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dc.contributor.authorConceicao, F. T.
dc.contributor.authorBonotto, Daniel Marcos [UNESP]
dc.date.accessioned2014-05-20T15:25:39Z
dc.date.available2014-05-20T15:25:39Z
dc.date.issued2003-07-01
dc.identifierhttp://dx.doi.org/10.1007/s00254-003-0775-4
dc.identifier.citationEnvironmental Geology. New York: Springer-verlag, v. 44, n. 4, p. 408-418, 2003.
dc.identifier.issn0943-0105
dc.identifier.urihttp://hdl.handle.net/11449/36014
dc.description.abstractThe U-disequilibrium method was utilized to evaluate the velocity of alteration of rocks and fertilizer-derived uranium in the Corumbatai River basin, São Paulo state, Brazil. The Corumbatai River basin is affected by the continuous use of fertilizer-derived uranium utilized in sugar cane crops, increasing the dissolved uranium concentration in the Corumbatai River (Santa Terezinha station) in the wet period to 43%. The weathering rate in the Corumbatai River basin utilizing the U-isotope modeling was 0.0265 mm/year (corresponding to 38,000 years to weather 1 m of rock under actual climatic conditions). However, when the inputs of anthropogenic uranium were considered, then a weathering rate of 0.022 mm/year (corresponding to 45,500 years to weather 1 m of rock) was determined. The removed material in the Corumbatai River basin is mainly from two sub-basins (the Cabecas River and Passa Cinco River), where the sandstones weather easier than the siltstones and claystones in the basin.en
dc.format.extent408-418
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofEnvironmental Geology
dc.sourceWeb of Science
dc.subjectweathering ratept
dc.subjecturaniumpt
dc.subjectphosphate and anthropogenic influencespt
dc.subjectBrazilpt
dc.titleUse of U-isotope disequilibrium to evaluate the weathering rate and fertilizer-derived uranium in São Paulo state, Brazilen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUniv Estadual Paulista Julio de Mesquita Filho, IGCE, BR-13506900 São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista Julio de Mesquita Filho, IGCE, BR-13506900 São Paulo, Brazil
dc.identifier.doi10.1007/s00254-003-0775-4
dc.identifier.wosWOS:000184074700005
dc.rights.accessRightsAcesso restrito
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Geociências e Ciências Exatas, Rio Claropt
dc.identifier.lattes7430102726026121
unesp.author.lattes7430102726026121
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