Synthesis, characterization, and application of polystyrene adsorbents containing tri-n-butylphosphate for solid-phase extraction of uranium (VI) from aqueous nitrate solutions

Mahfouz, Mohammad G.; Killa, H. M.; Sheta, Mohamed E.; Moustafa, A. H.; Tolba, Ahmad A.

doi:10.1007/s10967-014-3214-y

Cited by 15 publications

(5 citation statements)

References 51 publications

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“…The adsorption properties of hybrid microspheres result from their porous structures which develop during the polymerization reaction. The amounts, shapes and sizes of pores depend on pore-forming diluents applied to expand the polymer matrix, however, the major factor in developing the surface area is the crosslinking agent (the higher amount of crosslinker, the higher the surface area) [ 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Physicochemical and Adsorption Characteristics of Divinylbenzene-co-Triethoxyvinylsilane Microspheres as Materials for the Removal of Organic Compounds

et al. 2021

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In this work, organic-inorganic materials with spherical shape consisting of divinylbenzene (DVB) and triethoxyvinylsilane (TEVS) were synthesized and investigated by different complementary techniques. The obtained microspheres may be applied as sorbent systems for the purification of organic compounds from water. The hybrid microspheres combine the properties of the constituents depending on the morphologies and interfacial bonding. In this work, the influence of the molar ratio composition of crosslinked monomer (DVB) and silane coupling agent (TEVS) (DVB:TEVS molar ratios: 1:2, 1:1 and 2:1) on the morphology and quality of organic-inorganic materials have been examined. The materials were analysed using small angle X-ray scattering (SAXS) analysis, low-temperature nitrogen sorption, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) to provide information on their structural and surface properties. Moreover, thermal analysis was performed to characterize the thermal stability of the studied materials and the adsorbent-adsorbate interactions, while adsorption kinetic studies proved the utility of the synthesized adsorbents for water and wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Physicochemical and Adsorption Characteristics of Divinylbenzene-co-Triethoxyvinylsilane Microspheres as Materials for the Removal of Organic Compounds

et al. 2021

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“…Formation of caverns and channels, their amount and size depend on the inert material (poreforming solvents) used to expand the matrix such as ethanol, toluene, xylene etc. (Mahfouz et al 2014;Ali et al 2016). The main factor influencing the developing the inner surface area is application of crosslinkers.…”

Section: Introductionmentioning

confidence: 99%

Chemical modification of commercial St-DVB microspheres and their application for metal ions removal

Podkościelna

Kołodyńska

2019

Adsorption

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Multistage modification of commercially available styrene with divinylbenzene (St-DVB) microspheres is presented. The new type of modification introducing very attractive thiol (-SH) groups on the surface of polymeric matrices was made. In order to obtain thiol derivatives, the parent St-DVB microspheres were treated by H 2 SO 4 with addition of oleum and then conversion of sulfonic groups to chloride acylsulfonic groups in the presence of PCl 5 and POCl 3 was carried out. Finally, the reduction of modified microspheres by using SnCl 2 ·2H 2 O was conducted. The thiol groups content (elemental analysis), thermal properties (TG/DTG, DSC analysis) as well as the swelling characteristics of the functional microspheres were examined. The novel material St-DVB-SH was compared with commercial ion exchanger Ambersept GT74 to removal of heavy metal ions: Cu(II), Zn(II), Cd(II), Pb(II) and Ni(II). In order to investigate the applicability of the obtained microspheres for heavy metal ions removal, the batch method was used. On the basis of studies, the optimal pH of the solution and microspheres dose was determined. Both for St-DVB-SH and Ambersept GT74, the Langmuir and Freundlich isotherm models are used to represent adsorption equilibria. The pseudo first order, pseudo second order and intraparticle diffusion kinetic models were used to fit the adsorption kinetic data. Additionally, dynamic adsorption tests were carried out in order to establish bed exhaustion. Results of a comprehensive comparative analysis indicate that the new synthesized material St-DVB-SH is very effective for removal of heavy metal ions studied.

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“…Sorption processes are usually preferred for the treatment of dilute effluents . A great diversity of sorbents has been tested for the recovery of uranium and REEs: clays and zeolite, carbon‐based sorbents, ion‐exchange and chelating resins, extractant impregnated resin, biosorbents; composite clay/biopolymer sorbents …”

Section: Introductionmentioning

confidence: 99%

“…Sorption processes are usually preferred for the treatment of dilute effluents. 14,15 A great diversity of sorbents has been tested for the recovery of uranium and REEs: clays and zeolite, [16][17][18][19][20][21][22][23][24] carbon-based sorbents, [25][26][27][28] ion-exchange and chelating resins, [29][30][31][32][33][34] extractant impregnated resin, 35 biosorbents; [36][37][38][39][40][41][42][43][44][45][46][47][48][49] composite clay/biopolymer sorbents. 50 Synthetic polymers and biopolymers have retained much attention from the research community in the field of metal recovery, profiting from their physical and chemical versatilities.…”

Section: Introductionmentioning

confidence: 99%

Magnetic glutamine‐grafted polymer for the sorption of U(VI), Nd(III) and Dy(III)

Hamza

Abdel‐Rahman

Guibal

2018

J of Chemical Tech & Biotech

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BACKGROUND The nuclear power industry and other high‐tech industries require increasing quantities of uranium and rare‐earth elements (REEs). There is a need for materials that can competitively recover these metals from ore leachates (such as produced in the leaching of Egyptian ores). RESULTS A sorbent based on the chemical grafting of glutamine moieties on a magnetic polyacrylonitrile support was synthesized: polyacrylonitrile, crosslinked with 10% divinyl benzene in the presence of magnetite, was chemically modified by a series of grafting steps to produce a magnetic polyglutamine sorbent (MGLU). The sorbent was characterized by titration, elemental analysis, X‐ray diffraction (XRD), thermogravimetric analysis, Fourier‐transform infra‐red (FTIR) spectrometry and scanning electron microscopy (SEM). The sorption properties were tested as a function of pH; the sorption isotherms were modeled using the Langmuir equation (maximum sorption capacities: 2 mmol U g‐1 and up to 3.5 mmol g‐1 for Nd(III) and Dy(III)). The equilibrium is achieved within 1 h of contact. Metal desorption and sorbent recycling are highly efficient using acidic solutions; sorption/desorption performance remains stable for a minimum of 5 cycles. MGLU was tested for metal binding in multi‐metal solutions at different pH values. CONCLUSION This sorbent could be used for the recovery of REEs and uranium from simulated ore leachates. © 2017 Society of Chemical Industry

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Synthesis, characterization, and application of polystyrene adsorbents containing tri-n-butylphosphate for solid-phase extraction of uranium (VI) from aqueous nitrate solutions

Cited by 15 publications

References 51 publications

Physicochemical and Adsorption Characteristics of Divinylbenzene-co-Triethoxyvinylsilane Microspheres as Materials for the Removal of Organic Compounds

Physicochemical and Adsorption Characteristics of Divinylbenzene-co-Triethoxyvinylsilane Microspheres as Materials for the Removal of Organic Compounds

Chemical modification of commercial St-DVB microspheres and their application for metal ions removal

Magnetic glutamine‐grafted polymer for the sorption of U(VI), Nd(III) and Dy(III)

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