镧系元素在离子交换中的加速效应

• 作 者: 贾东方 向红文 侯宪玉 陆显尧
• 机 构: 兰州大学化学系,兰州大学化学系,兰州大学化学系,北京第五研究所 79级毕业同学
• 出 处: 兰州大学学报
• 发表日期: 1984年S2期
• 关键词: 镧系离子 扩散常数 稀盐酸溶液 镧系 离子势 柱效 原子序数 线性关系 洗剂 磺酸

确认了稀盐酸溶液中镧系离子对UO_2~(2+)在磺酸型树脂内扩散的加速效应;25℃时在0.20N盐酸中分别加入后Ce(Ⅲ)到Er(Ⅲ)的镧系离子以解吸UO_2~(2+),使其扩散常数B分别增高7—17倍;τd减小55倍,B值随镧系原子序数的递增而减低并和离子势成线性关系,用0.20NHCl+0.05NLn~(3+)作流洗剂时,与B的增高相一致,显著提高了UO_2~(2+)的色谱柱效。

The accelerating effect of lanthanide ions in dilute hydrochloric acid solution on the diffusion of UO_2 ~ (2+) in sulfonic acid resin was confirmed. The lanthanide series of Ce (Ⅲ) to Er (Ⅲ) were added into 0.20N hydrochloric acid at 25 ℃, Ion desorption of UO_2 ~ (2+), the diffusion constant B were increased by 7-17 times; τd decreased by 55 times, B value decreases with increasing atomic number of lanthanide series and the ion potential linear relationship with 0.20NHCl When 0.05NLn ~ (3 +) was used as a flux, it was consistent with the increase of B, and the column efficiency of UO_2 ~ (2+) was significantly increased.