International Journal of Membrane Science and Technology  (Volume 2 Issue 2)
 Preparation of Polymer Inclusion Membranes (PIMs) with Ionic Liquid and its application in dye adsorption process supported by statistical analysis International Journal of Membrane Science and Technology
Pages 65-77

D. Shanthana Lakshmi, Sergio Santoro, Elisa Avruscio, Antonio Tagarelli and Alberto Figoli

DOI: http://dx.doi.org/10.15379/2410-1869.2015.02.02.07


Published: 30 November 2015
Abstract
Polymer inclusion membranes (PIMs) were prepared via Non-Solvent Induced Phase Separation (NIPS) using polyethersulfone (PES) loaded with a liquid ionic, 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]). Hydrophilic porous PIMs with a controlled morphology were obtained and tested for the removal of reactive blue 19 (RB19) as a model anionic dye. The dye adsorption efficiency depends on several variables i.e. pH, contact time, initial dye concentration, amount and weight of adsorbent (PIMs). The optimal values of these parameters were calculated by the multivariate approach of “Experimental design” and, in particular, a central composite design (CCD). The optimal conditions obtained from the response surface data are: [BMIM][PF6] concentration 10.7wt%, pH 3.0, RB19 dye concentration 10.0 ppm and PIMs of weight 0.055 mg. The experimental adsorption percentage of RB19value (69.2%) was in agreement to those predicted by the CCD model (71.7%).
Keywords
 Ionic liquid, Polymer inclusion membranes (PIMs), Dye Adsorption, Central Composite Design (CCD).
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