Evaluation of adsorption behavior for U(VI) and Nd(III) ions onto fumarated polystyrene microspheres

Elsalamouny, Ahmed R.; Desouky, Osman A.; Mohamed, S. M.; Galhoum, Ahmed A.; Guibal, Eric

doi:10.1007/s10967-017-5389-5

Cited by 18 publications

(8 citation statements)

References 46 publications

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“…The values of ΔS are 75.95 J mol −1 K −1 for U and 69.23 J mol −1 K −1 for Th. Negative Gibbs free energy ΔG value (− 32.06 kJ mol −1 for U and − 30.9 kJ mol −1 for Th) demonstrated the spontaneous property of this adsorption [82][83][84].…”

Section: Effect Of Temperature (Thermodynamics Studies)mentioning

confidence: 87%

A new extractant impregnated resin for separation of traces of uranium and thorium followed by their spectrophotometric determination in some geological samples

et al. 2019

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A new extractant-impregnated resin, alizarin red S -impregnated XAD-2010, is used as an adsorbent to separate and preconcentrate U(VI) and Th(IV) ions prior to their spectrophotometric determination. Various instrumental techniques such as elemental analysis, FTIR, and SEM analysis were employed for full characterization of the synthetic extractant. Optimization of the adsorption and elution conditions of U(VI) and Th(IV) ions using synthesized alizarin red S -impregnated XAD-2010 were studied. Langmuir isotherm model has the best fitting experimental data with a maximum adsorption capacity of 20.2 mg g −1 for U(VI) and 18.25 mg g −1 for Th(IV). The adsorption process of each metal ion by synthesized alizarin red S -impregnated XAD-2010 showed an exothermic pseudo-second-order adsorption process. The tolerance limits for several metal ions on alizarin red S -impregnated XAD-2010 were calculated, giving high tolerance limit. The optimized method was applied on international certified samples and different rock types bearing thorium and uranium with accurate results.

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Section: Effect Of Temperature (Thermodynamics Studies)mentioning

confidence: 87%

A new extractant impregnated resin for separation of traces of uranium and thorium followed by their spectrophotometric determination in some geological samples

et al. 2019

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“…The values of ΔS are 66.05 J mol −1 K −1 for U and 67.62 J mol −1 K −1 for Th. Negative Gibbs free energy ΔG value (− 32.17 kJ mol -1 for U and − 32.63 kJ mol -1 for Th) demonstrated the spontaneous property of this adsorption [47,[85][86][87].…”

Section: Effect Of Temperature (Thermodynamics Studies)mentioning

confidence: 88%

Amberlite XAD-2010 Impregnated with Chrome Azurol S for Separation and Spectrophotometric Determination of Uranium and Thorium

2019

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A new extractant-impregnated resin (EIR), chrome azurol S-impregnated on XAD-2010, is used as an adsorbent to separate and preconcentrate U(VI) and Th(IV) ions prior to their spectrophotometric determination. Various instrumental techniques such as elemental analysis, FTIR, and SEM analysis were employed for full characterization of the synthetic extractant. Optimization of the adsorption and elution conditions of U(VI) and Th(IV) ions using synthesized chrome azurol S-impregnated XAD-2010 were studied. Langmuir isotherm model has the best fitting experimental data with a maximum adsorption capacity of 23.8 mg g −1 for U(VI) and 25.4 mg g −1 for Th(IV). The adsorption process of each metal ion using synthesized chrome azurol S-impregnated XAD-2010 showed an exothermic pseudo-second-order adsorption process. High tolerance limits for several studied metal ions on chrome azurol S-impregnated XAD-2010 were observed. The optimized method was applied on an international certified samples and different rock types bearing thorium and uranium with accurate results.

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“…The 1 H NMR spectrum was recorded at 400 MHz in DMSO-d 6 using a JEOL ECA-500 II spectrometer (JEOL, Tokyo, Japan) (at Analytical Lab, from Mansoura University, Egypt). 31 PNMR spectrum was recorded at 162 MHz in DMSO-d 6 using a BRUKER spectrometer (JEOL, Tokyo, Japan) (at Analytical Lab, from Zagazig University, Egypt). The FTIR spectra were directly obtained, in the wavenumber range 4000-400 cm − 1 , using a ThermoFisher Nicolet IS10 (Waltham, MA, USA spectrometer) (at Analytical Lab, from Mansoura University, Egypt).…”

Section: Characterization Of Materialsmentioning

confidence: 99%

“…The structural and functional characteristics of the three α-aminophosphonate derivatives are investigated by elemental analysis, FTIR, 1 H NMR, 31 P NMR, BET, DLS, TGA, and pH PZC . Uranium sorption properties are investigated in batch.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of α-aminophosphonate based sorbents – Influence of inserted groups (carboxylic vs. amine) on uranyl sorption

Rashad

Elsayed

Galhoum

et al. 2021

Chemical Engineering Journal

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A one-pot synthesis procedure is designed for preparing three α-aminophosphonates (R-H, R-COOH, and R-NH 2 ); through the reaction of amine precursors (aniline, anthranilic or o-phenylene diamine, respectively) with salicylaldehyde and triphenylphosphite, under controlled conditions. These materials are first characterized by elemental analysis, FTIR, 1 H NMR, 31 P NMR, BET, DLS, pH zpc , TGA and titration. In a second step, the sorption properties are compared for U(VI) recovery from mildly acidic solutions. At the optimum pH (i.e., pH 4) the sorbents can be ranked according the series: R-H (1.057 mmol U g − 1 ) > R-NH 2 (0.746 mmol U g − 1 ) > R-COOH (0.533 mmol U g − 1 ). The isotherms are fitted by the Langmuir equation. Uranium uptake is relatively fast: under selected experimental conditions, the equilibrium is reached within 90 min of contact. The kinetic profiles are indistinctly fitted by the model of resistance to intraparticle diffusion and the pseudo-first order rate equation.The study of sorption thermodynamics shows substantial changes between the sorbents: uranyl uptake is endothermic with R-H and R-NH 2 sorbents, while the reaction is exothermic with R-COOH sorbent. The diversity in functional groups and the speciation of uranyl in sulfuric acid solutions induce metal-binding through a combination of chelation and anion-exchange mechanisms (in function of pH). Sodium bicarbonate solutions achieve complete desorption of uranium from loaded-sorbents; the resins can be recycled for a minimum of 4-5 cycles with limited loss in efficiencies. The successful application of these resins for uranium recovery from acidic ore leachates demonstrates their promising properties for valorization of low-grade ores.

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Evaluation of adsorption behavior for U(VI) and Nd(III) ions onto fumarated polystyrene microspheres

Cited by 18 publications

References 46 publications

A new extractant impregnated resin for separation of traces of uranium and thorium followed by their spectrophotometric determination in some geological samples

A new extractant impregnated resin for separation of traces of uranium and thorium followed by their spectrophotometric determination in some geological samples

Amberlite XAD-2010 Impregnated with Chrome Azurol S for Separation and Spectrophotometric Determination of Uranium and Thorium

Synthesis of α-aminophosphonate based sorbents – Influence of inserted groups (carboxylic vs. amine) on uranyl sorption

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