1. Natural uranium isotopes and 226Ra in surface and groundwater from a basin of a semiarid region in Brazil.
- Author
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Rojas, Lino Valcarcel, dos Santos Júnior, José Araújo, Alvarado, José Antonio Corcho, Milan, Marvic Ortueta, Röllin, Stefan, Amaral, Romilton Santos, Fernández, Zahily Herrero, and do Nascimento Santos, Josineide Marques
- Subjects
URANIUM isotopes ,ARID regions ,WATER table ,RADIOACTIVITY ,GROUNDWATER ,WATER ,GROUNDWATER sampling - Abstract
This research aimed to get information about the uranium and radium activity concentrations in surface and ground water in a semiarid region in Brazil. Mean (and range) activity of 0.46 (0.01–1.8), 0.015 (0.0004–0.066) and 0.32 (0.09–1.32) Bq L
− 1 were found for234 U,235 U and238 U, respectively. Uranium radioisotopes account for the higher radioactivity in surface and groundwater,226 Ra was found only in few groundwater samples (0.09–0.61 Bq L− 1 ).226 Ra/238 U (0.15–0.43) and234 U/238 U (1.18–1.86) activity ratios are indicative of radioactive disequilibrium in groundwater. Expected effective doses from few water sources can be considered significant if untreated water is used for drinking. [ABSTRACT FROM AUTHOR]- Published
- 2020
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