Sorption efficiency of a new sorbent towards uranyl: phosphonic acid grafted Merrifield resin

Ferrah, Nacer; Abderrahim, Omar; Didi, Mohamed Amine; Villemin, Didier

doi:10.1007/s10967-011-1172-1

Cited by 36 publications

(11 citation statements)

References 31 publications

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“…The pH plays an important role in the uranium sorption on all extractants because the pH can influence the aqueous chemistry of uranium and the properties of the active sites of the sorbent (Ferrah, Abderrahim, Didi, & Villemin, 2011). The retention of uranium(VI) on Ambersep 920U SO 4 resin is studied in the pH range from 1 to 5 using 50 ml leach solution assaying 250 mg/L uranium(VI), 0.2 g resin and 150 rpm stirring speed for 3 h contact time at room temperature.…”

Section: Effect Of Phmentioning

confidence: 99%

Uranium(VI) recovery from acidic leach liquor by Ambersep 920U SO4 resin: Kinetic, equilibrium and thermodynamic studies

Cheira

Atia

Kouraim

2017

Journal of Radiation Research and Applied Sciences

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The kinetic, equilibrium and thermodynamic characteristics of U(VI) recovery by the strong base anion exchange resin Ambersep 920U SO 4 from Gabal Gattar sulfate leach liquor have been determined. Batch sorption experiments are performed to evaluate the optimum conditions at pH2, 200 mg resin dose for 120 min contact time at room temperature. The maximum sorption capacity reaches to 58 mg/g at 298 K. The kinetics data are well described by the pseudo-second-order kinetic model at different uranium concentrations. The experimental results obtained at various temperatures showed that the adsorption pattern on the studied resin has followed Langmuir isotherm model. The evaluation of thermodynamic parameters (free energy change DG, enthalpy change DS, entropy change DH, activation energy E a and sticking probability S*) indicate that the adsorption process is spontaneous in nature, endothermic, randomness and chemisorptions. Uranium(VI) can be completely desorbed from the loaded resin using 0.5 M HNO 3 solution. Finally, the optimized factors have been carried out for uranium(VI) recovery from G. Gattar leach liquor.

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Section: Effect Of Phmentioning

confidence: 99%

Uranium(VI) recovery from acidic leach liquor by Ambersep 920U SO4 resin: Kinetic, equilibrium and thermodynamic studies

Cheira

Atia

Kouraim

2017

Journal of Radiation Research and Applied Sciences

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“…The pH plays an important role in the uranium and thorium sorption on all extractants because the pH can influence the aqueous chemistry of uranium, thorium and the properties of the active sites of the sorbent . The retention of uranium and thorium on prepared ISCB is studied in the pH range from 1 to 12 using 25 mL solutions assaying 150 mg/Land 200 mg · L –1 Th respectively, 0.02 g dose and 200 rpm stirring speed for 20 min.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Quinoline/Phenanthroline Impregnated Sugarcane Bagasse for Recovering Uranium(VI) and Thorium(IV) from their Solutions

Bakry

2020

Zeitschrift anorg allge chemie

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This present research aims to synthesize and investigate the adsorption potential of sugarcane bagasse (SCB) impregnated with 8 hydroxy quinolone 8-(HQ) and 1,10 phenethroline (phen) to prepare impregnated sugarcane bagasse (ISCB) for removal U VI and Th IV . The effects of the operating parameters, including pH of the solution, contact time, initial concentration, temperature, dose and interfering ions on the adsorption efficiency were investigated to identify an optimal condition. The characterization of SEM-EDX and FTIR analyses shows that ISCB has a porous structure and carbon-containing func-* A. R. Bakry E-Mail: Bakrynma@yahoo.com [a] Nuclear Materials Authority

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“…11 shows the extraction yield as a function of initial pH, where the extraction efficiency increases rapidly with increasing initial pH. It reaches a maximum value around pH 7.0 for fine particles and pH 6.0 for the large particles; this is due to the favorable conditions for the complex formation of neodymium with particles magnetic in this pH [33].The progressive decrease in the retention of neodymium ions at low pH is due to the competition of hydrogen with neodymium for sorption sites on particles magnetic and to the protonation of the active groups [21,22,33]. The dépro-tonation during the increase of pH returns the favorable approach of the cations [34].…”

Section: Effect Of Initial Phmentioning

confidence: 97%

Neodymium(III) removal by functionalized magnetic nanoparticles

Miraoui

Didi

Villemin

2015

J Radioanal Nucl Chem

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In this paper, neodymium removed by liquidsolid extraction is made by magnetic nanoparticles functionalized by the poly(aminoethylene N-methyl 1-formic acid, 1-phosphonic acid) (PAEMFP), with two different sizes. For a quantity of 0.01 g of magnetic particles some parameters were studied. Optimal extraction yield was achieved in a initial pH equal at 7.0 for fine particles and pH 6.0 for the large particles. The experimental capacity obtained was 25 mg g -1 for larges particles and 23 mg g -1 for fines particles. The quantitative elution study of neodymium(III) can be realized with acetic acid 0.5 mol L -1 after 120 min of shaking for two sizes.

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Sorption efficiency of a new sorbent towards uranyl: phosphonic acid grafted Merrifield resin

Cited by 36 publications

References 31 publications

Uranium(VI) recovery from acidic leach liquor by Ambersep 920U SO4 resin: Kinetic, equilibrium and thermodynamic studies

Uranium(VI) recovery from acidic leach liquor by Ambersep 920U SO4 resin: Kinetic, equilibrium and thermodynamic studies

Synthesis of Quinoline/Phenanthroline Impregnated Sugarcane Bagasse for Recovering Uranium(VI) and Thorium(IV) from their Solutions

Neodymium(III) removal by functionalized magnetic nanoparticles

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