摘要
研究了辐照的TBP从不同水相溶液中萃取铌的行为和对有机相中铌的洗涤效果。TBP的辐照剂量为1×10~3～7.5×10~5Gy。观测了钼、铀和F^-等对辐照的TBP萃取铌的影响。初步探讨了界面污物与D_(Nb)的关系及其对^(95)Nb的吸附。结果表明:辐照的TBP萃取铌时,D_(Nb)增加的主要原因是HDBP的作用。TBP和HDBP间的反协同效应使辐照的TBP萃取铌受到抑制。钼会明显地削弱TBP和HDBP的反协同效应,因而使辐照的TBP萃取铌时D_(Nb)显著增加。
The paper deals with a behaviour of extraction of niobium with TBP in thepresence of molybdenum and zirconium, uranium, or praseodynium in the aqueousphase. The dependence of extraction of nionium with TBP on the concentrations ofzirconium in 1～8 mol/l HNO_3 is described. The results show: 1. In the concentrations of 1×10^(-3) mol/l<[Zr]<5×10^(-2) mol/l, due to theaction of zirconium, D_(Nb) is increased with increasing of Zr concentration whenthe concentration of nitric acid is higher than 4 mol/l, and D_(Nb) is decreased withincreasing of Zr concentration when the concentration of nitric acid is lower than4 mol/l. 2. D_(Nb) increases when molybdenum and zirconium are present simultaneouslyin aqueous phase. D_(Nb) appears minimum when the concentration of molybdenumand zirconium are less than 1×10^(-2) mol/l and the concentration of nitric acid isat 3 mol/l.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1991年第6期37-42,共6页
Atomic Energy Science and Technology
关键词
硝酸溶液
铌
溶剂萃取
锆
钼
TBP
Niobium
Zirconium
Molybdenum
Uranium
Praseodynium
TBP
Solvent extraction
