中文摘要：

3H和Br-、3H和I-在饱和黄土中的迁移实验表明：3H的迁移速度均滞后于Br-和I-。以3H为基准核素,应用GROUND程序分别对Br-和I-在饱和黄土中的迁移进行了模拟,获得了各示踪剂在饱和黄土中的阻滞因子。结果显示,示踪剂3H、Br-和I-在饱和黄土中迁移时均存在滞留现象,其中Br-的滞留现象表现的最不明显,其次为I-,3H的滞留特性表现的最明显。核素的滞留特征直接影响到研究结果精度,在选择同位素作为示踪剂时,建议首先考虑选择Br-。

英文摘要：

A study was conducted on the migration of trace elements in saturated loess.The study shows that 3H migrates slower than Br-and I-in saturated loess.In this paper,the retardation factor of 3H is assumed as 1,the retardation factors of Br-and I-are simulated using GROUND program.The simulation results show that 3H,Br-and I-are retarded in saturated loess,and their migration velocity is 3HI-Br-.The retardation character of 3H,Br-and I-has significant impact on their migration in saturated loess.It suggests that Br-should be selected as tracer.