Study on separation of Eu(II) from trivalent rare earths via electro-reduction and ion exchange

Ludek Jelinek, Yuezhou Wei, Tsuyoshi Arai, Mikio Kumagai

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Separation of Eu(II) from trivalent rare earths was carried out in 0.01 mol dm-3 hydrochloric acid medium. Eu(III) was selectively reduced to Eu(II) at glassy carbon cathode in flow type electrolyzer. For Eu(II) separation strong acid cation exchanger based on sulfonated polystyrene/DVB copolymer impregnated into porous silica beads was used. Breakthrough and chromatography curves were measured. Eu(II) exhibited lower affinity towards the sorbent than trivalent rare earths and therefore it was the first species to breakthrough the column. Excellent separation from middle rare earths was achieved while the separation from heavy rare earths was difficult. The back-oxidation of Eu(II) was a problem despite all the measures that were taken to prevent oxidation by dissolved oxygen and photo-oxidation.

Original languageEnglish
Pages (from-to)341-343
Number of pages3
JournalJournal of Alloys and Compounds
Volume451
Issue number1-2
DOIs
Publication statusPublished - 2008 Feb 28
Externally publishedYes

Fingerprint

Rare earths
Ion exchange
Oxidation
Photooxidation
Ion exchangers
Hydrochloric Acid
Polystyrenes
Glassy carbon
Hydrochloric acid
Dissolved oxygen
Sorbents
Chromatography
Silicon Dioxide
Cations
Cathodes
Copolymers
Positive ions
Silica
Acids

Keywords

  • Electro-reduction
  • Eu
  • Glassy carbon cathode
  • Separation

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Study on separation of Eu(II) from trivalent rare earths via electro-reduction and ion exchange. / Jelinek, Ludek; Wei, Yuezhou; Arai, Tsuyoshi; Kumagai, Mikio.

In: Journal of Alloys and Compounds, Vol. 451, No. 1-2, 28.02.2008, p. 341-343.

Research output: Contribution to journalArticle

Jelinek, Ludek ; Wei, Yuezhou ; Arai, Tsuyoshi ; Kumagai, Mikio. / Study on separation of Eu(II) from trivalent rare earths via electro-reduction and ion exchange. In: Journal of Alloys and Compounds. 2008 ; Vol. 451, No. 1-2. pp. 341-343.
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