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Type: Artigo de periódico
Title: Anthropogenic Source Assessment Of 226ra And 210pb In A Sediment Core From The Cubatão River Estuary (se Brazil)
Author: Sanders L.M.
Sanders C.J.
Luiz-Silva W.
MacHado W.
Silva-Filho E.V.
Patchineelam S.R.
Abstract: A sediment core from an estuarine area receiving drainage from the highly industrialized Cubatão River basin (SE Brazil) showed 226Ra and 210Pb activities up to 80 and 213 Bq kg-1, respectively, which are greater than activities considered as regional background levels. Radionuclides and the elevated phosphorus concentrations (up to 0.3% sediment dry weight) found along the sediment core were significantly correlated with each other, indicating source similarity. These results indicate that 226Ra and 210Pb activities are affected by fertilizer industry-derived inputs in addition to natural sources. This interpretation was supported by 210Pb/226Ra ratios (found to be between 2.6 and 3.9) that indicate disequilibrium between 226Ra and its decay product 210Pb, as expected for phosphogypsum-affected sediments. © 2010 Akadémiai Kiadó, Budapest, Hungary.
Rights: fechado
Identifier DOI: 10.1007/s10967-010-0813-0
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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