阴离子交换法分离锝的研究

摘要: 测定了在不同硝酸根浓度和酸度下，锝在树脂相和水相间的分配比，求出了硝酸根和高锝酸根在阴离子交换树脂上的交换平衡常数以及高锝酸的离解平衡常数；得到了一个可根据样品中硝酸根浓度、酸度计算得在两相间分配比的公式。还测定了树脂床的性能，如湿树脂密度、空隙体积、总交换容量等，给出了在含大量硝酸根溶液中用阴离子交换树脂分离锝时，保留体积与样品溶液中硝酸根浓度、酸度以及树脂床体积之间的关系，由此可确定分离样品溶液的最大体积。

Abstract: STUDY ON SEPARATION OF TECHNETIUM WITH ANION-EXCHANGE RESINWu Jizong(China Institute of Atomic Energy,P.O.Box 275(88)Beijing 102413)Abstract:Distribution ratio of technetium between AG1×4 anion-exchange resin and exchange aqueous solution containing different concentration of nitrate and nitric acid is determined.The equilibrium constant of pertechnetate between the two phases and the dissociation equilibrium constant of pertechnetic acid are measured.The density,interstitial volume and exchange capacity of the resin are also measured.Equations are given to determine the maximum volume of the sample containing technetium to be se-parated in batch and column operation.Keywords:Anion-exchannge Technetium Waste solution