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Membrane Water Treatment Volume 6, Number 5, September 2015 , pages 411-422 DOI: https://doi.org/10.12989/mwt.2015.6.5.411 |
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Permeability of pH-sensitive membranes grafted by Fenton-type reaction: An experimental and modeling study |
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Jakub M. Gac, Marta Bojarska, Izabela Stępniewska, Wojciech Piątkiewicz and Leon Gradoń
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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. | ||
| Key Words | ||
| ultrafiltration; acrylic acid; membrane grafting; membrane permeability; numerical modeling; pH-sensitive membranes | ||
| Address | ||
| (1) Jakub M. Gac, Marta Bojarska, Izabela Stępniewska, Wojciech Piątkiewicz, Leon Gradoń: Faculty of Chemical and Process Engineering, Warsaw University of Technology, ul. Waryńskiego 1, 00-645 Warszawa, Poland; (2) Marta Bojarska, Wojciech Piątkiewicz: PolymemTech Sp. z o.o., al. NiepodlegŁości 118/90, 02-570 Warszawa, Poland. | ||
