含锶极低放废物处置的地球化学工程屏障研究  

Geochemical Engineering Barrier for the Disposal of Very Low-Level Radioactive Waste Containing Strontium

作　　者：康厚军[1] 张东[1] 李宽良[2] 傅依备[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900 [2]成都理工大学环境工程学院,四川成都610059

出　　处：《核化学与放射化学》2006年第4期225-230,共6页Journal of Nuclear and Radiochemistry

基　　金：中国工程物理研究院基金资助项目(20030544)

摘　　要：为了选择合适的添加剂以提高岩土对锶的吸附能力,采用测定吸附比的方法,选择8种添加剂加入到4种基础物料中进行实验。结果表明,在①号基础物料中,加入Na2S和Na2CO3两种添加剂后,Kd值从16.5分别增加到3.07×103和2.03×103;在②号基础物料中,加入Na2S和Na2CO3后,Kd值从26.0分别增加到3.50×103和2.20×103,达到极低放废物填埋处置的屏障要求。对添加剂的屏障机制进行了探讨,认为产生SrCO3沉淀是提高吸附比的主要原因。In order to improve the adsorptive capability of soil to strontium, the appropriate eight additives and four basic materials were selected through measuring the adsorption ratio. The results show that the Kd value rises respectively from 16. 5 to 3.07 × 103 and 2. 03 × 103 when Na2S and Na2CO3 were added to the No. 1 basic material. So did the No. 2 basic material, the Kd value rises respectively from 26.0 to 3.50× 10^3 and 2.20 × 10^3. Therefore the addition of Na2 S and Na2 COs can meet the barrier need of very low-level radioactive＇s disposal. The barrier mechanism of additive was discussed, the main factor of the adsorption ratio＇s improvement is the formation of SrCO3.

关 键 词：锶 极低放废物 地球化学 添加剂 屏障 

分 类 号：O614.62[理学—无机化学]