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Title: Flux decline in nanofiltration due to adsorption of dissolved organic compounds: Model prediction of time dependency
Authors: Braeken, L ×
Van der Bruggen, Bart
Vandecasteele, Carlo #
Issue Date: Feb-2006
Publisher: Amer chemical soc
Series Title: Journal of physical chemistry b vol:110 issue:6 pages:2957-2962
Abstract: Flux decline during nanofiltration of aqueous solutions containing dissolved organic compounds is mainly caused by adsorption of these compounds in the membrane pores and on the membrane Surface. In this paper, flux decline is modeled by incorporating the loss of permeability due to adsorption in the Spiegler-Kedem equation. This results in a logarithmic relation between normalized flux decline and time until the adsorption equilibrium is reached and the flux reaches a constant value. In this way, the expected flux decline due to adsorption of organic compounds call be estimated. Two different parameters were used in the model: the time delay to, which corresponds to the time at which the adsorption process in the membrane pores and on the membrane surface sets in, and the corresponding reduction of free (pore) volume (b). Both parameters depend oil the hydrophobicity of the compounds and oil the feed concentration.
URI: 
ISSN: 1520-6106
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Process Engineering for Sustainable Systems Section
× corresponding author
# (joint) last author

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