Membrane and Water Treatment

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Permeability of pH-sensitive membranes grafted by Fenton-type reaction: An experimental and modeling study

  • Gac, Jakub M. (Faculty of Chemical and Process Engineering, Warsaw University of Technology) ;
  • Bojarska, Marta (Faculty of Chemical and Process Engineering, Warsaw University of Technology) ;
  • Stepniewska, Izabela (Faculty of Chemical and Process Engineering, Warsaw University of Technology) ;
  • Piatkiewicz, Wojciech (Faculty of Chemical and Process Engineering, Warsaw University of Technology) ;
  • Gradon, Leon (Faculty of Chemical and Process Engineering, Warsaw University of Technology)
  • Received : 2014.10.29
  • Accepted : 2015.07.15
  • Published : 2015.09.25
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Abstract

Membrane modification by different concentrations of acrylic acid has been described. Grafting of acrylic acid to the surface of a polypropylene membrane was obtained by a Fenton-type reaction. Membrane permeability seemed to have been dependent on the value of pH in the solution. To explain tendency, a simple theoretical model was developed. The model incorporates explicitly statistical conformations of a polyacid chain grafted onto the pore surface. The charged capillary model with a varying diameter for porous membranes was then used to evaluate the permeability of the membrane. It has been shown both theoretically and experimentally that the permeability of a grafted membrane depends on the pH of the solution.

Keywords

References

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