Abstract
Experimental and analytical studies on extraction of volatile fatty acids (VFAs) from aqueous solution using a supported liquid membrane (SLM) were carried out. Teflon soaked with 20% (w/w) of tri-n- octyl phosphine oxide (TOPO) in kerosene was used as a supporting membrane. The extraction rate of VFAs transferred from acid source across the SLM to the sink was measured. It was observed that only undissociated form of VFAs can penetrate into the SLM and the complex formation between TOPO and VFA (1/1 molar ratio) inside the membrane enhanced a flux of VFA across the membrane. This phenomenon was analyzed by the mathematical models for transfer of permeate across the SLM by carrier-facilitating mechanism. In this extraction system, diffusion of the VFA-TOPO complex inside the membrane was most probably the rate-limiting step for the transfer of VFAs.
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Yano, T., Nuchnoi, P., Nishio, N., Nagai, S. (1989). Extraction of Volatile Fatty Acids from Spent Medium with a Supported Liquid Membrane. In: Fiechter, A., Okada, H., Tanner, R.D. (eds) Bioproducts and Bioprocesses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-74227-9_26
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DOI: https://doi.org/10.1007/978-3-642-74227-9_26
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