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Extraction of molybdenum by a supported liquid membrane method
Carlos Basualto1, José Marchese, Fernando Valenzuela
1Lab. Operaciones Unitarias, Fac. Ciencias Quimicas y Farmacéuticas, Universidad de Chile, CC 233, Santiago, Chile. cbasualt@uchile.cl
Talanta
|October 31, 2008
Summary
This study details molybdenum(VI) ion extraction using a supported liquid membrane with Alamine 336. Optimal conditions were found for efficient metal recovery via this membrane technology.
Area of Science:
- Chemical Engineering
- Materials Science
- Environmental Chemistry
Background:
- Supported liquid membranes (SLMs) offer efficient separation technologies.
- Alamine 336 is a tertiary amine extractant suitable for metal ion complexation.
- Molybdenum(VI) recovery is crucial for various industrial and environmental applications.
Purpose of the Study:
- To investigate the extraction and permeation of molybdenum(VI) ions using a supported liquid membrane.
- To determine optimal conditions for molybdenum(VI) transport through the membrane.
- To explore the extraction mechanism of molybdenum(VI) by Alamine 336.
Main Methods:
- Preparation of a supported liquid membrane using kerosene and Alamine 336 as the mobile carrier.
- Utilizing a flat hydrophobic microporous membrane as the solid support.
- Conducting liquid-liquid extraction and stripping partition experiments to establish optimal conditions.
Main Results:
- Maximal molybdenum(VI) extraction achieved at pH 2.0 with sulfuric acid in the feed solution.
- Optimal stripping conditions identified using Na(2)CO(3) at pH > 11.0.
- Molybdenum extraction significantly enhanced with 0.02 mol/L Alamine 336 concentration in the organic phase.
Conclusions:
- Supported liquid membrane technology with Alamine 336 is effective for molybdenum(VI) ion extraction.
- Optimized pH and carrier concentration are critical for efficient metal flux.
- The study provides insights into the equilibrium and mechanism of molybdenum(VI) transport through SLMs.
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