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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received December 11, 2006
Accepted July 23, 2007

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Removal characteristics of metal cations and their mixtures using micellar-enhanced ultrafiltration

Hojeong Kim Kitae Baek¹ Bo-Kyong Kim Hyun-Jae Shin² Ji-Won Yang^†

National Research Laboratory for Environmental Remediation, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea ¹Department of Environmental Engineering, Kumoh National Institute of Technology, 1 Yangho-dong, Gumi, Gyeongbuk 730-701, Korea ²Department of Chemical & Biochemical Engineering, Chosun University, Gwangju 501-759, Korea

Korean Journal of Chemical Engineering, March 2008, 25(2), 253-258(6), 10.1007/s11814-008-0045-y

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Abstract

Divalent ions were removed by ultrafiltration of anionic surfactant solution and the removal characteristics in single and mixed systems were investigated. The removal efficiency was >95% when the ratio of sodium dodecyl sulfate (SDS) to metal ions (S/M ratio) was >10. In single metal systems, the removal efficiency of each metal ion was almost the same. In the mixture, however, there was slight difference (ca. 1-2%) of removal efficiency and the order was Cd2+>Cu2+>Co2+.Zn2+. As S/M ratio increased, the difference in removal efficiency diminished. To explain the difference of removal efficiency in a mixture, complexation of divalent metal ion with counterion was considered. The distribution of complexed form of each metal ion was calculated, but it did not coincide with the experimental results. Further research will be necessary for a clear explanation.

Keywords

Heavy Metal Micelle Sodium Dodecyl Sulfate (SDS) Ultrafiltration

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