TRPO萃取Tc(Ⅶ)的工艺研究

摘要: 研究了高放废液中主要金属离子对ＴＲＰＯ萃取Ｔｃ（Ⅶ）的影响。建立了硝酸介质中３０％ＴＲＰＯ－煤油萃取Ｔｃ（Ⅶ）的分配比模型。研究了３０％ＴＲＰＯ－煤油负载有机相中Ｔｃ（Ⅶ）的反萃行为，给出了反萃Ｔｃ（Ⅶ）的条件。与用５—６ｍｏｌ／ＬＨＮＯ３反萃Ｔｃ（Ⅶ）相比，用去离子水、≤０．１ｇ／Ｌ（ＮＨ４）２ＣＯ３和≤１ｇ／ＬＮＯ２ＣＯ３可以更有效地反萃Ｔｃ（Ⅶ）。

Abstract: STUDY ON THE EXTRACTION BEHAVIOR OF TECHNETIUM WITH RESPECT TO THE TRPO PROCESSFeng Xiaogui Song Chongli Liang Junfu Jiao Rongzhou(Institute of Nuclear Energy Technology, Tsinghua University ,P.O.Box 1021,Beijing 102201)ABSTRACTThe effects of Na＋,Ni2＋,Al3＋,Fe3＋ and Nd3＋ concentrations on the extraction of Tc(Ⅶ) are studied respectively. An empirical equation is derived for distribution ratios of Tc(Ⅶ) in simulated high level liquid waste among the investigated range. The stripping behavior of technetium in 30%TRPOkerosene solution is studied and stripping parameters are given. Technetium can be more efficiently stripped by deionized water,≤0.1g/L (NH4)2CO3 and ≤1g/L Na2 CO3 than by 5-6 mol/L HNO3Key words TRPO Extraction Technetium