Analysis of the mechanism of rare earth metal permeation through a liquid membrane with a chelating agent in the | Zendy

Kojima Toshinori | Zendy; Nakayama Chikako | Zendy; Uemiya Shigeyuki | Zendy

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Analysis of the mechanism of rare earth metal permeation through a liquid membrane with a chelating agent in the

Author(s) -

Kojima Toshinori,

Nakayama Chikako,

Uemiya Shigeyuki

Publication year - 1994

Publication title -

the canadian journal of chemical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.404

H-Index - 67

eISSN - 1939-019X

pISSN - 0008-4034

DOI - 10.1002/cjce.5450720111

Subject(s) - permeation , chelation , phosphoric acid , chemistry , stripping (fiber) , membrane , metal ions in aqueous solution , selectivity , metal , inorganic chemistry , phase (matter) , rare earth , nuclear chemistry , chromatography , organic chemistry , materials science , mineralogy , biochemistry , composite material , catalysis

The effect of adding a water‐soluble chelating agent, diethylenetriaminepentaacetic acid (DTPA), to the feed phase was studied on the selective permeation of rare earth metal ions (Ln 3+ ) through a supported liquid membrane (SLM) containing 2‐ethylhexyl phosphoric acid mono‐2‐ethylhexyl ester (PC‐88A). High selectivity of Pr to Nd was observed at a pH of 2.0 in the stripping phase, and selective permeation of La was observed at higher pH values. The permeation mechanism of the Ln 3+ was analyzed, and the above results were explained by the change in the concentrations of free Ln 3+ in the feed phase and Ln 3+ /PC‐88A complexes in the SLM with pH.

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