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

Ludek Jelinek; Yuezhou Wei; Tsuyoshi Arai; Mikio Kumagai

doi:10.1016/j.jallcom.2007.04.139

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 journal › Article › peer-review

16 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 language	English
Pages (from-to)	341-343
Number of pages	3
Journal	Journal of Alloys and Compounds
Volume	451
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2007.04.139
Publication status	Published - 2008 Feb 28
Externally published	Yes

Keywords

Electro-reduction
Eu
Glassy carbon cathode
Separation

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2007.04.139

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

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.",

keywords = "Electro-reduction, Eu, Glassy carbon cathode, Separation",

author = "Ludek Jelinek and Yuezhou Wei and Tsuyoshi Arai and Mikio Kumagai",

note = "Funding Information: This work was financially supported by Japan Society for Promotion of Science (JSPS).",

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doi = "10.1016/j.jallcom.2007.04.139",

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T1 - Study on separation of Eu(II) from trivalent rare earths via electro-reduction and ion exchange

AU - Jelinek, Ludek

AU - Wei, Yuezhou

AU - Arai, Tsuyoshi

AU - Kumagai, Mikio

N1 - Funding Information: This work was financially supported by Japan Society for Promotion of Science (JSPS).

PY - 2008/2/28

Y1 - 2008/2/28

N2 - 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.

AB - 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.

KW - Electro-reduction

KW - Eu

KW - Glassy carbon cathode

KW - Separation

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JF - Journal of Alloys and Compounds

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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