Abstract: INVESTIGATION OF SORPTION AND MIGRATION OF RADIOACTIVE STRONTIUM ON CLINOPTILOLITE AND MORDENITEYE MINGLU ;LU SHIJUN ;QIN CHUNKOU ;XU LIHONG ;HE ADI ;TANG ZHIHUA（Department of Nuclear Science ，Fudan University，Shanghai，200433） XU GUOQING ;FAN XUANLIN ;GU JIFANG ;DU ZHICHAO（Beijing Research Institute of Uranium Geology, 100029）ABSTRACT The behaviors of sorption and migration of radioactive strontium on clinoptilolite and mor-denite have been investigated by both batch technique and colunm experiment．The sorption ratios（ R_d）and sorption equilibrium time are determined．The effects of particle size of rock samples，liquid-solid ratios，pH values of simulated groundwater and concentration of strontium insimulated groundwater on sorption ratios of Sr are studied．The sorption capacity and sorptionisotherm of Sr are determined．The behaviors of sorption and migration of Sr in clinoptilolitecolumn are studied．The migration velocity of Sr is calculated. The results show that sorption abil-ities of clinoptilolite and mordenite for Sr are very strong. The R_d of Sr increases with the decreaseof particle size of rock samples，with the increase of liquid-solid ratios（ V／m）and with the in-crease of pH value of simulated groundwater．The R_d of Sr decreases with the increase of the con-centration of strontium in simulated groundwater. The migration velocity of Sr in the clinoptilolitecolumn is very small（about3．8×10~(-2)m／a）．So that，clinoptilolite and mordenite are ideal back-fill materials for Sr in nuclear waste disposal.Key words Nuclide migration Zeolites ~(90)Sr Sorption ratio