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Title: Europium and samarium separation using ion exchange between molten salts and beta“-alumina

Abstract

Here, a new approach to separating europium and samarium using ion exchange reactions between molten salts and a solid electrolyte, beta"-alumina, has been demonstrated. Separations were achieved by both ion exchange of europium and samarium into and out of beta"-alumina. A small separation factor of 1.07 was achieved from the ion exchange of europium into beta"-alumina. A much larger separation was achieved from ion exchange of europium out of beta"-alumina, with noticeable dependencies on the molten salt and experimental parameters (temperature, atmosphere, etc.) used. The highest separation factor achieved was greater than 30. However, the europium extraction efficiency was low. The highest europium extraction efficiency achieved was 51.8% ± 2.6 with a separation factor of 4.70 ± 0.46. The selective ion exchange of europium out of the beta"-alumina material is achieved based upon the higher conductivity of Eu 2+ compared to Ln 3+ (Ln = Eu, Sm) species also present in the beta"-alumina.

Authors:
ORCiD logo [1];  [2];  [1]
  1. Isotope and Fuel Cycle Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
  2. Global Security and Strategic Partnerships, Y-12 National Security Complex, Oak Ridge, Tennessee, USA
Publication Date:
Research Org.:
Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1464804
Alternate Identifier(s):
OSTI ID: 1507871
Report Number(s):
IROS-5389
Journal ID: ISSN 0149-6395
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Separation Science and Technology
Additional Journal Information:
Journal Name: Separation Science and Technology; Journal ID: ISSN 0149-6395
Publisher:
Taylor & Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; ion exchange; solid electrolyte; molten salt; europium; samarium

Citation Formats

Myhre, Kristian G., Knowles, Justin R., and Du, Miting. Europium and samarium separation using ion exchange between molten salts and beta“-alumina. United States: N. p., 2019. Web. doi:10.1080/01496395.2019.1604754.
Myhre, Kristian G., Knowles, Justin R., & Du, Miting. Europium and samarium separation using ion exchange between molten salts and beta“-alumina. United States. doi:10.1080/01496395.2019.1604754.
Myhre, Kristian G., Knowles, Justin R., and Du, Miting. Mon . "Europium and samarium separation using ion exchange between molten salts and beta“-alumina". United States. doi:10.1080/01496395.2019.1604754.
@article{osti_1464804,
title = {Europium and samarium separation using ion exchange between molten salts and beta“-alumina},
author = {Myhre, Kristian G. and Knowles, Justin R. and Du, Miting},
abstractNote = {Here, a new approach to separating europium and samarium using ion exchange reactions between molten salts and a solid electrolyte, beta"-alumina, has been demonstrated. Separations were achieved by both ion exchange of europium and samarium into and out of beta"-alumina. A small separation factor of 1.07 was achieved from the ion exchange of europium into beta"-alumina. A much larger separation was achieved from ion exchange of europium out of beta"-alumina, with noticeable dependencies on the molten salt and experimental parameters (temperature, atmosphere, etc.) used. The highest separation factor achieved was greater than 30. However, the europium extraction efficiency was low. The highest europium extraction efficiency achieved was 51.8% ± 2.6 with a separation factor of 4.70 ± 0.46. The selective ion exchange of europium out of the beta"-alumina material is achieved based upon the higher conductivity of Eu2+ compared to Ln3+ (Ln = Eu, Sm) species also present in the beta"-alumina.},
doi = {10.1080/01496395.2019.1604754},
journal = {Separation Science and Technology},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
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This content will become publicly available on April 15, 2020
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