DTPA与铀、镎、钚的配位作用Ⅱ.DTPA存在时TBP萃取Np(Ⅳ)的动力学研究

COMPLEX REACTIONS OF DTPA WITH URANIUM,NEPTUNIUM AND PLUTONIUM Ⅱ STUDY ON EXTRACTION KINETICS OF Np(Ⅳ) BY TBP DTPA SYSTEM

研究了ＤＴＰＡ存在时ＴＢＰ萃取Ｎｐ（Ⅳ）动力学。研究结果表明，在镎的萃取、反萃过程中ＨＤＢＰ的存在使反应速率变慢；但当体系中含有常量铀时，铀与ＨＤＢＰ结合。

The kinetics in extraction process of Np(Ⅳ) by TBP in the presence of DTPA is investigated.The results show that the HDBP can lower the reaction rates of extracting and stripping Np(Ⅳ). But in the presence of sufficient uranium the extraction and stripping of Np(Ⅳ) become quick,as HDBP firstly reacts with uranium.So,in the practical application the reaction rates of extraction processes of Np(Ⅳ) by TBP in the presence of DTPA could not be too tow.