Fouling of Ultrafiltration Membranes due to Adsorption of a fatty acid
(1998) In Department of Chemical Engineering 1- Abstract
- A study of fouling of ultrafiltration membranes due to adsorption of a fatty acid in the membrane matrix has been done. Octanoic acid was used as a model substance.
It has been shown that a low-molecular-weight hydrophobic solute can have detrimental effects on the flux of hydrophobic ultrafiltration membranes even though the size of the solute is much smaller than the cut-off of the membrane and the retention is less than 10%. A theory that the flux reduction is due to capillary condensation and how this might be used for characterisation is developed. The effect of solute concentration, membrane pore-size, membrane material and pH of the solution on the flux has been studied.
Different methods of... (More) - A study of fouling of ultrafiltration membranes due to adsorption of a fatty acid in the membrane matrix has been done. Octanoic acid was used as a model substance.
It has been shown that a low-molecular-weight hydrophobic solute can have detrimental effects on the flux of hydrophobic ultrafiltration membranes even though the size of the solute is much smaller than the cut-off of the membrane and the retention is less than 10%. A theory that the flux reduction is due to capillary condensation and how this might be used for characterisation is developed. The effect of solute concentration, membrane pore-size, membrane material and pH of the solution on the flux has been studied.
Different methods of analysis have been used to identify fouling substances on membranes, to analyse membrane materials and to determine the cleaning efficiency. (Less) - Abstract (Swedish)
- Popular Abstract in Swedish
Genom att använda en fettsyra, oktansyra, som modelsubstans har fouling pga adsorption inne i membranmatrisen studerats. Det har visats att mycket lågmolekylära hydrofoba föreningar kan ha en förödande inverkan på ett membrans flux, även om retentionen för dem är mindre än 10%. En teori om att foulingen beror på kapillärkondensation och hur detta skulle kunna användas för karakterisering av vissa membran, läggs fram.
Effekten av koncentration, membran porstorlek, membran material och pH har undersökts.
Det har även gjort en rengöringsstudie på membran foulade med oljehaltigt vatten.
Olika analysmetoder har använts för att identifiera... (More) - Popular Abstract in Swedish
Genom att använda en fettsyra, oktansyra, som modelsubstans har fouling pga adsorption inne i membranmatrisen studerats. Det har visats att mycket lågmolekylära hydrofoba föreningar kan ha en förödande inverkan på ett membrans flux, även om retentionen för dem är mindre än 10%. En teori om att foulingen beror på kapillärkondensation och hur detta skulle kunna användas för karakterisering av vissa membran, läggs fram.
Effekten av koncentration, membran porstorlek, membran material och pH har undersökts.
Det har även gjort en rengöringsstudie på membran foulade med oljehaltigt vatten.
Olika analysmetoder har använts för att identifiera fouling substanser, för att analysera membranmaterial och för att fasställaeffektiviteten på rengöringen av ett membran. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/39192
- author
- Lindau, Jeanette LU
- supervisor
- opponent
-
- Prof Nyström, Marianne, Lappeenranta University of Technology
- organization
- publishing date
- 1998
- type
- Thesis
- publication status
- published
- subject
- keywords
- Ultrafiltration Fouling Adsorption Characterisation ESCA FTIR SEM-EDX Ellipsometry Cleaning Capillary condensation, Chemical technology and engineering, Kemiteknik och kemisk teknologi
- in
- Department of Chemical Engineering 1
- pages
- 172 pages
- publisher
- Chemical Engineering, Lund University
- defense location
- Kemicentrum, Sölveg. 39, hörsal C
- defense date
- 1998-12-04 10:15:00
- external identifiers
-
- other:LUTKDH/(TKKA-1006)/1-77/(1998)
- ISSN
- 1100-2778
- ISBN
- 91-628-3228-X
- language
- English
- LU publication?
- yes
- id
- 95577d8a-4f5b-402a-91ff-b711d31aba04 (old id 39192)
- date added to LUP
- 2016-04-01 17:00:42
- date last changed
- 2019-05-21 12:54:39
@phdthesis{95577d8a-4f5b-402a-91ff-b711d31aba04,
abstract = {{A study of fouling of ultrafiltration membranes due to adsorption of a fatty acid in the membrane matrix has been done. Octanoic acid was used as a model substance.<br/><br>
<br/><br>
It has been shown that a low-molecular-weight hydrophobic solute can have detrimental effects on the flux of hydrophobic ultrafiltration membranes even though the size of the solute is much smaller than the cut-off of the membrane and the retention is less than 10%. A theory that the flux reduction is due to capillary condensation and how this might be used for characterisation is developed. The effect of solute concentration, membrane pore-size, membrane material and pH of the solution on the flux has been studied.<br/><br>
<br/><br>
Different methods of analysis have been used to identify fouling substances on membranes, to analyse membrane materials and to determine the cleaning efficiency.}},
author = {{Lindau, Jeanette}},
isbn = {{91-628-3228-X}},
issn = {{1100-2778}},
keywords = {{Ultrafiltration Fouling Adsorption Characterisation ESCA FTIR SEM-EDX Ellipsometry Cleaning Capillary condensation; Chemical technology and engineering; Kemiteknik och kemisk teknologi}},
language = {{eng}},
publisher = {{Chemical Engineering, Lund University}},
school = {{Lund University}},
series = {{Department of Chemical Engineering 1}},
title = {{Fouling of Ultrafiltration Membranes due to Adsorption of a fatty acid}},
year = {{1998}},
}