在模拟处置条件下,采用北山地下水,用批式实验法研究了99Tc在内蒙古高庙子膨润土中的吸附行为,探讨了温度、液固比、pH、黄铁矿(FeS2)、磁铁矿(Fe3O4)黄铜矿(CuFeS2)、方铅矿(PbS)、稀土赤铁矿(Fe2O3),以及CO32-、SO42-、Fe2+、Fe3+等对吸附行为的影响。并采用背对背扩散实验方法测定了99Tc在膨润土的表观扩散系数,研究了石英砂、铁氧化物等添加剂对扩散行 Under simulated conditions, the Beishan groundwater was used to study the adsorption behavior of 99Tc in bentonite from Gaomiaozi, Inner Mongolia. The effects of temperature, liquid-solid ratio, pH, pyrite (FeS2), magnetite Fe3O4, CuFeS2, PbS, Fe2O3, and CO32-, SO42-, Fe2 +, Fe3 + on the adsorption behavior. The apparent diffusion coefficient of 99Tc in bentonite was determined by back-to-back diffusion method. The effects of additives such as quartz sand and iron oxide on the diffusion of