Special Issue "Current Status and Prospects of Extraction and Separation Technology of Mixed Rare Earth Elements"

A special issue of Separations (ISSN 2297-8739).

Deadline for manuscript submissions: closed (15 February 2022) | Viewed by 1556

Special Issue Editor

Dr. Artem Gelis
E-Mail Website
Guest Editor
Department of Chemistry and Biochemistry, Radiochemistry Program, University of Nevada, Las Vegas, NV 89101, USA
Interests: nuclear fuel cycle; simplified minor actinide lanthanide separation process; electrochemistry; medical isotopes; radiochemistry, microfluidics

Special Issue Information

Dear Colleagues,

The role of rare earth elements (REE) in modern life and their use in the chemical industry have increased at a strikingly fast pace over the last three decades. Numerous applications, including the fabrication of magnets, superconductors, catalysts, and batteries, has caused a significant spike in the demand for REE. More recently, an increase of the use of radioactive isotopes of REE for medicinal applications as novel cancer treatments and imaging agents, namely 44,47Sc, 90Y, 177Lu, and others, has resulted in a rigorous search for novel and efficient separation technologies. These technologies utilize varying methodologies to achieve separation of individual rare earth elements that are very similar in nature.

This Special Issue will focus on the development and applications of state-of-the-art technologies and methods for separating rare earth elements, including but not limited to solvent extraction, ion exchange, chromatography, and electrochemistry. The kinetics of the mass transfer processes through the interface will be of interest. Precedence will be given to unique and novel approaches as well as the most recent developments in the field.

Dr. Artem Gelis
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Separations is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rare earth elements
  • lanthanide separations
  • liquid–liquid extraction
  • ion exchange
  • chromatography
  • mass-transfer kinetics
  • medical isotopes
  • advanced analytical methods

Published Papers (2 papers)

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Research

Article
Separation of Lanthanide Isotopes from Mixed Fission Product Samples
Separations 2021, 8(7), 104; https://doi.org/10.3390/separations8070104 - 20 Jul 2021
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Abstract
The measurement of radioactive fission products from nuclear events has important implications for nuclear data production, environmental monitoring, and nuclear forensics. In a previous paper, the authors reported the optimization of an intra-group lanthanide separation using LN extraction resin from Eichrom Technologies® [...] Read more.
The measurement of radioactive fission products from nuclear events has important implications for nuclear data production, environmental monitoring, and nuclear forensics. In a previous paper, the authors reported the optimization of an intra-group lanthanide separation using LN extraction resin from Eichrom Technologies®, Inc. and a nitric acid gradient. In this work, the method was demonstrated for the separation and quantification of multiple short-lived fission product lanthanide isotopes from a fission product sample produced from the thermal irradiation of highly enriched uranium. The separations were performed in parallel in quadruplicate with reproducible results and high decontamination factors for 153Sm, 156Eu, and 161Tb. Based on the results obtained here, the fission yields for 144Ce, 153Sm, 156Eu, and 161Tb are consistent with published fission yields. This work demonstrates the effectiveness of the separations for the intended application of short-lived lanthanide fission product analysis requiring high decontamination factors. Full article
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Article
Lanthanum Diffusion in Fluorapatite at 400 °C, 50 MPa and 4–16 wt %
Separations 2021, 8(6), 72; https://doi.org/10.3390/separations8060072 - 21 May 2021
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Abstract
Apatite is an important carrier of rare earth elements (REEs) and phosphorite is a potential REEs resource. However, the influence of hydrothermal fluids on the migration and enrichment of REE in apatite remains controversial. The experimental study of the interaction between REE-bearing fluid [...] Read more.
Apatite is an important carrier of rare earth elements (REEs) and phosphorite is a potential REEs resource. However, the influence of hydrothermal fluids on the migration and enrichment of REE in apatite remains controversial. The experimental study of the interaction between REE-bearing fluid and apatite is one of the essential ways to understand the chemical behavior of rare earth elements in apatite. In this study, we conducted the fluid–mineral reaction experimental study (at 400 °C, 50 MPa and 4–16 wt %) between high lanthanum (La) content hydrothermal solution and low REE content to reveal the influence of different salinities on the diffusion of rare earth elements in fluorapatite. Based on in situ geochemical analyses of experimental products, we show that the diffusion coefficients of La in fluorapatite are between 3.24 × 10−15 and 5.88 × 10−15 m2/s. The salinity of the fluid has a great influence on the diffusion coefficient, with the increase of salinity, the diffusion coefficient increase. Full article
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