摘要
设置一系列加有不同添加剂的地球化学屏障，利用静态平衡实验，并与未加添加剂的空白实验对比，分析其对Ｕ，Ｃｏ，Ｓｒ的阻滞性能；并通过计算Ｋｄ值，对屏障的综合阻滞性能进行分析，选出恰当的添加剂。结果表明：ＮａＳ２作碱性—还原添加剂，利于核素的化学沉淀反应，而且Ｋｄ值显著地增加，屏障对Ｕ，Ｃｏ，Ｓｒ的阻滞性能最好。
By setting a series set of artificial geochemical barriers with different additives and using static balance experiments,the barrier's retardant property to U,Co,Sr is determined,contrasting to the barrier without additive,to varify the effect of artificial barrier on nuclear waste.Based on the analysis of chemical mechanism and caculat K d of the barriers,the best atlditives of artificial barrier are chosen。It has shown that Na 2S (as reductive-alkali additive),bendfit the chemical depodition of nuclear dlements,make K d value in crease dramatically and make the barries have the best performance retarding U.Co and Sr.
出处
《地质灾害与环境保护》
1999年第2期63-67,共5页
Journal of Geological Hazards and Environment Preservation
关键词
地球化学屏障
添加剂
分配系数
放射性废物处理
Geochemical barriers Additives Obsorption distribution Coefficient( K d )
