LABORATORY STUDIES OF NUCLIDES MIGRATION Ⅰ.SORPTION OF RADIOACTIVE STRONTIUM AND CESIUM ON GEOLOGIC MEDIA

This paper presents the results of the investigation of the sorption behaviorof radioactive strontium and cesium on eight types of rock samples collectedfrom different areas in China. A batch technique was used for sorption and desorption measurements andthe sorption ability of rock is described by sorption ratio (R_d). The resultsshow that sorption ratios for strontium on all rock samples investigated are low(2--60) while those for cesium on different rock samples are various. Among therock samples studied, the shale from Sichuan and the basalt from Hebei showhigh sorption ratios for cesium (2.7×10~3 and 1.2×10~3 respectively).