Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid
-
Man Sun
,
Yu-Liang Zhao
Abstract
Room-temperature ionic liquids (RTILs) have recently received increasing attention as solvent alternatives for possible application in spent fuel reprocessing, particularly in the extraction of metal ions from high-level radioactive aqueous waste, due to their unique physical and chemical properties. Herein, the solvent extraction of the uranyl ions (UO22+) was performed using N,N′-diethyl-N,N′-di(para)tolyl-dipicolinamide (Et(p)TDPA) as the extractant in a commonly used ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim][PF6]). The effects of vortexing time, phase ratio and the concentration dependence of Et(p)TDPA, nitric acid and sodium nitrate on the extraction were studied in detail. The extraction mechanism was deduced based on the slope analysis and UV-vis measurement. The distribution ratio of U from 3 mol/L nitric acid by 0.3 mol/L EtTDPA/C4mimPF6 is found to be almost 100. Conventional log-log plot analysis of the extraction equilibrium data suggests that the ions are extracted as a complex in 2:3 ratio of UO22+ to extractant, and the extraction most likely occurs by a cation-exchange mode since the concentration of C4mim+ in the aqueous phase increases linearly with the percent extraction of UO22+ evidenced by UV-vis measurement. This work promises to provide new efficient media based on RTILs for separation of uranium from the radioactive aqueous waste.
©2014 Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Frontmatter
- Editorial
- Preface
- New nuclear facilities and their analytical applications in China
- Advances in computational actinide chemistry in China
- Recent advances in study of uranium surface chemistry in China
- Nuclear fuel cycle-oriented actinides separation in China
- Radiopharmaceuticals in China: current status and prospects
- Gas-phase chemistry of Mo, Ru, W, and Os metal carbonyl complexes
- Extraction complexes of Pu(IV) with carbamoylmethylphosphine oxide ligands: A relativistic density functional study
- Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid
- Evaluation study on a macroporous silica-based isohexyl-BTP adsorbent for minor actinides separation from nitric acid medium
- A density functional theory study of the competitive complexation of pyridine against H2O and Cl−− to Cm3+ and Ce4+
- Chemical behavior of neptunium in the presence of technetium in nitric acid media
- Nitrate conversion and supercritical fluid extraction of UO2-CeO2 solid solution prepared by an electrolytic reduction-coprecipitation method
- An advanced purex process based on salt-free reductants
- Extraction behavior of cesium and some typical fission and non-fission products with a new 1,3-di(1-decyloxy)-2,4-crown-6-calix[4]arene
- New insight into Eu(III) sorption mechanism at alumina/water interface by batch technique and EXAFS analysis
- Retention mechanisms and microstructure of Eu(III) on manganese dioxide studied by batch and high resolution EXAFS technique
- Extraction and purification of 227Ac and development of solid 219Rn source
- Mechanism of thorium biosorption by the cells of the soil fungal isolate Geotrichum sp. dwc-1
- Carbon-11 labeled stilbene derivatives from natural products for the imaging of Aβ plaques in the brain
- Synthesis, radiolabeling and in vivo biological evaluation of 99mTc-labeled MAG3-based bisnitroimidazole complexes as tumor hypoxia markers
- γ-radiation effect on dicyclohexano-18-crown-6 aqueous solution in the presence of metal cations
Articles in the same Issue
- Frontmatter
- Editorial
- Preface
- New nuclear facilities and their analytical applications in China
- Advances in computational actinide chemistry in China
- Recent advances in study of uranium surface chemistry in China
- Nuclear fuel cycle-oriented actinides separation in China
- Radiopharmaceuticals in China: current status and prospects
- Gas-phase chemistry of Mo, Ru, W, and Os metal carbonyl complexes
- Extraction complexes of Pu(IV) with carbamoylmethylphosphine oxide ligands: A relativistic density functional study
- Solvent extraction of uranium(VI) by a dipicolinamide using a room-temperature ionic liquid
- Evaluation study on a macroporous silica-based isohexyl-BTP adsorbent for minor actinides separation from nitric acid medium
- A density functional theory study of the competitive complexation of pyridine against H2O and Cl−− to Cm3+ and Ce4+
- Chemical behavior of neptunium in the presence of technetium in nitric acid media
- Nitrate conversion and supercritical fluid extraction of UO2-CeO2 solid solution prepared by an electrolytic reduction-coprecipitation method
- An advanced purex process based on salt-free reductants
- Extraction behavior of cesium and some typical fission and non-fission products with a new 1,3-di(1-decyloxy)-2,4-crown-6-calix[4]arene
- New insight into Eu(III) sorption mechanism at alumina/water interface by batch technique and EXAFS analysis
- Retention mechanisms and microstructure of Eu(III) on manganese dioxide studied by batch and high resolution EXAFS technique
- Extraction and purification of 227Ac and development of solid 219Rn source
- Mechanism of thorium biosorption by the cells of the soil fungal isolate Geotrichum sp. dwc-1
- Carbon-11 labeled stilbene derivatives from natural products for the imaging of Aβ plaques in the brain
- Synthesis, radiolabeling and in vivo biological evaluation of 99mTc-labeled MAG3-based bisnitroimidazole complexes as tumor hypoxia markers
- γ-radiation effect on dicyclohexano-18-crown-6 aqueous solution in the presence of metal cations
