پريسا طغياني

Liquid-liquid extraction (LLE) is recognized as an efficient and versatile separation technique in various industries. Combining LLE with microfluidics technology offers numerous advantages, including reduced sample and chemical volumes, enhanced accuracy and faster data measurement, decreased experimental time and cost, and miniaturization of analytical devices. Computational simulations, as a powerful tool for the analysis and optimization of LLE processes, enable rapid and accurate eva‎luation of the physical and chemical behavior of these processes.This can significantly reduce the need for expensive and time-consuming experimental studies.In this study, the computational fluid dynamics (CFD) simulation of the solvent extraction of cobalt(II) ion was performed using di-2-ethylhexyl phosphoric acid (D2EHPA) as the extractant and decane as the organic solvent in a Y-Y microchannel. The effects of geometrical parameters, including the inlet angle (30-180°) and the outlet angle (30-90°), were initially investigated. Subsequently, the effects of operational parameters such as the aqueous phase pH (4.4-8), the organic-to-aqueous phase flow rate ratio (0.5-3), the initial cobalt concentration in the aqueous phase (5-25 mM), and the extractant concentration (10-30 mM) were examined. The results demonstrated that increasing the microchannel inlet angle from 30° to 120° improves the extraction efficiency due to enhanced mixing between the two phases. It was also observed that under identical conditions, the extraction efficiency is better for a Y-shaped inlet compared to a T-shaped inlet. The optimum conditions for extraction were determined as the inlet angle of 132°, the outlet angle of 77°, pH = 7.13, the initial cobalt concentration of 21.6 mM, the extractant concentration of 27.2 mM, and the organic-to-aqueous phase flow rate ratio of 2.53. The extraction efficiency under these conditions was 84.46%. Keywords: Liquid-liquid solvent extraction, Microfluidics, CFD simulation, Microchannel inlet geometry, Cobalt

استخراج مايع- مايع , ريزسيالش , ديناميك سيالات محاسباتي , هندسه ورودي ميكروكانال , كبالت

Liquid-liquid solvent extraction , Microfluidics , CFD Simulation , Microchannel inlet geometry , cobalt

Parisa Toghyani

Ahmad Rahbar