Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Effect of Operating Conditions on the Efficiency of Liquid-Liquid Extraction of Lead in Microchannel

Document Type : Research Article

Author
Mahnaz Yasemi
Department of Chemical Engineering, Eyvan-e-Gharb Branch, Islamic Azad University, Eyvan-e-Gharb, I.R. IRAN
Abstract
Owing to its unique properties, lead as a heavy metal, is widely utilized in various industries. Nevertheless, lead is known as one of the most toxic elements for human beings. Microchannel provides a novel approach to liquid-liquid extraction, which enables us to have a very fast mass transfer process, high throughput, and better control of the flow pattern. Due to increased surface area to volume, reduced extraction time, reduced solvent consumption and improved extraction efficiency, separation processes in microchannels have attracted attention of researchers over the past two decades. In the present study, lead (II) was removed from aqueous solution in a micro-mixer using D2EHPA solvent. The effect of microchannel angle of incidence (45°, 90°, 135°, 180°), two-phase flow rate ratio (0.5, 1, and 2), nanoparticle concentration (0.01, 0.02, 0.03, and 0.04 w/v), inert gas flow rate (2, 4, and 6 mL/min), and ultrasound irradiation and their combination were investigated to improve lead removal and increase mass transfer. The results demonstrated that the use of inert gas, nanoparticles under magnetic and ultrasonic fields increases the mixing and mass transfer rate. Accordingly, the removal efficiency of lead (II) rises to 96.88%.
Keywords
Microchannel
Nanoparticles
Liquid-Liquid extraction
Inert gas
Ultrasonic
Lead removal

Subjects

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