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The transport of cadmium ions through a supported liquid membrane containing triethanolamine (TEA) as a mobile carrier has been studied. The effects of Cd(II) concentration, HCl in feed and car rier con cen tra tion in mem brane have been stud ied. Cd(II) con - cen tra tion in crease in feed leads to an increase influx from 2.1´10-7 to 8.4´10-7 mol cm-2 sec-1 within Cd(II) ions concentration range (2.7´10-4 M - 16.3´10-4 M) at 2.0 M HCl in the feed and 3.0 M triethanolamine in the membrane. Increase in H+ ion concentration from 0.5 M to 3.0 M results in an increase in Cd(II) ions flux but a decrease is observed beyond 2.0 M HCl concentration in feed. Increase in carrier concentration in the liquid inside the membrane enhances the flux with its maxima at 3.0 M carrier. Further increase in the concentration of TEA leads to a decrease in transport due to increase in viscosity of membrane liquid. The optimum conditions for Cd(II) ions transport are, 2.0 M HCl in feed, 3.0 M TEA in membrane and 0.1 M NaOH as strip solution. Similar transport characteristics have been observed for Cd-EDTA complexed anions across TEA- cyclo - hexanone based SLM, thus indicating a cadmium anion transport coupled with protons and chloride or EDTA co-ions.
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Tom
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19--30
Opis fizyczny
Bibliogr. 27 poz., rys.
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autor
autor
- Department of Natural Sciences, Prince Mohammad Bin Fahad University, P.O. Box 1664, Al-Khobar 31952, Kingdom of Saudi Arabia, mashraf@pmu.edu.sa
Bibliografia
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- 12. Tripathy S.S., Kadambini S. and Das R.P., Sep. Sci. Technol., 37(12), 2897 (2002).
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- 17. Ashraf W. and Mian A., Environ. Toxicol. Chem., 88(2), 187 (2006).
- 18. Inoue Y., Mechanistic Principles of Liquid Membranes Transport, in: T. Araki, H. Tsuku-be (Eds.), Liquid Membranes: Chemical Applications, CRC Press, Boca Raton, FL, 1990.
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- 21. Danesi P.R., Harwitz E.P., Vandegrift G.F. and Chiarizia R., Sep. Sci. Technol., 16(2), 201 (1981).
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- 23.Dansai P.R., Sep. Sci. Technol., 19, 857 (1984).
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- 26. Wilkinson G. and Cotton F.A., Advanced Inorganic Chemistry, 6th Ed., J. Wiley & Sons, New York, 1999.
- 27. Pecksock R.L., Shields L.D. and Cairns T., Modern Methods of Chemical Analysis, 2nd Ed, J. Wiley & Sons, New York, 1976.
Typ dokumentu
Bibliografia
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bwmeta1.element.baztech-article-BUJ6-0025-0039