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| 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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