Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 325, Issue 1, Pages 460-466Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2008.08.009
Keywords
Emulsion liquid membrane; Aliquat 336; Chromium (VI) separation and concentration; Wastewater
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Funding
- BAPK in Sakarya University
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The extraction of chromium (VI) ions from acidic solutions containing various metal ions by emulsion liquid membrane (ELM) was studied. Liquid membrane consists of a diluent, a surfactant, and an extractant. 0.5 M ammonium carbonate solution was used as stripping solution. Effects of acid concentration in feed solution, type and concentration of stripping solution, mixing speed, surfactant concentration, phase ratio and the influence of membrane characteristics were studied and optimum conditions were determined. Under the optimum conditions, extraction of chromium (VI) was tested and it was possible to selectively extract 99% of chromium from the acidic feed solution. This study also examined the effect of extractant concentration and acid type in the feed solution on the extraction of Cr (VI) ions and almost all of Cr (VI) from the acidic feed solution containing 500 mg/L from each of Co (II), Ni (II), Cd (II), Zn (II), and Cu (II) ions, and 100-500 mg/L Cr (VI) was extracted within 5-10 min. (c) 2008 Elsevier B.V. All rights reserved.
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