A study of interaction between shale rock and radionuclides in underground water

Investigation resutls of interactions between shale rock and radionuclides (strontium, cesium) in the underground water were reported. The results of radionuclides absorption in the filtrate on shale rock were also given. In the experiment, the technique of vibration at constant tempereture, tipping sample and direct-measuring the gamma activity of liquid were used. The results showed that the distribution coefficients of strontium and cesium in underground water on shale rock taken from different depth were 35 to 52 mL/g and 1672 to 8893 mL/g at constant temperature and normal pressure respectively. The sorption efficiencies of shale rock to the radionuclides in the filtrate were 67 to 78%. The static experiment method could give out the results in shorter period. So it could provide parameters for site selection and safety assessment of environment of shallow land or deep geological disposal of radioactive waste