In this paper , the performance of adsorbing and retarding 125i ( substituted for 129i ) for mixed materials as buffer , backfill material was investigated , the distribution coefficient kds by batch sorption experiments were determined for four kinds of minerals and one kind of bentonite under atmosphere , iodine sorption and desorption on several mianerals were studied under low oxygen ambience at first time in the domestic , and apparent diffusion coefficient da of 125i ~ was determined for mixed minerals under atmosphere 在大气条件下用批式实验法研究了放射性125i - 、 125io3 - (用i - 125代替i - 129 )在黄铜矿、方铅矿、黄铁矿、辰砂上的吸附和解吸行为，并且在国内首次研究了低氧条件下碘在几种矿物上的吸附和解吸行为；在大气条件下，用恒定源扩散法研究了125i -在方铅矿与膨润土组成的混合材料中的扩散行为。
