Abstract
The competitive extraction of copper and nickel with kerosene solutions of HDEHP [di-(2-ethylhexyl) phosphoric acid] has been studied in a hollow fiber membrane module. The data showed that the reaction changes from first order to second order as the extraction proceeds. The first-order behavior largely results from mass transfer resistances in the membrane and in the aqueous boundary layer. The second-order reaction, occurring in dilute solution, is a consequence of an interfacial reaction. The results have implications for other metals. Copyright (C) 2000 Elsevier Science B.V.
Original language | English (US) |
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Pages (from-to) | 229-238 |
Number of pages | 10 |
Journal | Journal of Membrane Science |
Volume | 166 |
Issue number | 2 |
DOIs | |
State | Published - Mar 1 2000 |
Bibliographical note
Funding Information:This work was partially supported by the Department of Defense (grant DAA H04-95-1-0094) and by the National Science Foundation (grants CTS 96-27361 and CTS 94-8755). C.F. Yang expresses his special thanks to the Li Foundation for support.
Keywords
- Facilitated transport
- Hollow fibers
- Microporous membranes
- Solvent extraction