Transport and sorption of 85Sr and 125I in crushed crystalline rocks under dynamic flow conditions



Transport and sorption of water-soluble 85Sr2+ and 125I in the columns with beds of crushed crystalline rocks from synthetic groundwater has been studied under dynamic flow conditions. Samples of crystalline rocks: diorite-I, diorite-II, gabbro, granite and tonalite, having the grain size between 0.25 and 0.80 mm, were used. Plastic syringes of 8.8 cm length and 2.1 cm in diameter were applied as columns. The synthetic groundwater was pumped downward through the columns with a seepage velocity of about 0.2 cm/min and the given radioactive nuclide was added into the water stream individually in a form of a short pulse. In case of 85Sr, desorption from diorite-I was also studied using an artificial acid rainfall and then, the longitudinal distribution of the residual 85Sr activity along the bed was measured. Retardation, distribution and hydrodynamic dispersion coefficients were determined by the evaluation of respective breakthrough curves. A corrected integral form of a simple advection–dispersion equation was derived and used for fitting the experimental data. The K d-parameters resulting from dynamic experiments were also compared with the results of static sorption experiments.


Radionuclide Sorption Transport Rock Column 



This research was carried out under contract 104/06/1583 with the Czech Science Foundation, and under contract No. ME 927 and No. MSM 6840770020 with the Ministry of Education, Youth and Sport of the Czech Republic. The financial support is greatly acknowledged.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  1. 1.Waste Disposal Department, Nuclear Power and Safety DivisionNuclear Research Institute Řež plcHusinec-ŘežCzech Republic
  2. 2.Department of Nuclear Chemistry, Faculty of Nuclear Sciences and Physical EngineeringCzech Technical UniversityPragueCzech Republic

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