Extraction of rare-earth metals by liquid surfactant membranes containing a novel cyclic carrier

Takahiko Kakoi, Takayuki Nishiyori, Tatsuya Oshima, Fukiko Kubota, Masahiro Goto, Seiji Shinkai, Fumiyuki Nakashio

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Extraction behavior of three rare-earth metals (Ho, Er and Y), was systematically studied by liquid surfactant membranes (LSMs) containing a novel host compound, a calixarene carboxyl derivative, which is a cyclic compound connected to some phenol rings, as a mobile carrier in a stirred cell. Using the host compound, the extraction equilibrium of the metals in liquid-liquid extraction was also investigated in order to elucidate the complexation mechanism between the metal ions and the cyclic compound. The calixarene carboxyl derivative showed a high extractability for all rare-earth metal ions compared with the analog monomer compound. The extractability for the rare-earth metals was found to increase in the following order: monomer < tetramer < hexamer. However, the extraction rate of the tetramer was higher than that of the hexamer. The carboxyl derivative of calix[4]arene (tetramer) was an excellent carrier for the permeation of rare-earth metals by LSMs. The effects of several operation factors on the extraction of the metals by LSMs were systematically examined with the calix[4]arene. The permeation mechanism of the rare-earth metals by LSMs containing the mobile carrier was explained with an interfacial reaction model.

Original languageEnglish
Pages (from-to)261-271
Number of pages11
JournalJournal of Membrane Science
Volume136
Issue number1-2
DOIs
Publication statusPublished - Dec 10 1997

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Rare Earth Metals
Surface-Active Agents
Rare earths
Surface active agents
rare earth elements
surfactants
membranes
Membranes
Calixarenes
Liquids
liquids
Metals
cyclic compounds
metals
Derivatives
Permeation
Metal ions
Ions
metal ions
monomers

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

Extraction of rare-earth metals by liquid surfactant membranes containing a novel cyclic carrier. / Kakoi, Takahiko; Nishiyori, Takayuki; Oshima, Tatsuya; Kubota, Fukiko; Goto, Masahiro; Shinkai, Seiji; Nakashio, Fumiyuki.

In: Journal of Membrane Science, Vol. 136, No. 1-2, 10.12.1997, p. 261-271.

Research output: Contribution to journalArticle

Kakoi, Takahiko ; Nishiyori, Takayuki ; Oshima, Tatsuya ; Kubota, Fukiko ; Goto, Masahiro ; Shinkai, Seiji ; Nakashio, Fumiyuki. / Extraction of rare-earth metals by liquid surfactant membranes containing a novel cyclic carrier. In: Journal of Membrane Science. 1997 ; Vol. 136, No. 1-2. pp. 261-271.
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