TRPO对镅的萃取及与DHDECMP复合萃取的研究

A STUDY ON THE EXTRACTION OF BY TRPO AND IT′S COORPERATIVE EXTRACTION WITH DHDECMP

研究了三烷基氧膦（ＴＲＰＯ）－二甲苯溶液从硝酸体系中萃取镅（Ⅲ）的性能及从有机相中反萃取镅（Ⅲ）的条件。同时也研究了ＴＲＰＯ－ＤＨＤＥＣＭＰ混合体系对镅（Ⅲ）的复合萃取效应。结果表明：ＴＲＰＯ在低酸度硝酸体系中是镅（Ⅲ）的良好萃取剂；在ｐＨ＝５．０的ＤＴＰＡ－乳酸介质中，镅（Ⅲ）可以被完全反萃到水相中；ＴＲＰＯ－ＤＨＤＥＣＭＰ混合溶液复会萃取镅（Ⅲ）时没有明显的协萃效应。

The extraction behavior of Am￣(3+) in trialkylphosphie oxide(TRPO)-xylene/HNO_3 and thestripping conditions are studied.The ccorperative extraction with TRPO- DHDECMP is also in-vestigated.The results show that TRPO is an excellent extractant for Am￣(3+) in nitric acid of lowconcentration and Am￣(3+)can be stripped readily with DTPA-lactate at pH=5.No synergisticeffects are observed with TRPO-DHDECMP mixture in the experiment.