Microfluidic Ion Separation of Copper via Liquid-Liquid Extraction Process

Document Type : Research Article

Authors

Research Lab for Advanced Separation Processes, Department of Chemical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran

Abstract

The use of copper metal and its alloys is increasing day by day due to the unique properties of this metal in the electronics, steel alloys and other applications. One of these methods is the use of microfluidic systems. The use of microfluidic systems in continuous separation processes has received much attention in the last two decades. In this study, first the microfluidic system made of glass was made by laser cutting method and then the solvent extraction of copper metal ion was performed by using the microfluidic technique and using PHOSPHORIC ACID 2-ETHYLHEXYL ESTER (MDEHPA) cation extractor in the Y-Y microchannel and the parameters that affecting it have also been investigated, the experiment was designed by using the response level method and the effect of single and simultaneous operational parameters including volume concentration of the extractor, pH of the aqueous phase and residence ion extraction was investigated. In this regard, the amount of extractor concentration 11% (vol/vol), pH equal to 5 and residence time equal to 20 seconds were obtained as optimal operating conditions. In optimal operating conditions, the amount of copper extraction from the aqueous phase was 88.45%. Also the ratio of two-phase aqueous and organic discharges was changed, which according to the results obtained in the Qorg⁄Qaq ratio equal to 2⁄1 the copper ion extraction efficiency increased from 88.45% to 90.54%. The total volumetric mass transfer coefficients (KLa) were also calculated under different conditions to evaluate the mass transfer performance in the microfluidic system. The results showed that KLa values decreased nonlinearly with increasing residence time. The highest KLa values were observed between (0.13-0.78 1⁄s) during the residence time equal 20 second, which is much higher than the KLa values in batch extraction, which indicates better mass transfer performance of the microfluidic system.

Keywords

Main Subjects

References

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Nashrieh Shimi va Mohandesi Shimi Iran
Volume 42, Issue 4 - Serial Number 110
December 2023
Pages 191-203

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