Nitric Acid and Water Extraction by T2EHDGA in n-Dodecane

被引：35
|
作者：
Campbell, Emily L. [1 ,2 ]
Holfeltz, Vanessa E. [1 ,3 ]
Hall, Gabriel B. [1 ]
Nash, Kenneth L. [2 ]
Lumetta, Gregg J. [1 ]
Levitskaia, Tatiana G. [1 ]
机构：
[1] Pacific Northwest Natl Lab, POB 999 MSIN P7-25, Richland, WA 99352 USA
[2] Washington State Univ, Dept Chem, Pullman, WA 99164 USA
[3] Oregon State Univ, Sch Nucl Sci & Engn, Corvallis, OR 97331 USA
来源：
SOLVENT EXTRACTION AND ION EXCHANGE | 2017年 / 35卷 / 07期
关键词：
ALSEP; T2EHDGA; speciation model; trivalent actinides and lanthanides; extraction constant; F-ELEMENT CATIONS; N; N'; N'-TETRA(2-ETHYLHEXYL); DIGLYCOLAMIDE; TODGA; AGGREGATION; SEPARATION; CHEMISTRY; BEHAVIOR; SPECTROSCOPY; ACTINIDES; EU(III);
D O I：
10.1080/07366299.2017.1400161
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Liquid-liquid distribution behavior of nitric acid (HNO3) and water by a diglycolamide (DGA) ligand, N,N,N',N'-tetra-2-ethylhexyldiglycolamide (T2EHDGA), into n-dodecane diluent was investigated. Spectroscopic Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) characterization of the organic extraction solutions indicate the T2EHDGA carbonyl coordinates with HNO3 and progressively aggregates at high acid conditions. Water extraction increases in the presence of HNO3. The experimentally observed distribution of HNO3 was modeled using the computer program SXLSQI. The results indicated that the formation of two organic-phase speciesHNO(3)T2EHDGA and (HNO3)(2)T2EHDGAsatisfactorily describes the acid distribution behavior. Temperature-dependent solvent extraction studies allowed for the determination of thermodynamic extraction constants and H and S parameters for the corresponding extractive processes.
引用
收藏
页码：586 / 603
页数：18
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