Equilibrium and kinetic studies on uranium sorption from aqueous sulphate medium using tri-n-octylamine impregnated resin

Mosleh, Mahmoud A.; El-Hakim, Elham H.; Ahmed, Anwar Z.; El-Ghany, Mohamed S. Abd; El‐Didamony, Akram M.

doi:10.1080/03067319.2020.1766038

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…In most cases, the first step in the recovery process from these mineral or material resources consists of leaching steps (Abhilash and Pandey, 2013;Zhang et al, 2016), followed by concentration and separation processes, such as solvent extraction (Wu et al, 2018) (including extractant impregnated sorbents (Mosleh et al, 2020), and membranes), precipitation (Borai et al, 2016;Hamza et al, 2019) (eventually coupled to bioreduction, (You et al, 2021)). The sorption of uranium was investigated using different types of sorbents such as ion exchange resins (Ang et al, 2017;Smirnov et al, 2017), chelating resins (Ang et al, 2018;Zidan et al, 2020), mineral sorbents (Gladysz-Plaska et al, 2018;Liao et al, 2019), biosorbents (Dabbagh et al, 2018;Hamza et al, 2021;Nuhanovic et al, 2019;Ozudogru and Merdivan, 2020), biobased char (Ahmed et al, 2021), or iron-based materials (Chen et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

U(VI) and Th(IV) recovery using silica beads functionalized with urea- or thiourea-based polymers – Application to ore leachate

Hamza

Wei

Khalafalla

et al. 2022

Science of The Total Environment

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Section: Introductionmentioning

confidence: 99%

U(VI) and Th(IV) recovery using silica beads functionalized with urea- or thiourea-based polymers – Application to ore leachate

Hamza

Wei

Khalafalla

et al. 2022

Science of The Total Environment

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“…Therefore, 5.0 g of MC particles were mixed with 5.0 g of GMA in a 500 mL round-bottomed flask equipped with a condenser, then 100 mL of polyvinyl alcohol solution (1%, w/w) was poured into the flask. Three mL of isopropyl alcohol and 25 mL of cyclohexane were then added to the flask under precipitation [2], electrocoagulation [3], reduction-assisted processes [4,5], solvent extraction [6,7], impregnated resins [8], depending on the levels of concentrations and the complexity of the effluent. Sorption properties have retained great attention more specifically for the treatment of dilute solutions using mineral surfaces [9][10][11], silica [12], functionalized silica [13], biopolymer-silica composite [14], and metal-organic framework [15,16].…”

Section: Synthesis Of Magnetic Chitosan/gma Compositementioning

confidence: 99%

Effect of agitation mode (mechanical, ultrasound and microwave) on uranium sorption using amine- and dithizone-functionalized magnetic chitosan hybrid materials

Elwakeel

Hamza

Guibal

2021

Chemical Engineering Journal

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Magnetic chitosan nanoparticles, activated by glycidyl methacrylate, can be functionalized by grafting dieth-ylenetriamine (DETA) and dithizone for improving U(VI) sorption at pH around 5. The physicochemical prop-erties of the materials have been characterized by a wide variety of analytical techniques. Uranyl sorption increases with the pH (progressive deprotonation of amine and sulfur groups). Uptake kinetics are controlled by the agitation mode: the equilibrium time is reduced while using ultrasonic treatment (especially at highest frequency: 80 kHz): the cavitation effect improves the accessibility to internal reactive groups (sorption capacity is increased). The diffusivity coefficient is increased by 4-5 times. In the case of microwave, the sorption capacity is significantly reduced (especially for R-Dithizone, down to 0.8 mmol U g − 1 ) because of temperature increase, which limits the sorption (exothermic mechanism). Mass transfer is tremendously enhanced: equilibrium time is less than 60 s (30 min for ultrasonic treatment and 120 min with mechanical agitation). Sorption capacity at monolayer saturation (Langmuir) decreases with increasing the temperature from 2.20 to 1.74 mmol U g − 1 for R-Amine (from 1.77 to 1.22 mmol U g − 1 for R-Dithizone). The sorption enthalpy is close to − 19.7 kJ mol − 1 for R-Amine (with positive entropy change, ΔS • ) and − 34.2 kJ mol − 1 for R-Dithizone (negative ΔS • ). Metal desorption is highly efficient using 0.3 M Na 2 CO 3 /0.1 M H 2 O 2 solution. Metal desorption is instantaneous (less than 1 min) and complete when using microwave treatment. The ultrasonic treatment allows improving desorption efficiency and decreasing the concentration of the eluent compared with mechanical agitation. The process is successfully applied for uranyl separation from the leachates of marine sediments, especially in the presence of Complexon III (masking agent).

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Preparation and characterization of modified anion exchange resin for uranium adsorption: estimation of nonlinear optimum isotherm, kinetic model parameters, error function analysis and thermodynamic studies

Salem

El-Maghrabi

2021

Journal of Dispersion Science and Technology

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Equilibrium and kinetic studies on uranium sorption from aqueous sulphate medium using tri-n-octylamine impregnated resin

Cited by 3 publications

References 38 publications

U(VI) and Th(IV) recovery using silica beads functionalized with urea- or thiourea-based polymers – Application to ore leachate

U(VI) and Th(IV) recovery using silica beads functionalized with urea- or thiourea-based polymers – Application to ore leachate

Effect of agitation mode (mechanical, ultrasound and microwave) on uranium sorption using amine- and dithizone-functionalized magnetic chitosan hybrid materials

Preparation and characterization of modified anion exchange resin for uranium adsorption: estimation of nonlinear optimum isotherm, kinetic model parameters, error function analysis and thermodynamic studies

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