Characterization of anion exchange membranes fouled with humate during electrodialysis

Abstract Fouling tendencies during electrodialysis (ED) can be determined by the electrochemical and physical properties of the foulants and ion exchange membranes. In this study, the fouling characteristics of anion exchange membranes were investigated according to their electric resistances, hydrophobicities, exchange capacities and zeta potentials. In order to correlate the fouling potential with the properties of the foulant (humate), the zeta potential, molecular weight distribution and total acidity were measured. The fouling potentials in ED cells were compared based on the performances of ED experiments with 0.1 M NaCl containing 100 mg/l of sodium humate, showing that AMX had the lowest fouling potential while ACM the highest. Investigation of pH effects revealed that the ED performance increased at a pH value below the isoelectric point due to increased insoluble humate.

[1]  Jaeweon Cho,et al.  Characterization of clean and natural organic matter (NOM) fouled NF and UF membranes, and foulants characterization☆ , 1998 .

[2]  Lianfa Song.  Flux decline in crossflow microfiltration and ultrafiltration: mechanisms and modeling of membrane fouling , 1998 .

[3]  B. Anspach.  Membranes in Bioprocessing, Theory and Applications. Von J. A. Howell, V. Sanchez und R. W. Field Chapman & Hall, London 1993. 336 S., mit zahlr. Abb. und Tab., geb., £ 85,00. , 1994 .

[4]  Seung-Hyeon Moon,et al.  Lactic acid recovery using two-stage electrodialysis and its modelling , 1998 .

[5]  M. Nyström,et al.  Characterization of cleaning results using combined flux and streaming potential methods , 1997 .

[6]  Matthias Wessling,et al.  Concentration polarization with monopolar ion exchange membranes: current-voltage curves and water dissociation , 1999 .

[7]  G Amy,et al.  Cleaning strategies for flux recovery of an ultrafiltration membrane fouled by natural organic matter. , 2001, Water research.

[8]  J. Laîné,et al.  Control fouling and cleaning procedures of UF membranes by a streaming potential method , 1998 .

[9]  Menachem Elimelech,et al.  Chemical and physical aspects of natural organic matter (NOM) fouling of nanofiltration membranes , 1997 .

[10]  R. J. Hunter,et al.  Zeta Potential of Highly Charged Thin Double-Layer Systems. , 2001, Journal of colloid and interface science.

[11]  J. Laîné,et al.  The streaming potential method for the characterization of ultrafiltration organic membranes and the control of cleaning treatments , 1997 .

[12]  Menachem Elimelech,et al.  Effect of solution chemistry on the surface charge of polymeric reverse osmosis and nanofiltration membranes , 1996 .

[13]  M. Yoshitake,et al.  Characterization of Flemion® membranes for PEFC , 1998 .

[14]  M. Wahlgren,et al.  Membrane Characterization by the Contact Angle Technique: II. Characterization of UF-Membranes and Comparison between the Captive Bubble and Sessile Drop as Methods to obtain Water Contact Angles , 1989 .

[15]  C. H. Amundson,et al.  Use of Electrodialysis to Improve the Protein Stability of Frozen Skim Milks and Milk Concentrates , 1982 .

[16]  R. Audinos,et al.  Fouling of ion-selective membranes during electrodialysis of grape must☆ , 1989 .

[17]  A. Fane,et al.  Evaluation of electroosmosis and streaming potential for measurement of electric charges of polymeric membranes , 1996 .

[18]  P. Pfromm,et al.  Electrodialysis for chloride removal from the chemical recovery cycle of a Kraft pulp mill , 1998 .

[19]  Douglas B. Burns,et al.  Buffer effects on the zeta potential of ultrafiltration membranes , 2000 .

[20]  E. O’Loughlin,et al.  Molecular weight, polydispersity, and spectroscopic properties of aquatic humic substances. , 1994, Environmental science & technology.

[21]  Göran Sundström,et al.  Fouling of electrodialysis membranes by organic substances , 2000 .

[22]  Peter H. Pfromm,et al.  Capacitance spectroscopy to characterize organic fouling of electrodialysis membranes , 1999 .

[23]  J. Pellegrino,et al.  Variance of streaming potential measurements , 1999 .

[24]  A. Foissy,et al.  Use of electrophoretic mobility and streaming potential measurements to characterize electrokinetic properties of ultrafiltration and microfiltration membranes , 1998 .

[25]  M. Guiver,et al.  Tangential flow streaming potential measurements : Hydrodynamic cell characterization and zeta potentials of carboxylated polysulfone membranes , 1998 .