Selective Extraction and Complexation Studies for Thorium(IV) with Bis-triamide Extractants: Synthesis, Solvent Extraction, EXAFS, and DFT
作者:Jinyang Kang、Rulei Wu、Long Li、Haiyang Hu、Yu Fan、Yongdong Jin、Chao Huang、Jing Chen、Chao Xu、Chuanqin Xia
DOI:10.1021/acs.inorgchem.1c01660
日期:2021.9.20
that Th(IV) was extracted as different species under different HNO3 concentrations, in which the slopes were 2.08 ± 0.20, 1.61 ± 0.03, and 1.54 ± 0.03 for L1 and 2.37 ± 0.22, 2.07 ± 0.17, and 1.76 ± 0.18 for L2 under 0.1, 1.0, and 3.0 M HNO3, respectively. A continuous variation method (Job plot) illustrated a 1.5:1 ligand/thorium (L/Th) ratio in a methanol phase, indicating that L1/L2 and Th(IV) could
设计并合成了三种辛基延长的双三酰胺萃取剂 ( L1 – L3 ),用于在煤油-HNO 3系统中选择性溶剂萃取 Th(IV) 而非 U(VI) 。L1和L2表现出良好的萃取性能和对 Th(IV) 的选择性超过 U(VI),并在 10 分钟内达到萃取平衡。在从 0.1 到 3.0 M的很宽的 HNO 3浓度范围内,L1和L2的 Th(IV) 对 U(VI) (SF Th/U )的分离系数范围从 12.1 ± 1.6 到 123.0 ± 20.2 和 15.2 ±分别为 2.4 至 88.1 ± 14.9。斜率分析表明,在不同的 HNO 下,Th(IV) 被提取为不同的物种3个浓度,其中,所述斜坡是2.08±0.20,1.61±0.03,和1.54±0.03对L1和2.37±0.22,2.07±0.17,而对于1.76±0.18 L2在0.1,1.0和3.0M的HNO 3分别。连续变化方法(作业图)说明甲醇相中配体/钍