Studies on the recovery of Th(IV) ions from nitric acid solutions using amino-magnetic glycidyl methacrylate resins and application to granite leach liquors

El‐Magied, Mahmoud O. Abd; Tolba, Ahmad A.; El-Gendy, Hassan S.; Zaki, Salah A.; Atia, Asem A.

doi:10.1016/j.hydromet.2016.12.011

Cited by 40 publications

(15 citation statements)

References 28 publications

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“…However, the ∆G • value becomes more and more negative with the increase in temperature, indicating that the extent of spontaneity is proportional to the temperature and, therefore, higher temperature favors the sorption process for metal ions. The positive value of ∆H • shows the endothermic nature of the adsorption process, confirming that the intensity of the sorption process is enhanced at higher temperatures [26][27][28]. The positive value of ∆S • confirms the affinity of the sorbent for uranium ions and suggests the increased randomness at the solid/solution interface during the sorption process.…”

Section: Langmuir Isothermssupporting

confidence: 53%

“…After attaining the equilibrium, the filtrates were analyzed to determine the concentration of the remaining U(VI) ions. The adsorption capacity, q e (mg/g) and percent of uranium removal from the solution, removal (%), were calculated by the following equations [25,26].…”

Section: Adsorption Measurements Using the Batch Methodsmentioning

confidence: 99%

“…It also states that the maximum sorption responds to a saturated monolayer of metal ions on the adsorbent surface, that there is no transmigration of the adsorbate in the adsorbent surface, and that sorption in an active site is independent of whether the adjacent sites are occupied or not [26][27][28]. The adsorption isotherms, obtained at 25, 35, 45 and 55 • C, were plotted according to the Langmuir model (Equation (6)), and the data obtained are provided in Figure 3.…”

Section: Langmuir Isothermsmentioning

confidence: 99%

“…The Temkin isotherm assumes that the heat of sorption of all the sorbates in the layer decreases linearly with coverage due to adsorbent-adsorbate interactions, and that the sorption process is characterized by a uniform distribution of binding energies, up to some maximum binding energy [26][27][28]. This model is expressed as Equations (14) and (15).…”

Section: Temkin's Modelmentioning

confidence: 99%

“…The rate-limiting step results from one of the above steps or a combination of them. To gain insight into the sorption kinetics, the dataset time effect was used in the modeling exercise and the results obtained from several models are discussed below [7,[26][27][28].…”

Section: Contact Timementioning

confidence: 99%

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Decontamination of Uranium-Polluted Groundwater by Chemically-Enhanced, Sawdust-Activated Carbon

El‐Magied

Mohammaden

El-Aassy

et al. 2017

Colloids and Interfaces

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Abstract:The preparation of highly efficient and low-cost activated carbon from sawdust was achieved for the treatment of uranium-contaminated groundwater. The adsorption properties of the synthesized activated carbon, as well as their ability to be reused, were assessed. The obtained results demonstrated that sawdust activated carbon (SDAC) and its amine form (SDACA) had high affinity towards uranium ions at pH values of 4.5 and 5 for SDAC and SDACA, respectively. The experimental results showed that the maximum adsorption capacity of uranium was 57.34 and 76.7 mg/g for SDAC and SDACA, respectively. A maximum removal efficiency of 89.72% by SDAC and 99.55% by SDACA were obtained at a solid/liquid ratio of 8 mg/mL. The removal mechanism of uranium by SDAC and SDACA was suggested due to interaction with the amine and carboxylic groups. The validation of the method was verified through uranium separation from synthetic as well as from groundwater collected from water wells in the Wadi Naseib area, Southwestern Sinai, Egypt.

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Section: Langmuir Isothermssupporting

confidence: 53%

Section: Adsorption Measurements Using the Batch Methodsmentioning

confidence: 99%

Section: Langmuir Isothermsmentioning

confidence: 99%

Section: Temkin's Modelmentioning

confidence: 99%

Section: Contact Timementioning

confidence: 99%

See 3 more Smart Citations

Decontamination of Uranium-Polluted Groundwater by Chemically-Enhanced, Sawdust-Activated Carbon

El‐Magied

Mohammaden

El-Aassy

et al. 2017

Colloids and Interfaces

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Influence of Benzoyl Peroxide and Divinylbenzene Concentrations on the Properties of Poly(glycidyl methacrylate‐co‐divinylbenzene) Magnetic Microspheres

Formiga

Silva

Cunha

et al. 2023

Macro Reaction Engineering

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In this work, the synthesis of magnetic microspheres of poly(glycidyl methacrylate‐co‐divinylbenzene) via suspension polymerization is reported. The concentrations of divinylbenzeneand benzoyl peroxide in the microspheres synthesis are studied. The microspheres, characterized by thermal analysis , scanning electron microscopy, vibrating sample magnetometry , and light scattering detection , show good morphological control and thermal stability. This material presents a narrow size range and an appreciable fraction of superparamagnetic particles. The increase in divinylbenzene concentration can cause a decrease in the mean diameter of the microspheres. On the other hand, the increase in benzoyl peroxide concentration causes an increase in the mean diameter of the microspheres.

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Influence of Synthesis Parameters on the Magnetic, Thermal, and Morphological Properties of Poly(Glycidyl Methacrylate‐co‐Divinylbenzene)/Magnetite

Queiroz

Cunha

Silva

et al. 2023

Macro Reaction Engineering

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In this work, polymeric microspheres based on glycidyl methacrylate and divinylbenzene with magnetic properties are synthesized by the suspension polymerization technique. To obtain magnetic properties, magnetite particles modified by oleic acid are synthesized in the laboratory. The effects of stirring speed, concentration of magnetite added, and concentration of stabilizer on the particles’ properties are studied. The magnetic microspheres are characterized according their morphology, magnetite incorporation, and magnetic and thermal properties. The incorporation of iron particles is mainly affected by stirring speed during synthesis and the amount of added magnetic material. The saturation magnetization of the microspheres is affected by the content of incorporated magnetic material. The modification with oleic acid is important for incorporation of the magnetic material in the copolymer matrix. Polymeric particles with superparamagnetic behavior are obtained with spherical morphology and saturation magnetization of 7.11 (emu g−1) when employing a monomer molar ratio of 50/50, 1% poly(vinyl alcohol), 20% magnetite particles modified by oleic acid, and stirring speed of 500 rpm.

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Studies on the recovery of Th(IV) ions from nitric acid solutions using amino-magnetic glycidyl methacrylate resins and application to granite leach liquors

Cited by 40 publications

References 28 publications

Decontamination of Uranium-Polluted Groundwater by Chemically-Enhanced, Sawdust-Activated Carbon

Decontamination of Uranium-Polluted Groundwater by Chemically-Enhanced, Sawdust-Activated Carbon

Influence of Benzoyl Peroxide and Divinylbenzene Concentrations on the Properties of Poly(glycidyl methacrylate‐co‐divinylbenzene) Magnetic Microspheres

Influence of Synthesis Parameters on the Magnetic, Thermal, and Morphological Properties of Poly(Glycidyl Methacrylate‐co‐Divinylbenzene)/Magnetite

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