期刊
SOLVENT EXTRACTION AND ION EXCHANGE
卷 28, 期 4, 页码 495-509出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/07366299.2010.480928
关键词
Uranyl nitrate species; TBP; RTIL; ESI-MS; MALDI-MS
资金
- USDOE, Office of Basic Energy Sciences, Division of Chemical Sciences
The extraction of uranyl nitrate by TBP in two room temperature ionic liquids (RTILS), viz. 1-alkyl-3 -methyl imidazolium (Cnmim, n = 4 and 8) cation with hexafluorophosphate anion and, for comparison purposes, in dodecane has been studied. The species extracted were determined by slope analysis, UV-VIS spectra and supported for the first time by two known soft ionization mass spectrometric techniques, viz. MALDI-MS and ESI-MS. The results show that the extraction mechanisms differ in the two RTILS, as cation exchange is more likely for a butyl substituted RTIL, C4mimPF6 as noted in literature, whereas the formation of a neutral adduct (i.e., UO2(NO3)22TBP) by a solvation mechanism is operative for octyl analogue, C8mimPF6.
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