General Information
    • ISSN: 2010-0264
    • Frequency: Bimonthly (2010-2014); Monthly (Since 2015)
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
    • Executive Editor: Ms. Nancy Y. Liu
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The University of Queensland, Australia
It is my honor to be the editor-in-chief of IJESD. The journal publishes good papers in the field of environmental science and development.
IJESD 2011 Vol.2(5): 389-393 ISSN: 2010-0264
DOI: 10.7763/IJESD.2011.V2.156

Soybean Oil-Based Bulk Liquid Membrane for Simultaneous Extraction and Stripping of Cu (II) from Aqueous Solutions

Siu Hua Chang, Tjoon Tow Teng, and Norli Ismail

Abstract—This work aimed to investigate the simultaneous extraction and stripping of Cu(II) from aqueous solutions through a soybean oil-based bulk liquid membrane (BLM). The membrane phase used was soybean oil (diluent) loaded with di-2-ethylhexylphosphoric acid (carrier) and tributyl phosphate (phase modifier), whereas the stripping phase was sulphuricacid (H2SO4) at various concentrations. Effects of stirring condition, strip to feed interface area (S:F) ratio, H2SO4 concentration and operating time on Cu(II) extraction and stripping through soybean oil-based BLM were investigated. It was found that stirring affected the extraction process significantly but showed relatively smaller effect on the stripping process. The other parameters such as S:F ratio,H2SO4 concentration and operating time, however, were found to control the stripping process more than the extraction process. The highest extraction (98%) and stripping (86%) were achieved by using soybean oil-based BLM with four stirrings for all phases, S:F ratio of 2.5:1 and 3 M H2SO4 as the stripping phase within 24 h of operating time. Application of soybeanoil-based BLM in real industrial wastewater was also investigated.

Index Terms—Bulk liquid membrane, Cu (II), di-2-ethylhexylphosphoric acid, extraction, soybean oil, stripping.

Siu Hua Chang is with the Faculty of Chemical Engineering, Universiti Teknologi MARA (UiTM) Malaysia, Permatang Pauh, Penang, Malaysia (e-mail: siuhua@
Tjoon Tow Teng and Norli Ismail are with the School of Industrial Technology, Universiti Sains Malaysia, 11800 Penang, Malaysia. (e-mail:;


Cite: Siu Hua Chang, Tjoon Tow Teng and Norli Ismail, "Soybean Oil-Based Bulk Liquid Membrane for Simultaneous Extraction and Stripping of Cu (II) from Aqueous Solutions," International Journal of Environmental Science and Development vol. 2, no. 5, pp. 389-393, 2011.

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