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Characterization of nanofiltration membranes by the solute transport method: Some practical aspects in determining of mean pore size and pore size distributions

Ismail, A. F. and Hassan, A. R (2004) Characterization of nanofiltration membranes by the solute transport method: Some practical aspects in determining of mean pore size and pore size distributions. In: Regional Symposium on Membrane Science and Technology 2004, 21-25 April 2004, Puteri Pan Pacific Hotel, Johor Bahru, Johor, Malaysia.

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Abstract

Mean pore size and pore size distributions of asymmetric nanofiltration membranes were characterized by using the solute transport methods. The nanofiltration experiment was conducted using the polyethylene glycol feed solutions at the various molecular weight. Based on the solute rejection data, the membrane properties in terms of molecular weight cut-off (MWCO), intrinsic viscosity and solute diameter were calculated using the Stokes-Einstein equation. The linear correlation between solute diameter and solute rejection allowed the estimation of the mean pore size,pµand geometric standard deviation,ps which were in the ranged from about 1.31 to 2.01 nm and about 0.08 to 1.02, respectively. The membrane pore size distribution had been evaluated using the log-normal probability density function at different shear rates. The Hagen-Poiseulle equation was employed to calculate the surface porosity, Sp and pore density, N and in order to study the influences of preparation condition that is shear rate to the membrane structural properties. In general, the results obtained indicated that the asymmetric nanofiltration membrane prepared posses an acceptable separation performance.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Mean pore size; pore size distributions; intrinsic viscosity; surface porosity; pore density.
Subjects:T Technology > TP Chemical technology
ID Code:1038
Deposited By: Pn Norazana Ibrahim
Deposited On:23 Feb 2007 08:45
Last Modified:01 Jun 2010 02:50

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