摘要
研究了Ｎ，Ｎ－二丁基辛酰胺（ＤＢＯＡ）从硝酸介质中萃取铀的机理。考察了水相酸度、盐析剂ＬｉＮＯ３浓度以及萃取剂浓度对萃取分配比的影响，结合红外光谱分析了萃合物结构。ＴＢＰ对ＤＢＯＡ萃取铀的影响比较复杂，在低ＴＢＰ浓度下，两种萃取剂具有协同效应，但随着ＴＢＰ浓度的增大出现反协同效应。红外光谱表明两种中性萃取剂混合后分子间没有明显的相互作用，反协同效应可能是ＴＢＰ改变了有机溶液的极性所致。利用斜率法确定了协萃络合物的组成。
The extraction mechanism of uranium(VI) with N,N- dibutyloctylamide(DBOA) in kerosene has been studied.The influences of concentrations of aqueous nitric acid,salting-out agent LiNO_3 and extractant on the extraction distribution ratios are investigated.The structure of the extracted complex is analyzed by the aid of IR spectra. While there exists synergism for the extraction of uranium(VI) with TBP and DBOA at lower TBP concentration,the antagonistic effect occurs at higher TBP concentration.However,the IR spectra indicate that there is no interaction between these two extractants.The complicated effect caused by TBP may be due to the change in polarity of organic phase with the increase of TBP concentration.The stoichiometry of the complex formed with TBP and DBOA was determined by the slope method.
出处
《核技术》
CAS
CSCD
北大核心
1999年第3期183-186,共4页
Nuclear Techniques
