A novel malonamide grafted polystyrene-divinyl benzene resin for extraction, pre-concentration and separation of actinides

Ansari, Seraj A.; Mohapatra, P. Κ.; Manchanda, V. Κ.

doi:10.1016/j.jhazmat.2008.04.093

Cited by 50 publications

(14 citation statements)

References 29 publications

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“…Recently, many works have been reported for uranium extraction using the organic extractant imprinted with an inert polymeric support like polystyrene [27][28][29][30]. Also, uranium sorption from phosphoric acid solutions using a series of polymeric resin beads impregnated with the synergistic combination D2EHPA/TOPO at various mole ratios was studied whereas the macroporous polystyrene-divinyl benzene copolymer containing aminophosphonic functional groups (Duolite DES 467) was separately applied [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of uranium recovery from phosphoric acid by an aminophosphonic resin and application to wet process phosphoric acid

Cheira

2015

Eur. J. Chem.

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The chelating aminomethylphosphonic resin Amberlite IRC747 is used for uranium recovery from a synthetic phosphoric acid solution. The operating conditions of uranium extraction have been experimentally optimized by the batch technique viz., the phosphoric acid concentration, the contact time, the initial uranium concentration and the temperature. The effect of some interfering ions upon the effective capacity of the resin has also been examined. It has thus been found that the maximum uranium adsorption capacity of the studied chelating resin was found to attain 86.5 mg/g at 5 M phosphoric acid using 0.1 g resin for 120 min contact time with 50 mL acid assaying 200 mg U/L and room temperature. The obtained equilibrium data agreed well with the Langmuir isotherm model and the relevant thermodynamic parameters (ΔG, ΔH and ΔS) were evaluated and the uranium adsorption was found to be an endothermic reaction and of spontaneous nature. From the kinetic experiments it was shown that U(VI) adsorption followed the pseudo-second order kinetics model and the intraparticle diffusion model. Also, it has been possible to reveal from the kinetic and isotherm data the chemisorption nature of uranium on the Amberlite IRC747 resin. The adsorbed uranium ions can almost be completely eluted with 0.8 M (NH4)2CO3 solution from the loaded resin at room temperature. The studied optimized conditions have successfully been applied for uranium recovery from Abu Zaabal wet process phosphoric acid (WPPA).

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Section: Introductionmentioning

confidence: 99%

Characteristics of uranium recovery from phosphoric acid by an aminophosphonic resin and application to wet process phosphoric acid

Cheira

2015

Eur. J. Chem.

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“…This is signicantly better than the pre-concentration factor of about 40 obtained with the malonamide-graed resin for the pre-concentration of U. 26…”

Section: Analytical Applicationmentioning

confidence: 69%

First example of diglycolamide-grafted resins: synthesis, characterization, and actinide uptake studies

et al. 2014

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Two diglycolamide (DGA)-functionalized chelating extraction resins were prepared for the first time by grafting onto a silica matrix and were evaluated for their actinide ion uptake behavior. The resins with one and two DGA moieties, termed as resin-I and resin-II, were quite efficient for the actinide ions, particularly the tri-and the tetravalent ions in a way similar to the diglycolamide extractants. The hexavalent UO 2 2+ ion was poorly sorbed onto the resins. The resins were characterized by thermal analysis, while the surface area and surface morphology were analyzed by BET and SEM techniques. Resin-II showed a pre-concentration factor of >100 for Am(III) by elution with 0.01 M EDTA.

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“…[17][18][19] Constant K d values were attained in about 40 min for DMDBMA resin and within 10 min for 2EHMA resin, and the kinetics results were independent of the metal ion. It is likely that these kinetics results were controlled by the diffusion of the metal ions.…”

Section: Uptake Kinetics Of Eu(iii) Th(iv) and U(vi)mentioning

confidence: 90%

“…The reported order of distribution coefficients (K d values) for di-[bis (2-ethylhexyl) malonamide] (2EHMA) resin was U(VI) > Th(IV), [19] and that for N,N'-dimethyl-N,N'-dibutyl malonamide (DMDBMA) was Pu(IV), Th(IV) > U(VI) > Am(III), Pu(III). [17,18] Tetramethylmalonamide (TMMA) resin exhibited higher K d values for U(VI) than those of the other resins from HNO 3 solutions, and although the K d values for Ln(III) have also been reported, those for Th(IV) and Am(III) have not been previously reported. [14][15][16] It is reasonable to project that the small amide methyl group in the TMMA resin reduces steric hindrance around the cation binding site to account for the higher K d values that are observed.…”

Section: Introductionmentioning

confidence: 97%

“…Recently, malonamide derivatives have been covalently bonded to a polymer to produce a solid extraction resin for column chromatography. [14][15][16][17][18][19] This functionalization of a polymer matrix offers some attractive complementary features to solvent extraction, which may be particularly important for small scale or analytical operations.…”

Section: Introductionmentioning

confidence: 99%

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Studies on the Uptake and Column Chromatographic Separation of Eu, Th, U, and Am by Tetramethylmalonamide Resin

Shimada

Sulakova

Yijia

et al. 2013

Solvent Extraction and Ion Exchange

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A tetramethylmalonamide-functionalized resin (TMMA resin) has been developed and investigated for its ability to separate trivalent, tetravalent, and hexavalent actinide elements. As a fundamental study of the extraction mechanism and to design a chromatographic separation scheme, distribution coefficients (K d ) for partitioning of Eu(III), Th(IV), U(VI), and Am(III) onto the resin from HNO 3 , NaNO 3 , HCl, and NaCl solutions have been determined. The partitioning of HNO 3 onto the resin was also evaluated. The order of the K d values was Th(IV) > U(VI) > Am(III) = Eu(III) in all tested solutions. The competition between metal extraction and HNO 3 extraction was confirmed by the extraction data and FT-IR spectra. The loading capacities of Eu(NO 3 ) 3 and UO 2 (NO 3 ) 2 at 3 M HNO 3 , determined by a dynamic method with TMMA resin (TMMA in the resin was 2.05 mmol/g), were 0.83 mmol/g and 1.6 mmol/g, respectively, implying that M:TMMA stoichiometry was 1:2 for Eu(III) and 1:1 for U. Because the K d values for Th(IV) and U(VI) were greater than 100 in all solutions tested, the influence of organic acids on the K d values of Th(IV) and U(VI) from 3 M and 0.01 M HNO 3 solutions was studied to identify potential stripping agents. The effects of Na, Al, K, Ca, Cr, Ni, and Fe (potential constituents of low-level radioactive waste) on the K d values of Am(III) were also studied. Although the K d values for Am(III) decreased in the presence of 0.01 M Fe(III), the influence of the other ions was negligible. Based on these fundamental experimental results, an extractive chromatographic scheme for actinide isolation was designed and demonstrated.

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A novel malonamide grafted polystyrene-divinyl benzene resin for extraction, pre-concentration and separation of actinides

Cited by 50 publications

References 29 publications

Characteristics of uranium recovery from phosphoric acid by an aminophosphonic resin and application to wet process phosphoric acid

Characteristics of uranium recovery from phosphoric acid by an aminophosphonic resin and application to wet process phosphoric acid

First example of diglycolamide-grafted resins: synthesis, characterization, and actinide uptake studies

Studies on the Uptake and Column Chromatographic Separation of Eu, Th, U, and Am by Tetramethylmalonamide Resin

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