中文摘要：

核素迁移性是确定所选核废物处置库库址是否适宜的核心问题之一。阻滞因子凡可反映溶质运移过程受阻滞的特性。对近年来非饱和土壤中Rd值的一些研究进展进行了回顾与分析，提出了一些尚待解决的问题。

英文摘要：

Nuclide migration is one of the core problems to choose a suitable repository for nuclear waste repository site. Retardation coefficient Rd can reflect the solute transport characteristics. Rd in unsaturated soil was analyzed in detail and some related issues were presented.