研究了大孔阳树脂内碱土、3d过渡元素和稀土等离子对UO_2~(2+)加速传质的起因及规律.发现,树脂内磺酸根及与之结合的金属离子周围水合数的降低是导致UO_2~(2+)被加速传质的起因.因此,同价离子对UO_2~(2+)的加速效应一般随其离子半径的增加而增大,但加速离子因不同的电子结构而具有特强的键合力时,会使其加速效应发生异常. The reason and regularity of accelerating mass transfer of UO_2 ~ (2+) by alkaline earth, 3d transition element and rare earth ion in macroporous cation resin were studied. It was found that the reduction of hydration number of sulfonate and its associated metal ions in the resin resulted in Therefore, the accelerating effect of the same valence ion on UO_2 ~ (2+) generally increases with the increase of its ionic radius, but the accelerating ions have special effects due to different electronic structures Strong bonding force, will make its acceleration effect anomalies.