Evaluation of structural and charge properties of polyamide nanofiltration membrane
ČlánekOtevřený přístuppeer-reviewedpublishedDatum publikování
2014
Vedoucí práce
Oponent
Název časopisu
Název svazku
Vydavatel
University of Pardubice
Abstrakt
Nanofiltration (NF) is a highly efficient membrane separation process which has
various environmental and industrial applications. Nanofiltration membranes are
finely porous membranes with specific interesting features, their characterization
being important for understanding of the NF processes and for their prediction
for practical use. A polyamide thin-film composite NF membrane (AFC 80) was
characterized in the present work by two different techniques: modelling of the
rejection of uncharged solutes and modelling of the salt rejection. The
interpretation of the data from uncharged solutes rejection experiments by using
Donnan steric partitioning pore model (DSPM) allows to determine the structural
characteristics of the AFC 80 membrane, i.e., effective pore radius (rp), and
thickness to porosity ratio ()x/Ak). The experimental data for sodium chloride
rejection were used to calculate the effective fixed charge density (MX) by means of an irreversible thermodynamics model (Spiegler–Kedem model) and of a
charge model, namely Teorell–Meyer–Sievers (TMS) model. It was found that the
membrane charge depends on the salt concentration in solution, this behaviour
being attributed to ion adsorption on the membrane. The dependence of the
charge density on NaCl concentration obeys a Freundlich isotherm equation.
Rozsah stran
p. 343–359
ISSN
1211-5541
Trvalý odkaz na tento záznam
Projekt
Zdrojový dokument
Scientific papers of the University of Pardubice. Series A, Faculty of Chemical Technology. 20/2014
Vydavatelská verze
Přístup k e-verzi
open access
Název akce
ISBN
978-80-7395-814-5