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

Myhre, Kristian G.; Knowles, Justin R.; Du, Miting

doi:10.1080/01496395.2019.1604754

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

Journal Article · Mon Apr 15 00:00:00 EDT 2019 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496395.2019.1604754· OSTI ID:1464804

^[1]; Knowles, Justin R. ^[2]; Du, Miting ^[1]

Isotope and Fuel Cycle Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
Global Security and Strategic Partnerships, Y-12 National Security Complex, Oak Ridge, Tennessee, USA

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.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Oak Ridge Y-12 Plant (Y-12), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1464804

Alternate ID(s):: OSTI ID: 1507871

Report Number(s):: IROS--5389

Journal Information:: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 9 Vol. 55; ISSN 0149-6395

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
europium
ion exchange
molten salt
samarium
solid electrolyte

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

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