锶、铯在压实柯尔碱膨润土中的扩散行为  

Diffusion Behaviors of Sr,Cs in Compacted Keerjian Bentonite

作　　者：刘艳[1,2] 王青海[2] 陈洁[2] 张永浩[2] 张瑞荣[2] 丁志斌[1] 刘勇[2] 刘莉[2] 

机构地区：[1]中国人民解放军理工大学国防工程学院,南京210007 [2]西北核技术研究所,西安710024

出　　处：《环境化学》2013年第12期2250-2255,共6页Environmental Chemistry

摘　　要：采用扩散池法研究了88Sr、133Cs在室温条件下、不同干密度柯尔碱膨润土中的扩散行为.研究结果表明,Cs和Sr两种元素的有效扩散系数和表观扩散系数均随柯尔碱膨润土干密度的增加而减小.Cs的表观扩散系数较Sr小,吸附分配系数较Sr大,说明柯尔碱膨润土对Cs吸附阻滞性好于Sr.The diffusion behaviors of ^88Sr and ^133Cs in compacted Keerjian bentonites with different dry density were investigated using diffusing pool method at room temperature. The effective diffusion coefficients and apparent diffusion coefficients of Sr, Cs in compacted bentonite decreases with increasing dry density of the bentonite. Apparent diffusion coefficient of Cs is smaller than that of St, and distributioneoefficient of Cs is larger than that of Sr. It was shown that the adsorption and retardation of Keerjian bentonite for Cs was better than that for Sr.

关 键 词：锶 铯 柯尔碱膨润土 扩散系数 扩散池法 

分 类 号：TL942.1[核科学技术—辐射防护及环境保护]