Emulsion ionic liquid membrane using edible paraffin oil for lead removal from aqueous solutions

Fora variety of reasons, such as high selectivity, easy control, easy reduction, and environmental compatibility, there is the high potential for the use of emulsion ionic liquid membranes (EILM) has been expanded. The edible oils have great potential for using in food industry extraction processes. Edible paraffin used for this purpose is less toxic and more cost-effective than other membranes. The technique of EILM based on edible oils was used as a chemical process for Pb2+ recovery from aqueous solution, using Aliquat 336 as an ionic liquid carrier and the ionic transport agent for Pb2+ ions in the membrane phase. The Tween 80 as a dispersive non-ionic surfactant was used for the emulsion formation. The kinetics and effective parameters on the membrane process performance were investigated. The results showed that factors such as the ratio of the internal phase to the organic phase, the concentration of ion carrier material, the surfactant concentration, and pH increasing had a positive effect on metal separation efficiency. The maximum lead separation was performed for 3 and 10 mu L of Aliquat 336 and Tween 80, respectively, in 20 mL of the organic phase. A removal percentage of 95% was achieved for 5 mg/L of lead in the feed phase. Using edible oil in this study was successfully developed to reduce the need for toxic organic solvents in preparing EILM for heavy metal solution treatment. (C) 2020 Elsevier B.V. All rights reserved.