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本文用吸附法和解吸法对比研究了O、20N HCl中Sm(Ⅲ)和Y(Ⅲ)对UO_2~(2x)在仿Dowex50×8大孔树脂内扩散的加速效应,明确了UO_2~(2x)在吸附过程中的扩散常数B可以大于、小于或等于解吸过程申的B值,但扩散死时τd均小于后一过程中的τd值,通常在2秒以下;Y(Ⅲ)比Sm(Ⅲ)表现出更强的加速效应,作者归因于它的离子构型不同于镧系离子;还发现不同体系,不同过程中求得的B值均随温度而降低的异常结果,对此作了解释。
In this paper, the accelerating effects of Sm (Ⅲ) and Y (Ⅲ) on the diffusion of UO_2 ~ (2x) in Dowex 50 × 8 macroporous resin in O, 20N HCl were studied comparatively by adsorption and desorption methods. The diffusion constant B in the adsorption process can be greater than, less than or equal to the B value in the desorption process, but the τd at the time of diffusion death is smaller than the value of τd in the latter process, usually below 2 seconds. The ratio of Y (Ⅲ) to Sm Ⅲ) shows a stronger accelerating effect, the author attributed to its ion configuration is different from the lanthanide ions; also found in different systems, different values obtained in the process of B values ?? with the temperature decreased the abnormal results of this Explained.