Electrostatic repulsion as a mechanism in fouling of ultrafiltration membranes

Elizabeth Arkhangelsky, Inna Levitsky, Vitaly Gitis

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Studies of electrostatic repulsion in ultrafiltration membranes are limited to applications of different organic compounds carrying a set of unique characteristics, or to changes of general water parameters such as ionic strength and pH. The proposed method of deliberate alteration of surface charge of organic molecule by succinylation or by guanidination provides an opportunity to selectively investigate the electrostatic mechanism without changing size or hydrophobic properties of investigated molecule. The approach was successfully implemented on BSA protein, and new inside into the mechanism of electrostatic mechanism was obtained. The electrostatic repulsion becomes important when zeta potential of the protein exceeded 20 mV, when before the threshold the interactions were mainly governed by size exclusion.

Original languageEnglish
Pages (from-to)1955-1961
Number of pages7
JournalWater Science and Technology
Volume58
Issue number10
DOIs
Publication statusPublished - 2008

Keywords

  • BSA
  • MWCO
  • PES
  • Protein

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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