Selective Eu(III) electro-reduction and subsequent separation of Eu(II) from rare earths(III) via HDEHP impregnated resin

Ludek Jelinek, Yuezhou Wei, Tsuyoshi Arai, Mikio Kumagai

研究成果: Article査読

23 被引用数 (Scopus)

抄録

Eu(III) was selectively reduced to Eu(II) at three-dimensional glassy carbon cathode in 0.01 mol·dm-3 hydrochloric acid medium. Eu(III) reduction took place after all the dissolved oxygen was reduced and then proceeded steadily. Separation of Eu(II) from trivalent rare earths (La, Ce, Sm, Gd, Er, Yb) was carried out using a novel impregnated resin based on bis(2-ethylhexy1)phosphoric acid. Eu(II) showed much lower affinity towards the resin than the trivalent rare earths and broke through the column readily. Eu of purity higher than 99.8% was yielded. The back-oxidation of Eu(II) was observed during the sorption and Eu(III) was absorbed onto the resin. Adsorbed light and middle rare earths could be stripped from the loaded resin by 3M hydrochloric acid. Stripping of heavy rare earths (Er, Yb) was problematic.

本文言語English
ページ(範囲)503-513
ページ数11
ジャーナルSolvent Extraction and Ion Exchange
25
4
DOI
出版ステータスPublished - 2007 7月
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)

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