TY - JOUR
T1 - Permeation behavior of rare earth metals with a calix[4]arene carboxyl derivative in a hollow-fiber membrane
AU - Kubota, Fukiko
AU - Kakoi, Takahiko
AU - Goto, Masahiro
AU - Furusaki, Shintaro
AU - Nakashio, Fumiyuki
AU - Hano, Tadashi
N1 - Funding Information:
We are grateful to Professor K. Yoshizuka of Saga University for his helpful discussion about numerical analysis, and also thank Mr. Horiuchi of Kyushu University for his technical assistance in construction of the membrane extractor. The authors are grateful to Japan Gore-tex. Inc., for the supply of the hollow-fiber membrane. This work was partly supported by a Grant-in-Aid for Science Research (No. 10141234) from the Ministry of Education, Science and Culture of Japan and by the Arai Science and Technology foundation.
PY - 2000/2/1
Y1 - 2000/2/1
N2 - Extraction of three rare earth metals (Er, Ho and Y) was performed by a microporous hydrophobic hollow-fiber membrane extractor using a novel calix[4]arene carboxyl derivative in toluene. It was found that the permeation rate through the membrane of metal ions with calix[4]arene carboxyl derivative was relatively slow, while the addition of a small amount of sodium ion into the aqueous solution drastically accelerated the permeation rate and also enhanced the selectivity between heavy rare earth metals (Er and Ho) and Y. The experimental results obtained under a variety of conditions were analyzed by a diffusion model which combined with the complexation reaction at the aqueous-organic interface, taking account of the velocity distribution of the aqueous and organic solutions through the inner and outer sides, respectively, of the hollow-fiber membrane extractor. The model well explained the permeation behavior of the rare earth metals through the membrane and the role of sodium ion on the acceleration effect of the permeation rate. Copyright (C) 2000 Elsevier Science B.V.
AB - Extraction of three rare earth metals (Er, Ho and Y) was performed by a microporous hydrophobic hollow-fiber membrane extractor using a novel calix[4]arene carboxyl derivative in toluene. It was found that the permeation rate through the membrane of metal ions with calix[4]arene carboxyl derivative was relatively slow, while the addition of a small amount of sodium ion into the aqueous solution drastically accelerated the permeation rate and also enhanced the selectivity between heavy rare earth metals (Er and Ho) and Y. The experimental results obtained under a variety of conditions were analyzed by a diffusion model which combined with the complexation reaction at the aqueous-organic interface, taking account of the velocity distribution of the aqueous and organic solutions through the inner and outer sides, respectively, of the hollow-fiber membrane extractor. The model well explained the permeation behavior of the rare earth metals through the membrane and the role of sodium ion on the acceleration effect of the permeation rate. Copyright (C) 2000 Elsevier Science B.V.
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U2 - 10.1016/S0376-7388(99)00231-8
DO - 10.1016/S0376-7388(99)00231-8
M3 - Article
AN - SCOPUS:0033970693
VL - 165
SP - 149
EP - 158
JO - Journal of Membrane Science
JF - Journal of Membrane Science
SN - 0376-7388
IS - 2
ER -