HNO_3-TBP/OK体系中锆、锝共萃取行为的研究

STUDY ON THE COEXTRACTION BEHAVIOUR OF Zr(Ⅳ) AND TcO_4~- IN HNO_3-30% TBP/OK SYSTEM

摘要: 测定了不同锆、锝浓度和不同硝酸浓度下,Zr(Ⅳ),TcO-4在HNO3 30%TBP/OK中的分配比。实验结果表明,TcO-4不仅以阴离子形式与锆配位形成共萃,而且还可以促进锆的萃取,溶液中存在明显的相互促进被萃取现象。

Abstract: The distribution ratios of Zr(Ⅳ) and TcO-4 between 30%TBP/OK and aqueous solution of various concentrations Zr(Ⅳ), TcO-4 and HNO3 have been investigated. The results show that coextraction of Zr(Ⅳ) and TcO-4 has obvious mutual promotion effect--technetium in the form of anion TcO-4 can coordinate with Zr(Ⅳ) to form coextraction and promote extraction of Zr(Ⅳ).