Fabrication of novel mixed matrix electrodialysis heterogeneous ion-exchange membranes modified by ilmenite (FeTiO3): electrochemical and ionic transport characteristics
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Novel mixed matrix polyvinylchloride-based electrodialysis heterogeneous cation-exchange membranes were prepared by casting technique. Ilmenite (FeTiO3) was employed as additive in membrane fabrication. The effect of additive concentration on electrochemical properties of membranes was studied. Water content was decreased slightly by increase of FeTiO3 concentration. Ion-exchange capacity was improved initially by increase in additive content to 16 wt.% and then showed decreasing trend by more additive loading. Membrane potential, transport number and selectivity were enhanced initially in NaCl solution by increase of FeTiO3 content up to 16 wt.% and then decreased by more additive loading. Increment of FeTiO3 concentration led to decrease of selectivity and transport number in BaCl2 solution. Permeability and flux were declined slightly by increase in additive content up to 8 wt.% and then began to increase sharply by more additive content from 8 to 16 wt.%. Permeability and flux were decreased again by more additive concentration from 16 to 32 wt.%. Electrodialysis experiment results in laboratory scale showed higher dialytic rate for modified membrane compared to pristine one. Membrane areal electrical resistance was declined by increase of additive concentration. Membranes exhibited higher selectivity and flux for monovalent ions compared to bivalent ones.
KeywordsMixed matrix Ion-exchange membrane Ionic transport property Ilmenite (FeTiO3) Desalination/water treatment
The authors gratefully acknowledge Arak University for the financial support during this research.
- 14.Koter S, Warszawski A (2000) Electro-membrane processes in environment protection. Pol J Environ Stud 9(1):45–56Google Scholar
- 24.Sata T (2004) Ion exchange membranes: preparation, characterization, modification and application. The Royal Society of Chemistry, Cambridge, United KingdomGoogle Scholar
- 26.Hosseini SM, Madaeni SS, Zendehnam A, Moghadassi AR, Khodabakhshi AR, Sanaeepur H (2013) Preparation and characterization of PVC based heterogeneous ion exchange membrane coated with Ag nanoparticles by (thermal-plasma) treatment assisted surface modification. J Ind Eng Chem 19:854–862CrossRefGoogle Scholar
- 30.P. Daraei, S. S. Madaeni, N. Ghaemi, E. Salehi, M. Khadivi, R. Moradian, B. Astinchap, Novel polyethersulfone nanocomposite membrane prepared by PANI/Fe3O4 nanoparticles with enhanced performance for Cu(II) removal from water, Journal of Membrane Science, Article in press, Corrected proof, Available online 18 May 2012Google Scholar
- 36.Wiks ES (2001) Industrial polymers handbook: products, processes, application. WILEY-VCH press, GermanyGoogle Scholar
- 37.James E (1999) MARK, polymer data handbook. Oxford University Press, Inc., New YorkGoogle Scholar
- 38.Harper CA (1975) Handbook of plastic and elastomers. McGraw-Hill, New YorkGoogle Scholar
- 42.Tanaka Y (2007) Ion exchange membranes: fundamentals and applications, membrane science and technology series, 12. Elsevier, NetherlandsGoogle Scholar
- 45.D.R. Lide, CRC Handbook of Chemistry and Physics, CRC press, 87th edition, 2006–2007Google Scholar