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Baseline and Quality Reference Values for Natural Radionuclides in Soils of Rio de Janeiro State, Brazil Rev. Bras. Ciênc. Solo
Ribeiro,Fernando Carlos Araujo; Lauria,Dejanira da Costa; Silva,José Ivan Rodrigues; Lima,Erica Souto Abreu; Amaral Sobrinho,Nelson Moura Brasil do; Pérez,Daniel Vidal.
ABSTRACT A first large-scale systematic survey of natural radioactivity contents of soils of the state of Rio de Janeiro is presented, focused on the establishment of Quality Reference Values (QRVs). Undisturbed soil samples were collected from 243 areas and analyzed by gamma spectrometry. The activity contents varied largely, ranging from 12.2 to 1,029 Bq kg−1 for 40K (geometric mean of 111.1 Bq kg−1), from 3.5 to 99.8 Bq kg−1 for 226Ra (geometric mean of 29.7 Bq kg−1), and from 5.4 to 314.5 Bq kg−1 for 228Ra (geometric mean of 67.1 Bq kg−1). The highest contents of radium isotopes were found in soils developed on igneous rocks (Leptosol), and the lowest in a soil of sedimentary origin (Podzol). Among the different soil types, the radioisotope contents...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Radium; Potassium-40; Quality reference values; Soil.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100500
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Study of the phytoplankton plume dynamics off the Crozet Islands (Southern Ocean): A geochemical-physical coupled approach ArchiMer
Sanial, Virginie; Van Beek, Pieter; Lansard, Bruno; D'Ovidio, Francesco; Kestenare, Elodie; Souhaut, Marc; Zhou, Meng; Blain, Stephane.
Study of the natural iron fertilization in the Southern Ocean Combined geochemical-physical approach to investigate the exchange rates of waters
Tipo: Text Palavras-chave: Southern Ocean; Crozet Islands; Iron fertilization; Radium; Altimetry; GEOTRACES.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00226/33749/32162.pdf
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