Radon in underground waters as a natural analogue to study the escape of CO2 in geological repositories.
Activity concentrations of dissolved (222)Rn and (226)Ra were measured in several underground aquifers, which are candidates for repositories or for the study of analogue natural escapes of CO2. The concentration of both radionuclides in water was determined using liquid scintillation counting. The values obtained for the (222)Rn concentrations varied from 0 to 150 Bq l(-1), while the levels of (226)Ra were in general very low. This indicates that (222)Rn is coming from the decay of the undissolved (226)Ra existing in the rocks and deep layers of the aquifers, being later transported by diffusion in water.
Department of Physics, University of Extremadura, Badajoz 06006, Spain ams@unex.es.
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Martín Sánchez
Department of Physics, University of Extremadura, Badajoz 06006, Spain.
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Ruano Sánchez
Department of Physics, University of Extremadura, Badajoz 06006, Spain.
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de la Torre Pérez
Department of Physics, University of Extremadura, Badajoz 06006, Spain.
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Jurado Vargas
D001417:Background Radiation; D002245:Carbon Dioxide / Q000032:analysis* / Q000737:chemistry*; D004058:Diffusion; D060587:Groundwater / Q000032:analysis / Q000737:chemistry*; D007553:Isotope Labeling / Q000379:methods; D011834:Radiation Monitoring / Q000379:methods; D011850:Radioactive Waste; D011886:Radon / Q000032:analysis* / Q000737:chemistry*; D018505:Waste Management
D011850:Radioactive Waste; D002245:Carbon Dioxide; D011886:Radon