contributor.authorBonotto, Daniel Marcos [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-10-22T06:47:20Z
dc.date.available2015-10-22T06:47:20Z
dc.date.issued2015-05-01
dc.description.abstractThis work presents results of the measurements of thoron (Rn-220) and radon (Rn-222) activity concentration in 23 mineral waters sources occurring at the cities of Aguas da Prata, Pocos de Caldas, Aguas de Lindoia, and Aguas de Sao Pedro that are spas located at Minas Gerais and Sao Paulo States, Brazil. Physico-chemical parameters and dissolved gases have been also reported to understand the circulation environment of the waters, which indicated that it varies from transitional to reducing conditions. The thoron and radon activity concentrations ranged from 0.01 to 0.93 Bq/L and from 0.06 to 104 Bq/L, respectively. According to the Brazilian Code for Mineral Waters, these activities indicated that none of them are thoriferous, whereas two are weakly radioactive. The highest Rn-220 and Rn-222 levels were found in sources located in Pocos de Caldas and Aguas da Prata cities, within the Pocos de Caldas alkaline complex. This massif is a well-known suite of alkaline volcanic and plutonic rocks that possesses an accumulation of U, Th, other natural radionuclides, and rare-earth elements. In Villela spring, Aguas da Prata city, Sao Paulo State, the radon activity concentration exceeded the maximum allowed value of 100 Bq/L in drinking water as proposed by WHO in 2009. Although this spring is not utilized in a regular public water-supply system, there are taps available in a park allowing the water consumption by population. However, it has not been observed any health impact on local people that would need action taken by the Government.en
dc.description.affiliationInstituto de Geociências e Ciências Exatas-IGCE, Universidade Estadual Paulista-UNESP, Av. 24-A No. 1515, P.O. Box 178, Rio Claro, São Paulo, CEP 13506-900, Brazil
dc.description.affiliationUnespInstituto de Geociências e Ciências Exatas-IGCE, Universidade Estadual Paulista-UNESP, Av. 24-A No. 1515, P.O. Box 178, Rio Claro, São Paulo, CEP 13506-900, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.format.extent5619-5630
dc.identifierhttp://link.springer.com/article/10.1007%2Fs12665-014-3816-2
dc.identifier.citationEnvironmental Earth Sciences. New York: Springer, v. 73, n. 9, p. 5619-5630, 2015.
dc.identifier.doi10.1007/s12665-014-3816-2
dc.identifier.issn1866-6280
dc.identifier.lattes7430102726026121
dc.identifier.urihttp://hdl.handle.net/11449/129772
dc.identifier.wosWOS:000353803600071
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofEnvironmental Earth Sciences
dc.relation.ispartofjcr1.435
dc.relation.ispartofsjr0,552
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectMineral watersen
dc.subjectSpasen
dc.subjectThoronen
dc.subjectRadonen
dc.titleThoron and radon activity concentration in mineral waters of spas from southeastern Brazilen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes7430102726026121
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Geociências e Ciências Exatas, Rio Claropt

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Artigos - Petrologia e Metalogenia - IGCE