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Fouling of Ultrafiltration Membranes due to Adsorption of a fatty acid

Lindau, Jeanette LU (1998) In Department of Chemical Engineering 1
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)
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)
Please use this url to cite or link to this publication:
author
opponent
  • Prof Nyström, Marianne, Lappeenranta University of Technology
organization
publishing date
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
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
2007-08-01 13:19:02
date last changed
2016-09-19 08:44:58
@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},
  keyword      = {Ultrafiltration Fouling Adsorption Characterisation ESCA FTIR SEM-EDX Ellipsometry Cleaning Capillary condensation,Chemical technology and engineering,Kemiteknik och kemisk teknologi},
  language     = {eng},
  pages        = {172},
  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},
}