Uranium extraction by sulfonated mesoporous silica derived from blast furnace slag

El‐Magied, Mahmoud O. Abd; Dhmees, Abdelghaffar S.; El-Hamid, Abd Allah M. Abd; Eldesouky, Ekramy M.

doi:10.1016/j.jnucmat.2018.06.034

Cited by 47 publications

(13 citation statements)

References 30 publications

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“…Alternatively, inorganic materials have been also investigated, including clays (Gladysz-Plaska et al, 2018;Olivelli et al, 2013) metal oxides (Yin et al, 2017), mesoporous silica under their raw form (Guibal et al, 1995), chemically modified (El-Magied et al, 2018;Mazario et al, 2019;Yin et al, 2015;Yuan et al, 2011), or functionalized by chemical anchoring (Awual, 2019). Composite materials, including, metal-organic frameworks have also been designed for metal binding.…”

Section: Introductionmentioning

confidence: 99%

A new route for manufacturing poly(aminophosphonic)-functionalized poly(glycidyl methacrylate)-magnetic nanocomposite - Application to uranium sorption from ore leachate

Galhoum

Eisa

Elsayed

et al. 2020

Environmental Pollution

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A high-energy ball milling of magnetite nanoparticles with amino-phosphonic functionalized poly(glycidyl methacrylate) polymer is used for manufacturing a highly efficient magnetic sorbent for U(VI) sorption from aqueous solutions. The Uranyl ions were adsorbed through the binding with amine and phosphonic groups as confirmed by Fourier Transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. The maximum sorption capacity (up to 270 mg U g À1) occurred at pH ¼ 3e4; Langmuir isotherm well describes the sorption process. Small-size particles allow achieving fast uptake (within z90 min of contact); and the kinetic profiles are modeled by the pseudo-second order rate equation. Uranium is successfully desorbed from loaded sorbent using 0.25 M NaHCO 3 solution: Sorbent can be recycled with minimal decrease in sorption and desorption efficiency for at least 6 cycles. The sorbent is efficiently used for U(VI) recovery from the acidic leachates of U-bearing ores (after precipitation pre-treatment). Sorption capacity approaches 190 mg U g À1 despite the presence of high concentrations of Fe and Si: the sorbent has a marked preference for U(VI) (confirmed by distribution ratios and selectivity coefficients).

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Section: Introductionmentioning

confidence: 99%

A new route for manufacturing poly(aminophosphonic)-functionalized poly(glycidyl methacrylate)-magnetic nanocomposite - Application to uranium sorption from ore leachate

Galhoum

Eisa

Elsayed

et al. 2020

Environmental Pollution

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“…However, sorption processes have retained more attention for the treatment of low-concentration effluents. Uranium sorption was reported using biosorbents [13][14][15][16], chelating resins [17][18][19][20], and ion-exchange resins [21][22][23][24][25][26], and functionalized inorganic supports [27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Hamza

Mubark

Wei

et al. 2020

Gels

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The necessity to recover uranium from dilute solutions (for environmental/safety and resource management) is driving research towards developing new sorbents. This study focuses on the enhancement of U(VI) sorption properties of composite algal/Polyethylenimine beads through the quaternization of the support (by reaction with glycidyltrimethylammonium chloride). The sorbent is fully characterized by FTIR, XPS for confirming the contribution of protonated amine and quaternary ammonium groups on U(VI) binding (with possible contribution of hydroxyl and carboxyl groups, depending on the pH). The sorption properties are investigated in batch with reference to pH effect (optimum value: pH 4), uptake kinetics (equilibrium: 40 min) and sorption isotherms (maximum sorption capacity: 0.86 mmol U g−1). Metal desorption (with 0.5 M NaCl/0.5 M HCl) is highly efficient and the sorbent can be reused for five cycles with limited decrease in performance. The sorbent is successfully applied to the selective recovery of U(VI) from acidic leachate of uranium ore, after pre-treatment (cementation of copper, precipitation of rare earth elements with oxalate, and precipitation of iron). A pure yellow cake is obtained after precipitation of the eluate.

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“…The value of saturation capacity determined from Langmuir isotherm model was 71.94 mg/g at room temperature which is near to the experimental value of 71.2 mg/g. The tested modified AC showed high sorption capacity compared to other adsorbents [34][35][36][37][38][39][40]. From Langmuir assumptions, thorium uptake has occurred on a homogeneous surface as a monolayer and all the metal binding sites are energetically the same [41].…”

Section: Adsorption Equilibrium Studiesmentioning

confidence: 92%

Thorium ions recovery using activated carbon modified with triphenyl phosphine oxide: kinetic and equilibrium studies

Yousef

Bakry

2019

SN Appl. Sci.

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Activated carbon (AC) modified with triphenyl phosphine oxide (TPPO) was tested for thorium(IV) adsorption. Different factors affecting the adsorption process such as pH, contact time, modified AC dose, initial thorium concentration, triphenyl phosphine oxide (TPPO) concentration and temperature were investigated to optimize Th(IV) adsorption operating conditions. Kinetic and equilibrium studies of the adsorption process have been studied. The obtained most favorable conditions for Th(IV) adsorption were: pH 3.6, 40 min contact time, 0.5 g modified AC dose, 0.02 M TPPO in toluene and 400 mg/L of thorium concentration at room temperature. The maximum sorption capacity according to Langmuir isotherm reached 71.94 mg/g for modified AC. Adsorption kinetics obeys pseudo-second order kinetic model. Thorium(IV) was efficiently desorbed from the loaded composite using 0.5 M H 2 SO 4 solution. The optimized factors have been carried out to recover thorium(IV) from Abu Rusheid leach liquor, south Eastern Desert, Egypt.

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Uranium extraction by sulfonated mesoporous silica derived from blast furnace slag

Cited by 47 publications

References 30 publications

A new route for manufacturing poly(aminophosphonic)-functionalized poly(glycidyl methacrylate)-magnetic nanocomposite - Application to uranium sorption from ore leachate

A new route for manufacturing poly(aminophosphonic)-functionalized poly(glycidyl methacrylate)-magnetic nanocomposite - Application to uranium sorption from ore leachate

Quaternization of Composite Algal/PEI Beads for Enhanced Uranium Sorption—Application to Ore Acidic Leachate

Thorium ions recovery using activated carbon modified with triphenyl phosphine oxide: kinetic and equilibrium studies

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