5,7─二溴─8─羟基喹啉与含N协配体对镅和铕的萃取研究

5,7─二溴─8─羟基喹啉与含N协配体对镅和铕的萃取研究

摘要

摘要: 研究了在实验温度为２５℃，水相为硝酸介质，离子强度为０．１ｍｏｌ／ｋｇ，氯仿为稀释剂时，５，７－二溴－８－羟基喹啉单独萃取及其与２，２′－联吡啶、２，９－二甲基－１，１０－啡绕啉、４，７－二苯基－１，１０－啡绕啉对三价镅和铕的协同萃取。结果表明：５，７－二溴－８－二羟基喹啉对镅的萃取能力略高于铕，分离因数βＡｍ／Ｅｕ为１．２９；３种协萃剂的协萃能力依次为：４，７－二苯基－１，１０－啡绕啉＞２，２′－联吡啶＞２，９－二甲基－１，１０－啡绕啉，相应的分离因数βＡｍ／Ｅｕ分别为：１０．８０、１．６２和０．４９。

Abstract: EXTRACTION OF Am3＋ AND Eu3＋ WITH 5，7DIBROMO8QUINOLINOL AND SOME NSYNERGIC LIGANDSLiu Demin Liu Xiangfeng Yang Yuseng(North Western Institute of Nuclear Technology,P.O.Box 69(17),Xi′an 710024)ABSTRACTThe extraction behaviors of Am3＋ and Eu3＋ from nitrate medium with 5,7dibromo8quinolinol in chloroform at 25℃ are studied.The synergetic effects of 5,7dibromo8quinolinol with 2,2′bipyridine,2,9dimethyl1,10phenanthroline and 4,7diphenanthroline are also studied.The results show that in single extracting system of 5,7dibromo8quinolinol the separation factor for Am and Eu is 129;in the synergetic systems of 5,7dibromo8quinolinol with 2,2′bipyridine,5,7dibromo8quinolinol with 2,9dimethyl1,10phenanthroline and 5,7dibromo8quinolinol with 4,7diphenanthroline,the separation factors are 162、049 and 108,respectively.Key words Americium Europium 5,7Dibromo8quinolinol Extraction

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