【摘要】 本文用流洗色谱法研究了丙二酸和其他有机酸组成的混合有机酸对铀酰离子在离子交换树脂中的加速传质作用。发现随着羟基羧酸-丙二酸的混合比增加,铀流洗峰的移动速度增加,延迟时间减小。这一结果以柠檬酸-丙二酸混合酸作用最为明显,双配位酸组成的混合酸对两者影响较小,并对实验结果作了探讨性的解释。此外,从离子交换正、逆反应的扩散机制的不同,阐述了流洗色谱的不对称性。更多还原

【Abstract】 The accelerative effects of mixed organic acids of malonic and other organic ligand acids on mass transfer of U(Ⅵ) in ion exchange are studied by elution development. It is found that the migration rate of the elution peak of U(Ⅵ) increases and the delay-time decreases as the ratio of hydrocarboxylic and malonic acid increases , especially, for the mixed acid of citric and malonic acid, but little effect is observed on those two parameters for the mixed acids of dicarboxylic acids. Some exploratory explanations are given to the conclusions.Futhermore, the asymmetry of the elution chromatogram is explained from the point of view of the diffusion mechanisms of reversible ion exchange process.更多还原