Natural uranium isotopes and 226Ra in surface and groundwater from a basin of a semiarid region in Brazil
Autor: | Romilton dos Santos Amaral, Lino Angel Valcárcel Rojas, Zahily Herrero Fernández, José Araújo dos Santos Júnior, Josineide Marques do Nascimento Santos, José Antonio Corcho Alvarado, Marvic Ortueta Milan, Stefan Röllin |
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Rok vydání: | 2020 |
Předmět: |
Activity ratios
Isotope Health Toxicology and Mutagenesis Water source Public Health Environmental and Occupational Health chemistry.chemical_element Natural uranium Structural basin Uranium 010403 inorganic & nuclear chemistry 01 natural sciences Pollution 0104 chemical sciences Analytical Chemistry Radium Nuclear Energy and Engineering chemistry Environmental chemistry Environmental science Radiology Nuclear Medicine and imaging Spectroscopy Groundwater |
Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 326:1081-1089 |
ISSN: | 1588-2780 0236-5731 |
Popis: | 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 for 234U, 235U and 238U, respectively. Uranium radioisotopes account for the higher radioactivity in surface and groundwater, 226Ra was found only in few groundwater samples (0.09–0.61 Bq L− 1). 226Ra/238U (0.15–0.43) and 234U/238U (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. |
Databáze: | OpenAIRE |
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