【摘要】 本文通过静态实验和动态实验 ,研究了85Sr、13 4Cs和60 Co在黄土中的吸附和迁移行为以及核素浓度、p H和温度对分配系数的影响。静态实验结果表明 ,16个样品测定的85Sr、13 4Cs和60 Co的分配系数的均值分别为 82、7.4× 10 3 和 5.4× 10 3 m L/g;p H值的变化对三种核素的分配系数有较大影响。动态实验结果表明 ,三种核素的绝大部分滞留在土柱中 ,只有少部分从土柱中流出来 ;三种核素在土柱中的迁移速度从快到慢的顺序为85Sr>13 4Cs≈60 Co更多还原

【Abstract】 Both batch experiment and column technique are used to investigate the sorption and migration behavior of radioactive 85 Sr, 134 Cs and 60 Co in loess medium. In addition, the effects of tracer concentration, pH value and temperature on distribution coefficient was also studied.It is indicated from batch experiment results that the average K d value of sixteen samples for 85 Sr, 134 Cs and 60 Co was 82, 7.4×10 3 and 5.4×10 3 mL/g, respectively. Distribution coefficients were greatly affected by pH. Results indicate most of these three radionuclides remain in loess, and only a small amount of radionuclide flowed out from the loess column. In the loess column, the order of migration distance of the three radionuclides are 85 Sr> 134 Cs≈ 60 Co. (更多还原