Mass Transfer Mechanism and Mathematical Model for Extraction Process of L-Theanine across Bulk Liquid Membrane

This paper deals with the extraction of L-Theanine containing Aliquat ۳۳۶ as a carrier and cyclohexane as solvent across bulk liquid membrane. The optimum operation condition are as follows: extraction time of ۱۵۰ min, initial concentration of theanine in the feed phase is ۱.۸ g/L, the carrier concentration is ۰.۵ M, the ion of the receiving phase is ۰.۲ M NaCl of Na۲HPO۴-NaH۲PO۴ buffer solution. A mathematical model of transport process was deduced, the forward interfacial reaction rate constants and the backward interfacial reaction rate constants between the feed phase and the membrane phase, the receiving phase and the membrane phase were taken into account in the model equations. Using the experimental results, several parameters of the proposed model have been achieved by a nonlinear fitting method.

کلیدواژه ها:

Extraction ، Bulk liquid membrane ، L-theanine ، model