Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9685028 | Journal of Membrane Science | 2005 | 10 Pages |
Abstract
To explore electrodialysis for purification of negatively charged large organic molecules (e.g., amino acids and medicine), water-swollen formyl methyl pyridinium-immobilized polyvinyl alcohol (PVA-FP) anion-exchange membranes were prepared and characterized in terms of their electrochemical properties. The PVA-FP membranes exhibited low electrical resistance (1.0-3.0 Ω cm2), high swelling properties (water content ratio, 0.62-0.73), and reasonable transport number (t¯â>0.96 for Clâ). For glutamic acid solutions, the electrical resistance of the PVA-FP membrane was low (1.0-3.0 Ω cm2) in a wide pH range, with no membrane fouling. Since the resonance effect of quaternary aromatic ammonium contributed to the structural stability of the PVA-FP membrane, the water-splitting with the PVA-FP membrane was approximately one order of magnitude lower than that with a commercial ion-exchange membrane at a same current density.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Yong-Jin Choi, Ji-Min Park, Kyeong-Ho Yeon, Seung-Hyeon Moon,