|
|||||
|
|
| 3H在黄土中迁移的滞后特征 | |
| 引用本文： | 滕彦国,王金生,郭敏丽. 3H在黄土中迁移的滞后特征[J]. 中国环境科学, 2007, 27(3): 332-335 |
| 作者姓名： | 滕彦国 王金生 郭敏丽 |
| 作者单位： | 北京师范大学水科学研究院,水沙科学教育部重点实验室,北京,100875 |
| 摘 要： | 为证实3H在介质中的吸附,进行了饱和条件下的3H和Br-、3H和99Tc与非饱和条件下的3H和131I的溶质迁移野外现场实验和室内模拟实验.结果表明,3H的迁移速度滞后于Br-、99Tc和131I.模拟结果表明,3H在饱和黄土中迁移的延迟因子约为1.95～2.05,相当于在地下水中迁移的速度比地下水流速慢了50%.影响3H迁移滞后的因素主要有土壤黏土矿物的吸附,土壤中不流动水的存在及土壤的理化性质.该结果对用3H对地下水定年和测速的精度提出了质疑,也为中、低和极低放射性废物处置场中处置3H废物的安全评价提供依据. |
| 关 键 词： | 黄土 穿透曲线 延迟因子 |
| 文章编号： | 1000-6923(2007)03-0332-04 |
| 修稿时间： | 2006-08-31 |
Hysteresis of tritium transport in the Chinese loess |
|
| TENG Yan-guo,WANG Jin-sheng,GUO Min-li. Hysteresis of tritium transport in the Chinese loess[J]. China Environmental Science, 2007, 27(3): 332-335 | |
| Authors: | TENG Yan-guo WANG Jin-sheng GUO Min-li |
| Abstract: | In order to make sure the medium absorb tritium, 3H and Br-, 3H and 131I, 3H and 99Tc comparative migration experiment through field and lab tests in the saturated and unsaturated Chinese loess were carried out. The migration velocity of 3H was slower than Br-, 131I, 99Tc. The simulated result indicated that the retardation factor (Rd) of 3H was about 1.95 to 2.05, which implied that tritium transport velocity was only a half of the groundwater velocity. The absorption of clays in the soils, the immobile water in the soils and physical chemical characteristic of soils were the main influence factors of hysteresis of 3H transport. Application of 3H in determination of flow rate and groundwater dating could result in underestimations. In addition, the result of hysteresis of tritium can be used to guide 3H radioactive waste disposal and safety assessment. |
| Keywords: | 3H |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |