No Cover Image

Journal article 1314 views 352 downloads

Laser Doppler Electrophoresis and electro-osmotic flow mapping: A novel methodology for the determination of membrane surface zeta potential

Tony E. Thomas, SAIF AL AANI, Darren Oatley-Radcliffe Orcid Logo, Paul Williams Orcid Logo, Nidal Hilal

Journal of Membrane Science, Volume: 523, Pages: 524 - 532

Swansea University Authors: SAIF AL AANI, Darren Oatley-Radcliffe Orcid Logo, Paul Williams Orcid Logo, Nidal Hilal

  • thomas2016(2)v3.pdf

    PDF | Accepted Manuscript

    Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND).

    Download (2.11MB)

Abstract

A novel technique employing an Uzigirs dip cell arrangement is used in conjunction with Laser Doppler Electrophoresis for the determination of the surface zeta potential for a UF, NF, and RO membrane. To the authors best knowledge this is the first study employing Laser Doppler Electrophoresis and E...

Full description

Published in: Journal of Membrane Science
ISSN: 0376-7388
Published: 2017
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa30749
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: A novel technique employing an Uzigirs dip cell arrangement is used in conjunction with Laser Doppler Electrophoresis for the determination of the surface zeta potential for a UF, NF, and RO membrane. To the authors best knowledge this is the first study employing Laser Doppler Electrophoresis and Electro-osmotic Flow Mapping for membrane surface charge determination. High correlation of the regression fit (R2>0.95) for a carboxylated polystyrene latex particle electrophoretic mobility was achieved at low electrolyte concentrations (1mM and 10mM NaCl), but the reliability and accuracy of the extrapolated zeta potential values were problematic at higher concentration due to high measurement uncertainty (>10% in some cases). Changes in the applied electric field increased the phase resolution of 50mM NaCl electrolyte solutions between 0.5-2.0V. However, the effects of Joule heating at higher voltages compromised 50mM NaCl sample integrity. When compared with the established Tangential Streaming Potential method, Laser Doppler Electrophoresis measurements provided similar zeta potential values and trends indicating that this new methodology can indeed be employed for membrane characterization purposes; however, further research needs to be conducted in order to optimize this new technique and set appropriate operating limits.
Keywords: Membrane characterization; Electrokinetic charge; Laser Doppler Electrophoresis; Streaming potential; Zeta potential
College: Faculty of Science and Engineering
Start Page: 524
End Page: 532