Advanced Methods for Separation and Extraction of Radionuclides

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Purification Technology".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 3157

Special Issue Editor


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Guest Editor
Egyptian Atomic Energy Authority, Abu Zaabal, Cairo, Egypt
Interests: selective separation and purification radioisotopes; production radioisotopes; nuclear reactions; nuclear and radioactive waste; superheavy elements investigations; nanotechnology and biomedical interest; natural radioactive materials; TENORM; materials and their possible applications

Special Issue Information

Dear Colleagues,

I would like to invite all researchers and professors to submit their recent work to be published in the Special Issue, entitled “Advanced Methods for Separation and Extraction of Radionuclides”. Professor Dr. Mohamed F. Attallah (Egyptian Atomic Energy Authority) will act as a Guest Editor on this Special Issue.

Radionuclides exist in our life either naturally or artificially. Man-made radionuclides can be produced via different nuclear reactions. These can be carried out in various ways using neutron flux, charged particles, or heavy ions, as well as photonuclear reaction in a suitable nuclear facility. Moreover, in most cases, some other radionuclides are presented in the matrix that result from a side nuclear reaction and/or decay process of the parent radionuclides. There is increased demand for some radionuclides in different disciplines, such as nuclear medicine, industry, nuclear energy, research, and so on. The purification and separation of those radionuclides are necessary not only for their quantification, in some cases, but also for their wide potential applications. Thus, efficient radioanalytical separation methods are in high demand to achieve the above-mentioned tasks. The separation of natural and/or man-made radionuclides from their matrix is welcome in this issue.

We seek either a novel and/or development separation method that could enrich and be useful for this topic.

Prof. Dr. Mohamed F. Attallah
Guest Editor

Manuscript Submission Information

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Keywords

  • selective separation
  • radioisotopes purification
  • natural radionuclides
  • extraction and recovery
  • rapid and efficient method
  • green proposed method
  • developed process
  • novel radioanalytical procedure

Published Papers (2 papers)

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Research

18 pages, 3471 KiB  
Article
Effect of Scale-Up on Residence Time and Uranium Extraction on Annular Centrifugal Contactors (ACCs)
by Alastair Baker, Alex Fells, Thomas Shaw, Chris J. Maher and Bruce C. Hanson
Separations 2023, 10(6), 331; https://doi.org/10.3390/separations10060331 - 26 May 2023
Cited by 1 | Viewed by 1465
Abstract
This work reports the effect of scaling up annular centrifugal contactors (ACCs) upon the residence time distribution and the efficiency of extraction of uranium. The experiments were carried out in a multi-scale ACC platform of three ACCs with rotor diameters of 12, 25, [...] Read more.
This work reports the effect of scaling up annular centrifugal contactors (ACCs) upon the residence time distribution and the efficiency of extraction of uranium. The experiments were carried out in a multi-scale ACC platform of three ACCs with rotor diameters of 12, 25, and 40 mm. To enable direct comparison across all three scales of ACC, the residence time distributions were acquired by injecting dye into the solvent phase at a constant relative volume related to the ACC liquid holdup. Across all scales and flowrates, there was little difference in residence time distribution (<6 residence volumes), except for the smallest 12 mm rotor diameter ACC with a high solvent/aqueous feed ratio, which required 12 residence volumes, potentially due to internal circulation in the annulus. At low flowrates, the stage efficiency in all cases was >95%, and it improved further in larger rotor diameter ACCs. Full article
(This article belongs to the Special Issue Advanced Methods for Separation and Extraction of Radionuclides)
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20 pages, 3820 KiB  
Article
Removal of Sr(II) in Aqueous Solutions Using Magnetic Crayfish Shell Biochar
by Wenchao Lu, Jundong Feng, Marta Otero, Tao Liao and Liang Qiu
Separations 2023, 10(5), 310; https://doi.org/10.3390/separations10050310 - 13 May 2023
Cited by 2 | Viewed by 1220
Abstract
The cooling water of nuclear power plants and discarded crayfish shells (CS), both containing Sr(II), are waste resources that cause environmental pollution and endanger human health. In this study, magnetic biochar produced by crayfish shells (mag@CSBC) was used as an adsorbent to remove [...] Read more.
The cooling water of nuclear power plants and discarded crayfish shells (CS), both containing Sr(II), are waste resources that cause environmental pollution and endanger human health. In this study, magnetic biochar produced by crayfish shells (mag@CSBC) was used as an adsorbent to remove radionuclide Sr(II) in an aqueous solution and under irradiation conditions. Scanning electron microscopy, X-ray diffraction analysis, Fourier-transform infrared spectroscopy and vibration sample magnetometer analysis were used to characterize mag@CSBC. In addition, an isothermal adsorption experiment conducted under irradiation conditions determined that the maximum adsorption capacity of mag@CSBC was 21.902 mg/g, which was 1.896 mg/g higher than that from experiments conducted under conditions without irradiation and more suitable for the Freundlich isotherm model. The kinetic experiment proved that irradiation could improve the adsorption cap acity of mag@CSBC and reduce the adsorption equilibrium time. At the same time, the experiment further proved that, under irradiated conditions, the adsorption rate of mag@CSBC can reach more than 90%, and the adsorption capacity is the highest when the pH is 8 and the reaction process is exothermic. Competitive adsorption with Na(I) has a high selectivity and strong recyclability. Finally, the mechanism of Sr(II) adsorption by mag@CSBC under irradiation was studied. In conclusion, mag@CSBC, as a low-cost, easy-to-synthesize, environmentally friendly and easy-to-recycle adsorbent, can be applied in batches for the removal of Sr(II) in aqueous solutions. In particular, the concept of using irradiation technology to optimize adsorption behavior serves as an inspiration for future research. Full article
(This article belongs to the Special Issue Advanced Methods for Separation and Extraction of Radionuclides)
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