Inhibition of biofouling by modification of forward osmosis membrane using quaternary ammonium cation

Kang Hee Park, Sang Hyun Yu, Han Shin Kim, Hee-Deung Park

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In the operation of the forward osmosis (FO) process, biofouling of the membrane is a potentially serious problem. Development of an FO membrane with antibacterial properties could contributeto a reduction in biofouling. In this study, quaternary ammonium cation (QAC), a widely used biocidal material, was conjugated with a silane coupling agent (3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride) and used to modify an FO membrane to confer antibacterial properties. Fourier transform infrared spectroscopy (FT-IR) demonstrated that the conjugated QAC was successfully immobilized on the FO membrane via covalent bonding. Bacterial viability on the QAC-modified membrane was confirmed via colony count method and visualized via bacterial viability assay. The QAC membrane decreased the viability of Escherichia coli to 62% and Staphylococcus aureus to 77% versus the control membrane. Inhibition of biofilm formation on the QAC modified membrane was confirmed via anti-biofilm tests using the drip-flow reactor and FO unit, resulting in 64% and 68% inhibition in the QAC-modified membrane against the control membrane, respectively. The results demonstrate the effectiveness of the modified membrane in reducing bacterial viability and inhibiting biofilm formation, indicating the potential of QAC-modified membranes to decrease operation costs incurred by biofouling.

Original languageEnglish
Pages (from-to)738-745
Number of pages8
JournalWater Science and Technology
Volume72
Issue number5
DOIs
Publication statusPublished - 2015

Keywords

  • Antibacterial activity
  • Biofouling
  • Forward osmosis
  • Quaternary ammonium cation

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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