Synthesis and surface modification of magnetic Fe3O4@SiO2 core-shell nanoparticles and its application in uptake of scandium (III) ions from aqueous media

Salman, Ali Dawood; Juzsakova, Tatjána; Rédey, Ákos; Ibrahim, Raheek I.; Al-Mayyahi, Mohammad A.; Mohsen, Saja; Abdullah, Thamer Adnan; Domokos, Endre

doi:10.1007/s11356-020-12170-4

Cited by 25 publications

(8 citation statements)

References 60 publications

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“…The use of stronger alkaline solutions, such as 5 mol/L sodium hydroxide, can alleviate the phase separation problem to some extent because the solubility of the organic solvent in the loaded strip liquid is reduced [ 13 ]. Using NaF solutions of 2 mol/L, scandium can be completely removed from the organic phase of P204 and HEHEHP [ 38 ]. The scandium stripping technique by ScF 3 precipitation is effective, but the fluoride, because of its toxicity, could have a negative impact on the environment.…”

Section: Separation and Purification Of Rare Earth Elements Using Sxmentioning

confidence: 99%

“…Over the last few decades, researchers have put a lot of effort into purifying leaching effluents to separate scandium [ 5 , 6 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 ]. The purification took place by solvent extraction (SX), ion exchange (IX), liquid membranes, adsorption, precipitation, and co-precipitation [ 42 , 43 ].…”

Section: Introductionmentioning

confidence: 99%

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Scandium Recovery Methods from Mining, Metallurgical Extractive Industries, and Industrial Wastes

et al. 2022

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The recovery of scandium (Sc) from wastes and various resources using solvent extraction (SX) was discussed in detail. Moreover, the metallurgical extractive procedures for Sc recovery were presented. Acidic and neutral organophosphorus (OPCs) extractants are the most extensively used in industrial activities, considering that they provide the highest extraction efficiency of any of the valuable components. Due to the chemical and physical similarities of the rare earth metals, the separation and purification processes of Sc are difficult tasks. Sc has also been extracted from acidic solutions using carboxylic acids, amines, and acidic β-diketone, among other solvents and chemicals. For improving the extraction efficiencies, the development of mixed extractants or synergistic systems for the SX of Sc has been carried out in recent years. Different operational parameters play an important role in the extraction process, such as the type of the aqueous phase and its acidity, the aqueous (A) to organic (O) and solid (S) to liquid (L) phase ratios, as well as the type of the diluents. Sc recovery is now implemented in industrial production using a combination of hydrometallurgical and pyrometallurgical techniques, such as ore pre-treatment, leaching, SX, precipitation, and calcination. The hydrometallurgical methods (acid leaching and SX) were effective for Sc recovery. Furthermore, the OPCs bis(2-ethylhexyl) phosphoric acid (D2EHPA/P204) and tributyl phosphate (TBP) showed interesting potential taking into consideration some co-extracted metals such as Fe(III) and Ti(IV).

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Section: Separation and Purification Of Rare Earth Elements Using Sxmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scandium Recovery Methods from Mining, Metallurgical Extractive Industries, and Industrial Wastes

et al. 2022

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“…PEG is usually used as a coating on Fe3O4 as a protective reagent and dispersing agent (Chavan, 2019). In previous studies, Fe3O4 has been coated by several organic substances like diethylene triamine pentaacetic acid (DTPA) and oleic acid (OA) as a stable material for Fe3O4 and its functional groups have an adsorption effect on heavy metals (Salman, 2021).…”

Section: Introductionmentioning

confidence: 99%

Preparation and Application of Magnetite (Fe3O4) Nanoparticles by Co-precipitation Method for Removal Rhodamine B in Wastewater

Antarnusa

2022

IJHES

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Fe3O4 coated with PEG has been successfully synthesized using co-precipitation method to reduce RhB. From the XRD results, it can be seen that all samples are Fe3O4 with the highest Miller index at (311). The crystallinity of Fe3O4 was maintained even though PEG was added. From the SEM-TEM analysis, it can be seen that the two samples have a uniform size distribution. Then, PEG can increase the dispersibility of the sample. From the FTIR analysis it was confirmed that there was PEG content in Fe3O4. From the results of the VSM analysis, it was confirmed that the sample has nearly superparamagnetic properties with a small value. Then, Fe3O4 and Fe3O4/PEG were used to remove RhB in water by magnetic separation process. From the results of the study, it was obtained that the optimum absorption occurred in several parameters, namely the initial concentration of RhB at 100 mg/mL, with a pH of 6, the dose of Fe3O4/PEG at 0.8 g/L and a contact time of 40 minutes at room temperature. At this optimum condition, the absorption has a color removal of 31.1%.

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“…The fields of application of Fe 3 O 4 @SiO 2 NPs functionalized with different surfactants, and more frequently with amines, are different. A number of authors have demonstrated their effective applications in biology and medicine [ 1 , 2 ], in catalysis [ 3 , 4 ], and, especially, as effective adsorbents for the removal of pollutants from wastewaters [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. In ref.…”

Section: Introductionmentioning

confidence: 99%

“…In ref. [ 12 ], the magnetic core-shell Fe 3 O 4 @SiO 2 NPs synthesized by the modified Stöber method and functionalized with amino and carboxyl groups were used as a nano-adsorbent for scandium ions from aqueous solutions. In Refs.…”

Section: Introductionmentioning

confidence: 99%

Amino-Functionalized Fe3O4@SiO2 Core-Shell Magnetic Nanoparticles for Dye Adsorption

et al. 2021

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Fe3O4@SiO2 core-shell nanoparticles (NPs) were synthesized with the co-precipitation method and functionalized with NH2 amino-groups. The nanoparticles were characterized by X-ray, FT-IR spectroscopy, transmission electron microscopy, selected area electron diffraction, and vibrating sample magnetometry. The magnetic core of all the nanoparticles was shown to be nanocrystalline with the crystal parameters corresponding only to the Fe3O4 phase covered with a homogeneous amorphous silica (SiO2) shell of about 6 nm in thickness. The FT-IR spectra confirmed the appearance of chemical bonds at amino functionalization. The magnetic measurements revealed unusually high saturation magnetization of the initial Fe3O4 nanoparticles, which was presumably associated with the deviations in the Fe ion distribution between the tetrahedral and octahedral positions in the nanocrystals as compared to the bulk stoichiometric magnetite. The fluorescent spectrum of eosin Y-doped NPs dispersed in water solution was obtained and a red shift and line broadening (in comparison with the dye molecules being free in water) were revealed and explained. Most attention was paid to the adsorption properties of the nanoparticles with respect to three dyes: methylene blue, Congo red, and eosin Y. The kinetic data showed that the adsorption processes were associated with the pseudo-second order mechanism for all three dyes. The equilibrium data were more compatible with the Langmuir isotherm and the maximum adsorption capacity was reached for Congo red.

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Synthesis and surface modification of magnetic Fe3O4@SiO2 core-shell nanoparticles and its application in uptake of scandium (III) ions from aqueous media

Cited by 25 publications

References 60 publications

Scandium Recovery Methods from Mining, Metallurgical Extractive Industries, and Industrial Wastes

Scandium Recovery Methods from Mining, Metallurgical Extractive Industries, and Industrial Wastes

Preparation and Application of Magnetite (Fe3O4) Nanoparticles by Co-precipitation Method for Removal Rhodamine B in Wastewater

Amino-Functionalized Fe3O4@SiO2 Core-Shell Magnetic Nanoparticles for Dye Adsorption

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