玻璃固化体在处置库地下水中的浸出机理研究  

STUDY ON THE LEACH MECHANISM OF 90-19/U GLASS FORM IN UNDER GROUND WATER OF DISPOSAL SITE

作　　者：盛嘉伟[1] 罗上庚[1] 汤宝龙[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所

出　　处：《核化学与放射化学》1996年第2期79-83,共5页Journal of Nuclear and Radiochemistry

摘　　要：研究了９０－１９／Ｕ玻璃固化体在处置库地下水中的浸出行为，得到了玻璃总失重及Ｂ、Ｌｉ、Ｓｉ的失重值并与去离子水中的浸出行为进行了比较。实验发现，地下水中的离子会影响玻璃固化体的浸出。玻璃固化体在地下水中的浸出是以离子交换反应为控速步骤，反应的表观活化能为５１．６ｋＪ／ｍｏｌ。The leach behavior of 90-19/U glass form in underground water (UW) of disposal site and in the deionized water (DIW) is studied. The total mass losses of glass form and the normalized element mass losses of B, Li and Si in UW are presented and compared to DIW.It is found that the ions in UW affect the leach behavior of 90-19/U glass.At the beginning of the reaction the reaction rate of the glass is smaller in UW than in DIW due to the low glass dissolution affinity in UW which is defined as (1-c/K).The rate determining step of leach reaction of 90-19/U glass in UW during the entire reaction period is the ion-exchange reaction. The apparent activation energy of glass reaction in UW is 51. 6kJ/mol.

关 键 词：玻璃固化体 地下水 高极废液 浸出机理 

分 类 号：TL942.101[核科学技术—辐射防护及环境保护]