Abstract
This paper reports the sol–gel preparation and subsequent characterization of ceramic multilayer membranes, comprising a mesoporous -Al2O3 or ZrO2 interlayer and a microporous ZrO2 toplayer. The optimized membranes show a molecular weight cut-off (MWCO) of 200–300 in standard nanofiltration tests after firing the ZrO2 toplayer at 400 ◦C. For the all-ZrO2 membrane, a detailed study was made of its corrosion behaviour. PEGretention, MWCO and permeability were studied in dynamic corrosion tests using aqueous solutions both at low and high pH values. Long-term corrosion tests (4 weeks) at successive pH values of 2, 13 and 1 demonstrated no significant loss in performance for the membranes showing a MWCO in the range 200–300.
Original language | English |
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Pages (from-to) | 128-136 |
Number of pages | 9 |
Journal | Journal of membrane science |
Volume | 284 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2006 |
Keywords
- Ceramic membrane
- ZrO2
- Nanofiltration
- PEG-retention
- Corrosion behaviour