Solid phase extraction of trivalent actinides and lanthanides using a novel CMPO-RTIL based chromatographic resin
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S. A. Ansari
Abstract
A novel extraction chromatographic resin was prepared by impregnating CMPO-RTIL (C8mim+·NTf2−) on Chromosrob-W for the removal of trivalent actinides from aqueous solution and its behaviour was compared with previously reported CMPO-n-dodecane resin. Under identical condition, the Kd value of Am(III) by CMPO-RTIL resin (Kd at 3 M HNO3 = 5805 ± 525) was one order magnitude higher than that obtained with CMPO-n-dodecane resin (Kd at 3 M HNO3 = 610 ± 55). The sorption reaction of Am(III) followed a first-order rate law with both the resins. The metal sorption capacities for Eu(III) at 3 M HNO3 were found to be 18.95 ± 1.13 mg and 20.52 ± 1.25 mg/g of CMPO-RTIL and CMPO-n-dodecane resins, respectively. The analysis of the sorption data by different models supported the hypothesis that the sorption of Eu(III) on the resins was actually limited by the saturation of the CMPO complexing sites on the resin. The free energy for the sorption of Eu(III) obtained from D–R isotherm was 17.67 ± 1.63 kJ/mol and 16.51 ± 2.05 kJ/Mol for CMPO-RTIL and CMPO-n-dodecane resins, respectively. The sorption free energy is an indication of chemisorption monolayer mechanism. The monolayer sorption mechanism was also confirmed by the theoretical approach calculated based on the sorption kinetics.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Thermodynamics of Np(IV) complexes with gluconic acid under alkaline conditions: sorption studies
- Interaction of uranium(VI) with bioligands present in human biological fluids: the case study of urea and uric acid
- Approach to on-line monitoring of PUREX process using chemometric processing of the optical spectral data
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- Stability studies of N,N,N´,N´-tetra-(2-ethylhexyl) dithiodiglycolamide (DTDGA)
- The effect of fluoride and silicate ions on the coprecipitation of gadolinium with calcium in phosphoric and sulpho-phosphoric media
- An electrochemical technique to prepare 55Fe source for the calibration of the X-ray detectors
- A novel and facile approach for the preparation of 133Ba source core, encapsulation and quality evaluation
