Utilization of modified polymeric composite supported crown ether for selective sorption and separation of various beta emitting radionuclides in simulated waste

Hamed, Mahmoud Goneam; El‐Dessouky, S. I.; Borai, Ε. H.

doi:10.1016/j.molliq.2022.118799

Cited by 10 publications

(5 citation statements)

References 36 publications

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“…Therefore, when it is applied as an adsorbent, it can perform through different mechanisms of interaction with metal ions. This is because the adsorption mechanism of the sulfonate group is ion exchange, while that of carboxylic acid and amide functional groups is a chelation mechanism . This would contribute to the efficiency and selectivity of the nanocomposite.…”

Section: Results and Discussionsupporting

confidence: 63%

“…It shows an irregular surface morphology full of porous material of different sizes, which indicates a large specific surface area of the MPNC and makes it very suitable for the adsorption operations. The high porosity structure in the nanocomposite would assist in high adsorption and recovery of metal ions . This is because the pores are considered active adsorption sites.…”

Section: Results and Discussionmentioning

confidence: 69%

“…The phenomena whereupon the effluent levels equal roughly 3–5 and 95 percent of the influent concentration were termed as the breakthrough point and exhaustion limit, respectively …”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Novel Magnetite-Polymer Nanocomposite for the Removal of Some Radionuclides: Modeling and Performance Evaluation of Fixed-Bed Column Adsorption

Hamed

Hassan

Ghazy

et al. 2022

Ind. Eng. Chem. Res.

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In this work, a nanocomposite based on magnetite and poly (2-acrylamido-2methyl propane sulfonic acid sodium salt-co-maleic acid-co-styrene) was prepared by gammainduced polymerization at 20 kGy. The average particle size of magnetic nanoparticles was 30 nm, as revealed by transmission electron microscopy, and their saturation magnetization was 79.6 emu g −1 as measured by VSM. FTIR results proved the formation of the magnetite polymer nanocomposite (MPNC), and SEM investigation showed its porous morphology. The nanocomposite was used to remove 137 Cs, (152+154) Eu, and 99 Mo radionuclides from water. The batch adsorption experiment showed that the optimum conditions for adsorption are 60 min of contact time at pH 5. For the three investigated ions, the breakthrough curves produced from the fixed-bed column adsorption experiment show that the exhaustion time (t e ) decreases as the feed flow rate increases and increases as the height of the fixed-bed column increases. The breakthrough curves were modeled using the Thomas and Yoon-Nelson models. The Thomas model provided the greatest fit. The calculated value of Thomas adsorption capacity q Th is close to the experimental value, which could be useful in anticipating scaling-up. The results further demonstrate that the prepared polymer magnetic nanocomposite is extremely selective for (152+154) Eu with a high separation factor.

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Section: Results and Discussionsupporting

confidence: 63%

Section: Results and Discussionmentioning

confidence: 69%

See 1 more Smart Citation

Novel Magnetite-Polymer Nanocomposite for the Removal of Some Radionuclides: Modeling and Performance Evaluation of Fixed-Bed Column Adsorption

Hamed

Hassan

Ghazy

et al. 2022

Ind. Eng. Chem. Res.

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“…This indicates the fit of this model to the experimental data. The Elovich equation is satisfied in chemical adsorption processes and is suitable for systems with heterogeneous adsorbing surfaces …”

Section: Results and Discussionmentioning

confidence: 99%

“…Previous investigation has employed a variety of techniques, including leaching, solvent extraction, and combination approaches scaled up to industrial size, for selectively recovering Eu. However, many of these approaches result in chemical contamination and significant energy usage, harming the natural environment and raising operating expenses. , It is therefore desirable to create appropriate materials that may interact with trivalent rare earth metals (especially Eu) selectively and can be manufactured using scalable techniques. For a sustained supply, it is essential to create options for recovering REEs that are both affordable and environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

Selective Separation of Europium from Lanthanum, Cerium, and Iron Using Porous and Functionalized Polymer

Youssef,

Borai,

El-khalafawy

et al. 2024

Ind. Eng. Chem. Res.

