TY - JOUR
T1 - Extraction of rare-earth metals by liquid surfactant membranes containing a novel cyclic carrier
AU - Kakoi, Takahiko
AU - Nishiyori, Takayuki
AU - Oshima, Tatsuya
AU - Kubota, Fukiko
AU - Goto, Masahiro
AU - Shinkai, Seiji
AU - Nakashio, Fumiyuki
N1 - Funding Information:
This work was partly supported by the Arai Science and Technology Foundation. The authors are grateful to Mr. Ohto in Saga University for the valuable discussion concerning extraction of metals with calix-arene derivatives.
PY - 1997/12/10
Y1 - 1997/12/10
N2 - 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.
AB - 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.
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U2 - 10.1016/S0376-7388(97)00173-7
DO - 10.1016/S0376-7388(97)00173-7
M3 - Article
AN - SCOPUS:0343580437
VL - 136
SP - 261
EP - 271
JO - Journal of Membrane Science
JF - Journal of Membrane Science
SN - 0376-7388
IS - 1-2
ER -