Mass Transport in Porous Liquid Phase Membranes

D. L. Oatley-Radcliffe, S. Al-Aani, P. M. Williams, N. Hilal

Research output: Chapter in Book/Report/Conference proceedingChapter


The mass transfer processes involved in transporting materials from the bulk feed solution through the membrane to form a permeate stream is discussed. The complex microhydrodynamics and interfacial events occurring at the membrane surface and within the membrane itself are outlined. A description of concentration polarization at the membrane surface is described and the concept of real and observed membrane rejection is introduced. The separation of solutes by a membrane is an equilibrium controlled process and this concept is explained in relation to that of a simple sieve and the controlling factors of steric and electrostatics are described. The effect of chemical potential on the transport of solutes through the membrane pore is explained and a mathematical description of this complex phenomena based on the extended Nernst-Planck equation is provided. Finally, the operating conditions and industrial applications of liquid phase membrane processes are outlined to provide the reader with a working knowledge of these high efficiency separation processes.

Original languageEnglish (US)
Title of host publicationMembrane Characterization
PublisherElsevier Inc.
Number of pages22
ISBN (Electronic)9780444637918
ISBN (Print)9780444637765
StatePublished - Feb 20 2017


  • Concentration polarization
  • Extended Nernst-Planck equation
  • Mass transfer
  • Membrane applications
  • Microfiltration
  • Nanofiltration
  • Ultrafiltration

ASJC Scopus subject areas

  • General Engineering
  • General Chemical Engineering


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