摘要
研究了N-吡咯烷基-2-吡啶甲酰胺(NPPFA)与1,10-菲啰啉(1,10-phenanthroline,phen)在硝酸介质中对U(Ⅵ)的协同萃取行为。以二氯乙烷为稀释剂,考察了NPPFA的摩尔分数、水相pH值、盐析剂浓度及温度对萃取分配比的影响。结果表明,NPPFA与phen有显著的协萃作用;当pH大于2.2时,萃取体系易发生乳化现象;盐析剂的加入可以大大提高萃取效率。并用斜率法确定了萃合物的组成为UO2(NO3)2.NPPFA.phen。
The synergistic extraction of U（Ⅵ） from nitric acid solution into mixture of 1-（2- pyridyl）-1-pyrrolidyl-1-methanone （NPPFA） and 1, 10-phenanthroline （phen） in dichloride ethane was studied. The influences of mole fraction of NPPFA, value of pH, the concentration of salting-out agent and temperature on the distribution ratio were discussed. The results show that NPPFA and phen give strong synergism and the distribution ratio of U （Ⅵ） is high by introducing salting-out agent. The formula of synergistic extraction compounds determined by slope analysis method is UO2 （NO3）2 · NPPFA · phen.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2008年第3期152-155,共4页
Journal of Nuclear and Radiochemistry
