Virus reduction through microfiltration membranes modified with a cationic polymer for drinking water applications

T.R. Sinclair, D. Robles, B. Raza, S. van den Hengel, S.A. Rutjes, A.M. de Roda Husman, J. de Grooth, W.M. de Vos* (Corresponding Author), H.D.W. Roesink

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

23 Citations (Scopus)
230 Downloads (Pure)

Abstract

Virus penetration is a significant problem in water treatment membrane filtration. To effectively remove waterborne viruses nano-filtration, reverse osmosis or ultrafiltration must be used, all of which are high energy filtration schemes. Novel approaches and technologies for the production of virus-free drinking water are therefore warranted. In this study, we modified model surfaces and commercial polyether sulfone, (PES) microfiltration (MF) membranes to achieve a substantial virus reduction under gravity based filtration membranes. The successful modification using the cationic polymer polyethyleneimine (PEI) was confirmed by Fourier transform infrared spectroscopy (FTIR) and zeta potential measurements. MS2 bacteriophages, a surrogate for human pathogenic waterborne viruses like norovirus were used to challenge the modified surfaces. The membrane modification resulted in ∼22% loss of the membrane permeability while an increase of ≥3 log10-units (≥99.9%) in MS2 reduction was observed. These reductions were comparable to the reduction of PEI-coated model surfaces tested for contact reduction. This simple modification of a commercially available MF membrane led to substantial viral reductions with a significant flux of 5000 L/m2 in approximately 2.5 h. This work therefore, highlights the potential modified MF membranes for gravity-based filtrations to produce safe drinking water. Further studies should be done to show similarly enhanced reductions of human pathogenic viruses.

Original languageEnglish
Pages (from-to)33-41
Number of pages9
JournalColloids and surfaces A: Physicochemical and engineering aspects
Volume551
DOIs
Publication statusPublished - 20 Aug 2018

Keywords

  • UT-Hybrid-D
  • MS2 bacteriophage
  • Poly-cation polyethyleneimine
  • Virus removal
  • Water purification
  • Microfiltration membranes

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