This item still needs to be validated !
Title: Salt retention in nanofiltration with multilayer ceramic TiO2 membranes
Authors: Van Gestel, Tim ×
Vandecasteele, Carlo
Buekenhoudt, A
Dotremont, C
Luyten, J
Leysen, R
Van der Bruggen, Bart
Maes, Guido #
Issue Date: Jan-2002
Publisher: Elsevier science bv
Series Title: Journal of membrane science vol:209 issue:2 pages:379-389
Abstract: This paper reports the characterization of a multilayer TiO2 membrane, consisting of two mesoporous anatase interlayers and a microporous anatase top-layer, prepared by a sol-gel procedure. A molecular weight cut-off (MWCO) in the range 500-600 and a permeability of 201h(-1) m(-2) bar(-1) was demonstrated. In order to provide information about the membrane charge, a detailed study was made of zeta potential and salt retention. Five types of salts were considered: NaCl, KCl, LiCl, Na2SO4, CaCl2. Experiments with mono-monovalent salts revealed the amphoteric character of the membrane material with an IEP around pH 6. The membrane showed a minimal salt retention at pH 6 and a fairly high retention at alkaline pH (R(NaCl) = 85%, R(KCl) = 87%, R(LiCl) = 90%). For salts containing divalent ions, zeta potential measurements showed the effect of selective SO42- or Ca2+ adsorption on the membrane charge. In retention experiments with these salts, the correlation between experimentally determined zeta potential and retention behaviour is demonstrated. Depending on the pH of the salt solution and the acquired membrane charge, high retentions were again achieved (R(Na2SO4) > 95%; R(CaCl2) = 78%). (C) 2002 Elsevier Science B.V. All rights reserved.
ISSN: 0376-7388
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics
Teacher Training, Faculty of Kinesiology and Rehabilitation Sciences
Process Engineering for Sustainable Systems Section
Quantum Chemistry and Physical Chemistry Section
Specific Teacher Training Programme in Health Sciences
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science