Nanofiltration of natural organic matter with H2O2/UV pretreatment: Fouling mitigation and membrane surface characterization

Wonho Song, Varadarajan Ravindran, Bruce E. Koel, Massoud Pirbazari

Research output: Contribution to journalArticle

101 Scopus citations

Abstract

This research investigated the application of H2O2/UV oxidation for source water pretreatment, and membrane cleaning to improve the performance of nanofiltration processes. It further examined the nature and mechanisms of membrane fouling by natural organic matter (NOM), and membrane cleaning using different chemical agents, by employing several surface characterization techniques. These techniques included attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and scanning electron microscopy (SEM). The study revealed that significant improvement could be achieved in the efficiency and economics of nanofiltration for removing NOM and synthetic organic chemicals (SOCs) by employing source water pretreatment and membrane cleaning strategies. The H2O2/UV oxidation of source water prior to nanofiltration showed potential for the following: (i) mitigation of flux decline due to membrane fouling, (ii) removal of the pesticide alachlor and hydrogen sulfide, and (iii) improvement in membrane cleanability. Nonetheless, careful control of the preoxidation conditions was exercised to arrive at a reasonable compromise between fouling mitigation and NOM rejection.

Original languageEnglish (US)
Pages (from-to)143-160
Number of pages18
JournalJournal of Membrane Science
Volume241
Issue number1
DOIs
StatePublished - Sep 15 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Keywords

  • AFM
  • ATR-FTIR
  • DOC
  • MCL
  • MWCO
  • NOM
  • OCWD
  • atomic force microscopy
  • attenuated total reflection-Fourier transform infrared spectroscopy
  • dissolved organic carbon
  • maximum contaminant level
  • molecular weight cutoff
  • natural organic matter

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