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Europium (Eu) ion is one of the most important and valuable lanthanide elements for nuclear and industrial applications. In this respect, the present study was oriented to prepare a new selective porous polymer using an efficient method for controlled synthesis of block copolymers and polymeric porous particles. Reversible-addition−fragmentation chain transfer (RAFT) emulsion polymerization was performed using poly(styrene-crotonic acid-methacrylic acid) PS(CA-MAA) and trithiocarbonate as a surfactant. The new polymer PS(CA-MAA) was prepared by grafting the polymerization of polystyrene with reactive monomers using γ-rays. The new polymer was investigated for the separation of Eu(III) from light REEs (LREEs) such as La(III), Ce(III), and some impurities such as Fe(III). Different characterizations of the prepared polymer were carried out. Batch experiments were conducted to determine the effects of pH, contact time, and concentration on the sorption and separation of Eu(III) from other light lanthanides and Fe(III). The obtained results revealed that the prepared polymer is more highly selective for Eu(III) than the other LREEs. Lanthanide sorption processes were well fitted to the monolayer sorption isotherm model, with the maximum sorption capacities of 2.51, 7.75, and 45.45 mg g −1 for La(III), Ce(III), and Eu(III), respectively. Pseudo-second-order kinetic models obey the experimental data, suggesting a chemical sorption reaction via a strong complex formation on the surface of PS(CA-MAA). According to the separation factor, separation of Eu from other investigated lanthanides was successively performed and took the order SF(Eu/La)> SF(Eu/Ce), which encouraged further utilization of the prepared polymer for the column chromatographic separation process.

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Synthesis of N-isopropyl acrylamide copolymerized acrylic acid caped with Dibenzo-18-crown-6 composite for selective separation of Co-60 radioisotope from radioactive liquid waste containing Cs-137

2022

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A new selective polymeric composite capped with crown ether was successfully synthesized using N-isopropyl acrylamide copolymerized acrylic acid paired with Dibenzo-18-crown-6, P(NIPAm-Co-AA-DB 18C-6), by Gamma irradiation and ultrasonic homogenizer polymerization. Scanner electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and dynamic light scattering were used to characterize the selected polymeric composite's chemical and physical constitution. SEM shows a rough irregular surface, and FTIR spectra confirmed the function groups of P(NIPAm-Co-AA-DB 18C-6). Moreover, a systematic study of monomer and crown ether concentration was investigated to enhance the composite's performance. The behavior of the synthetic composite toward the selective separation of Co-60 from Cs-137 in a binary system was evaluated. Effects of pH, contact time, and initial ion concentration were investigated in a batch mode and the maximum capacity reached 108.0 mg/g for Co-60 and 82.0 mg/g for Cs-137. Four Kinetic models were investigated (pseudo-first-order, pseudo-second-order, Elovich, and Intra-particle diffusion). Regarding the calculated parameters, pseudo-second-order and Elovich models are the most describing the sorption process, indicating the chemisorptions process. Six adsorption isotherms were examined, two-parameter models (Langmuir, and Freundlich) and three-parameter models (Redlich-Peterson, Khan, Sips, and Hills). The best-fitted isotherm was identified using three error methodological approaches: the correlation coefficient (R2), the chi-square test (χ2), and the root-mean-square error. Isotherm models fit the experimental values in the following sequence: Khan > Rdlish-Peterson > Hills > Sips. Finally, an application for column separation was conducted, and Co-60 was completely separated from Cs-137 by 0.1 M HNO3. These findings indicate promising applications in the successive separation of Co-60 from radioactive liquid waste containing Cs-137 from Egyptian reactors. Graphical abstract

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Utilization of modified polymeric composite supported crown ether for selective sorption and separation of various beta emitting radionuclides in simulated waste

Cited by 10 publications

References 36 publications

Novel Magnetite-Polymer Nanocomposite for the Removal of Some Radionuclides: Modeling and Performance Evaluation of Fixed-Bed Column Adsorption

Novel Magnetite-Polymer Nanocomposite for the Removal of Some Radionuclides: Modeling and Performance Evaluation of Fixed-Bed Column Adsorption

Selective Separation of Europium from Lanthanum, Cerium, and Iron Using Porous and Functionalized Polymer

Synthesis of N-isopropyl acrylamide copolymerized acrylic acid caped with Dibenzo-18-crown-6 composite for selective separation of Co-60 radioisotope from radioactive liquid waste containing Cs-137

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