Autor según el artículo: Chen Y; Rovira-Bru M; Giralt F; Cohen Y

Departamento: Enginyeria Química

e-ISSN: 2073-4441

Autor/es de la URV: Giralt Prat, Francesc d'Assís

Palabras clave: Ultrafiltration Pvp brush layer Protein fouling Membrane cleaning Lys Irreversible fouling resistance Graft polymerization Ceramic membrane Cake layer resistance Bsa

Resumen: 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 PVPmodified 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.

Áreas temáticas: Water science and technology Water resources Interdisciplinar Geography, planning and development Geografía Geociências Fluid flow and transfer processes Environmental sciences Engenharias iii Engenharias i Ciencias sociales Ciências ambientais Ciências agrárias i Biochemistry Aquatic science

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

Direcció de correo del autor: fgiralt@urv.cat

Fecha de alta del registro: 2023-02-19

Volumen de revista: 13

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://www.mdpi.com/2073-4441/13/7/951

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Water. 13 (7):

Referencia de l'ítem segons les normes APA: Chen Y; Rovira-Bru M; Giralt F; Cohen Y (2021). Hydraulic resistance and protein fouling resistance of a zirconia membrane with a tethered PVP layer. Water, 13(7), -. DOI: 10.3390/w13070951

DOI del artículo: 10.3390/w13070951

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2021

Tipo de publicación: Journal Publications