Efficacious selective separation of U(VI) over Mo(VI) using novel 2,9-diamide-1,10-phenanthroline ligands: Liquid-liquid extraction and coordination chemistry
作者:Taoyuan Xiu、Simei Zhang、Peng Ren、Siyan Liu、Shuai Wang、Hamza Shehzad、Jingyang Wang、Meng Zhang、Guoan Ye、Caishan Jiao、Qunyan Wu、Liyong Yuan、Zhifang Chai、Weiqun Shi
DOI:10.1016/j.cclet.2023.108440
日期:2023.11
experiments were performed under different conditions to evaluate the potential application of these ligands for separation of U(VI) over Mo(VI). With the growth of alkyl chain, the solubility of ligands could be greatly improved, and the separation effect of U(VI) over Mo(VI) gradually increased. The SFU/Mo were around 10,000 at 4 mol/L HNO3. Three stripping agents were tested with the stripping efficiency
铀和钼是重要的战略元素。99 Mo的生产和铀矿的湿法冶金工艺面临着铀和钼分离的难题。本研究合成了四种菲咯啉二酰胺配体,并在不同条件下进行了萃取和反萃实验,以评估这些配体在分离 U(VI) 和 Mo(VI) 方面的潜在应用。随着烷基链的增长,配体的溶解度大大提高,U(VI)对Mo(VI)的分离效果逐渐增强。在4 mol/L HNO 3下,SF U /Mo约为10,000 。测试了三种反萃剂Na 2 CO 3的反萃效率(5%) > H 2 O > HNO 3 (0.01 mol/L)。三种剥离剂的剥离百分比均接近一致,表明配体具有回收利用的潜力。使用电喷雾电离质谱、紫外可见光谱和单晶 X 射线衍射评估 U(VI) 与配体配合物的化学化学计量为 1:1。理论计算与实验结果的一致性进一步解释了协调机制。