Chemical Engineering Research & Design, Vol.109, 108-115, 2016
Magnetic Ionic Liquid in Magmolecular Process for Uranium Removal
The magmolecular process is a recently proposed environmental friendly technique for treatment of wastewater by utilization of magnetic field. In this work, the application of high magnetic field considered for uranium removal from industrial effluent investigated. Highly magnetic ionic liquid of 1-butyl-3-metylimidazolium tetra chloroferrate was used as the extracting solvent in dispersive liquid-liquid extraction method with regard to the utilization of magnetic field in magmolecular process. For dispersing solvent, acetonitrile was employed. Through experimental design and using the response surface methodology, the effects of specific process variables such as pH, volume of disperser and extracting solvent, concentration and volume of feed on the extraction yield were investigated and the optimal condition of extraction was determined as pH = 1.53, feed concentration equal to 33.88 ppm, volume of extracting and disperser solvent equal to 0.48 and 4.51 mL, respectively, in which the magnetic filtration was applied then. The investigations on the dependency of yield of magnetic filtration step on temperature and magnetic field intensity revealed that an increase in temperature results in reduction in yield, while magnetic field intensity increases yield significantly. (c) 2016 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Keywords:Magnetic ionic liquid;Dispersive liquid-liquid extraction;Separation of uranium;Magmolecular process