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Open AccessArticle

Hydraulic Resistance and Protein Fouling Resistance of a Zirconia Membrane with a Tethered PVP Layer

1
Water Technology Research Center, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, CA 90095, USA
2
Department d’ Enginyeria Química, Universitat Rovira i Virgili, 43002 Tarragona, Spain
*
Author to whom correspondence should be addressed.
Academic Editors: José Antonio Mendoza-Roca and Amparo Bes-Piá
Water 2021, 13(7), 951; https://doi.org/10.3390/w13070951
Received: 8 March 2021 / Revised: 22 March 2021 / Accepted: 22 March 2021 / Published: 31 March 2021
(This article belongs to the Special Issue Membrane Filtration for Water Reuse)
The influence of surface modification of zirconia (ZrO2) membrane with tethered poly(vinyl pyrrolidone) (PVP) chains was evaluated with respect to the impact of pH and ionic strength on hydraulic resistance and fouling resistance in the filtration of bovine serum albumin (BSA) and lysozyme (Lys) as model protein foulants. The tethered PVP surface layer led to membrane permeability and fouling propensity that were responsive to both pH and ionic strength. The PVP-modified membrane (PVP-ZrO2) hydraulic resistance increased by up to ~48% over a pH range of 6–11, but with no discernible impact at lower pH. Membrane hydraulic resistance was virtually unaffected by ionic strength over the 0.001–1 M range. However, reversible foulant cake resistance in BSA and Lys solution filtration increased with elevated ionic strength, owing in part to the weakening of protein–protein repulsion. Irreversible BSA and Lys fouling was affected by the operational pH relative to the protein isoelectric point (IEP) and reduced under conditions of chain swelling. Irreversible membrane fouling resistance for both proteins was significantly lower, by ~11–49% and 18–74%, respectively, for the PVP-ZrO2 membrane relative to the unmodified ZrO2 membrane. The present results suggest the merit of further exploration of fouling reduction and improvement of membrane cleaning effectiveness via tuning pH and ionic strength triggered conformational responsiveness of the tethered target polymer layer. View Full-Text
Keywords: ceramic membrane; ultrafiltration; protein fouling; BSA; Lys; cake layer resistance; irreversible fouling resistance; membrane cleaning; graft polymerization; PVP brush layer ceramic membrane; ultrafiltration; protein fouling; BSA; Lys; cake layer resistance; irreversible fouling resistance; membrane cleaning; graft polymerization; PVP brush layer
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MDPI and ACS Style

Chen, Y.; Rovira-Bru, M.; Giralt, F.; Cohen, Y. Hydraulic Resistance and Protein Fouling Resistance of a Zirconia Membrane with a Tethered PVP Layer. Water 2021, 13, 951. https://doi.org/10.3390/w13070951

AMA Style

Chen Y, Rovira-Bru M, Giralt F, Cohen Y. Hydraulic Resistance and Protein Fouling Resistance of a Zirconia Membrane with a Tethered PVP Layer. Water. 2021; 13(7):951. https://doi.org/10.3390/w13070951

Chicago/Turabian Style

Chen, Yian; Rovira-Bru, Montserrat; Giralt, Francesc; Cohen, Yoram. 2021. "Hydraulic Resistance and Protein Fouling Resistance of a Zirconia Membrane with a Tethered PVP Layer" Water 13, no. 7: 951. https://doi.org/10.3390/w13070951

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