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dc.contributor.author
Montes, María Luciana
dc.contributor.author
Mercader, Roberto Carlos
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Barral, U. M.
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Silva, A. C.
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Fabris, José Domingos
dc.contributor.author
Taylor, Marcela Andrea
dc.date.available
2021-04-12T13:56:24Z
dc.date.issued
2019-09
dc.identifier.citation
Montes, María Luciana; Mercader, Roberto Carlos; Barral, U. M.; Silva, A. C.; Fabris, José Domingos; et al.; Natural and anthropogenic gamma-ray emitters and iron-bearing compounds distribution in peatlands of the southern Espinhaço mountain chain, Brazil; Springer; Environmental Earth Sciences; 78; 573; 9-2019; 1-10
dc.identifier.issn
1866-6280
dc.identifier.uri
http://hdl.handle.net/11336/129834
dc.description.abstract
To help understand the dynamics of peatlands forming on the Southern Serra do Espinhaço, Brazil, the occurring natural (226Ra, 232Th, 40K) and anthropogenic (137Cs) activity of gamma-ray emitters located at three sites, namely the localities of São João da Chapada (CH), Pinheiro (PIN) and Pau de Fruta (PDF), was studied. The iron compounds were characterized by 57Fe Mössbauer spectroscopy. Differences on natural radionuclide levels and distributions were found among the peatland sites, indicating differences on mineral composition, hydric regimes and living. Significant correlation was found only for 232Th?226Ra activity values (Pearson correlation coefficient of − 0.5), which is different from other South American soils, where significant positive correlations among all radionuclides were determined. In PDF and CH, the dose rate results are lower than the worldwide mean value, but in PIN, they are higher because of the relatively high 226Ra concentration. The only anthropogenic radionuclide is 137Cs. The convection?diffusion model fits the CH and PDF activity profiles, although the PIN profile is likely affected by other soil mechanisms as well. Mössbauer spectra reveal Fe3+ in two different local environments and the occurrence of hematite in the upper samples of the CH site. The iron concentration decreases with depth. Contrary to soils of other regions, no significant correlation was found between iron species and the natural radioactivity. The studied peatlands exhibit clear differences between their natural and anthropogenic radionuclide distributions to those of mineral soils.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
PEATLANDS
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RADIOACTIVITY
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Fe PROFILES
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MÖSSBAUER SPECTROSCOPY
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Ciencias Medioambientales
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Natural and anthropogenic gamma-ray emitters and iron-bearing compounds distribution in peatlands of the southern Espinhaço mountain chain, Brazil
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-27T18:19:46Z
dc.journal.volume
78
dc.journal.number
573
dc.journal.pagination
1-10
dc.journal.pais
Alemania
dc.description.fil
Fil: Montes, María Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
dc.description.fil
Fil: Mercader, Roberto Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
dc.description.fil
Fil: Barral, U. M.. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil
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Fil: Silva, A. C.. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil
dc.description.fil
Fil: Fabris, José Domingos. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil
dc.description.fil
Fil: Taylor, Marcela Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina
dc.journal.title
Environmental Earth Sciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s12665-019-8587-3
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1007/s12665-019-8587-3
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