Selective preconcentration of uranium on chitosan stearoyl thiourea prior to its spectrophotometric determination

Orabi, Ahmed H.; Atrees, Mohamed S.; Salem, Hend

doi:10.1080/01496395.2018.1445113

Cited by 19 publications

(8 citation statements)

References 63 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: 86%

“…Quantitative desorption of U(VI) and Th(IV) was performed with various eluting agents such as hydrochloric acid, ammonium oxalate, ammonium carbonate, and nitric acid which form stable complexes with uranium and thorium[22,55, 57,84,85]. For this purpose, 10 mL aliquots of each eluting agent (1 M) were treated with 0.1 g portions of loaded EIR at 298 ± 1 K for 10 min.…”

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confidence: 99%

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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: 86%

mentioning

confidence: 99%

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: 87%

“…Quantitative desorption of U(VI) and Th(IV) was performed with various eluting agents such as hydrochloric acid, ammonium dihydrogen phosphate, ammonium carbonate, and hydrochloric acid which form stable complexes with uranium and thorium [32,54,69,87,88]. For this purpose, 10 mL aliquots of each eluting agent with various concentrations were treated with 0.1 g portions of loaded EIR at 298 ± 1 K for 10 min.…”

Section: Elution Studiesmentioning

confidence: 99%

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 elution process is an important process in adsorption studies because it enhances the economic value of the adsorption process . Different eluting agents such as hydrochloric, nitric, sulfuric, were examined for uranium and thorium desorption.…”

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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Selective preconcentration of uranium on chitosan stearoyl thiourea prior to its spectrophotometric determination

Cited by 19 publications

References 63 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 Quinoline/Phenanthroline Impregnated Sugarcane Bagasse for Recovering Uranium(VI) and Thorium(IV) from their Solutions

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