摘要
采用浅床法测定了在络合酸的存在下 UO2 + 2 和H+离子在树脂相的互扩散系数 D .考察了洗脱液的 p H值、二元络合酸的种类和碳链的长度对 D的影响 .结果表明 ,络合酸的存在可显著提高 D值 ,其中溴代丁二酸的存在可使 D值增大 3.
The inter diffusion coefficients D between UO 2+ 2 and H + ions in the resin in the presence of complex carboxylic acids were determined by “shallow bed” technique. The effects of pH values in the eluents, species of dicaboxylic acids and their carbon chain length on D values were investigated. The results show that the D values were increased due to the presence of complex carboxylic acids. When the bromosuccinic acid was present in eluents, the D value was the largest and it was 3 5 times larger in contrast with no carboxylic acid.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2000年第2期72-76,共5页
Journal of Lanzhou University(Natural Sciences)
关键词
离子交换动力学
浅床技术
络各剂
铀
分离
carboxylic acid
cation exchange kinetic
inter-diffusion coefficient
shallow-bed technique
