Selective solid-phase extraction of U(VI) by amine functionalized glycidyl methacrylate

Sadeek, Sadeek A.; El‐Magied, Mahmoud O. Abd; El-Sayed, Mohamed A.; Amine, Maisa M.

doi:10.1016/j.jece.2013.12.015

Cited by 34 publications

(18 citation statements)

References 37 publications

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“…Copolymers based on glycidyl methacrylate (2,3-epoxypropyl methacrylate) (GMA) can be an important alternative to substitute Sty-DVB copolymers [6][7][8][9][10][11][12][13][14][15] . The presence of epoxide groups in the polymeric matrix of GMA copolymers makes their functionalization easier, because the epoxide groups are very reactive 6 .…”

Section: Introductionmentioning

confidence: 99%

Glycidyl Methacrylate-ethylene Glycol Dimethacrylate Copolymers with Varied Pore Structures Prepared with Different Reaction Parameters

et al. 2020

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Copolymers based on glycidyl methacrylate (GMA) are considered attractive as sorbents because the epoxy groups can be easily converted into other groups. Studies involving the influence of the synthesis parameters on the morphological characteristics of these copolymers are scarce. This work investigates the synthesis of copolymers of poly(GMA-co-EGDMA) with different porosity degrees obtained by varying the synthesis parameters. GMA-EGDMA copolymers were synthesized by suspension polymerization employing varied conditions and characterized by measuring apparent density, surface area and pore volume distribution, optical and scanning electron microcopies, FT-IR, thermogravimetry and titration of epoxide rings. The copolymer with highest surface area and pore volume (260.4 m 2 /g and 0.5 cm 3 /g) was prepared employing cyclohexane as diluent, 80% EGDMA in monomeric composition and 100% of dilution degree. There was a relation between the epoxide content of the copolymers determined by titration and the residue content formed in the first decomposition stage.

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Section: Introductionmentioning

confidence: 99%

Glycidyl Methacrylate-ethylene Glycol Dimethacrylate Copolymers with Varied Pore Structures Prepared with Different Reaction Parameters

et al. 2020

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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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“…Diluted solutions of HCl and NaOH were used to adjust the pH of the medium. The effect of the initial metal ion concentrations on the adsorption was carried out at different temperatures (25,30,35 and 40 • C).…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…The equilibrium was attained within 20 min for both metal ions. The adsorption data were treated according to pseudo-first (Equation (4)) and pseudo-second-order (Equation (5)) kinetic models [30,31].…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Fabrication of Silica Microspheres (HB/A@SI-MNS) for Hafnium and Zirconium Recovery from Zirconyl Leach Liquor

El‐Magied

Salem

Daher

et al. 2018

Colloids and Interfaces

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This work describes the synthesis of silica microspheres using sodium silicate obtained as a byproduct in the production of Egyptian Rosetta zircon concentrate. The obtained mesoporous silica microspheres were further modified with aminopropyltriethoxy silane and 2,4-Dihydroxybenzaldehyde to produce Schiff's base silica sorbent (HB/A@Si-MNS). HB/A@Si-MNS was used for the selective extraction of hafnium from zircon mineral leach liqueur. The fabrication process and surface properties of HB/A@Si-MNS were confirmed by the means of X-ray Fluorescence (XRF), scanning electron microscop (SEM), energy depressive X-ray (EDX), Fourier-transform infrared spectroscopy (FT-IR), and elemental analysis. The uptake behavior of HB/A@Si-MNS towards Zr(IV) and Hf(IV) ions were studied under different experimental conditions. Adsorption curves indicate that the uptake of Zr(IV) and Hf(IV) on HB/A@Si-MNS is a spontaneous, endothermic monolayer system controlled by intraparticle diffusion. Elution efficiencies were found to be 94% and 98% for Zr(IV) and Hf(IV), respectively. The regenerated HB/A@SI-MNS showed uptake capacity comparable to that of fresh ones over 3 cycles. The results of the extraction of Hf(IV) than Zr(IV) from Rosetta zircon concentrate show that HB/A@SI-MNS has a preferential selectivity towards Hf(IV) than Zr(IV). Therefore, the studied material may be promising for the selective separation of Hf(IV) from Zr(IV).

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Selective solid-phase extraction of U(VI) by amine functionalized glycidyl methacrylate

Cited by 34 publications

References 37 publications

Glycidyl Methacrylate-ethylene Glycol Dimethacrylate Copolymers with Varied Pore Structures Prepared with Different Reaction Parameters

Glycidyl Methacrylate-ethylene Glycol Dimethacrylate Copolymers with Varied Pore Structures Prepared with Different Reaction Parameters

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

Fabrication of Silica Microspheres (HB/A@SI-MNS) for Hafnium and Zirconium Recovery from Zirconyl Leach Liquor

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