Characterization of clean and natural organic matter (NOM) fouled NF and UF membranes, and foulants characterization

Jaeweon Cho, Gary Amy, John Pellegrino, Yeomin Yoon

Research output: Contribution to journalConference articlepeer-review

242 Scopus citations

Abstract

Contact angles, zeta potentials, and IR spectra of clean and NOM-fouled membranes were compared to demonstrate differences in hydrophobicity, surface charge, and functional groups, respectively. Contact angle increased and decreased for membranes fouled with hydrophobic and hydrophilic NOM, respectively. Zeta potential decreased negatively (less negative) for membranes fouled with both hydrophobic and hydrophilic NOM, suggesting that ionizable functional groups were coated with non-ionizable NOM components (possibly neutrals). The IR spectra reduced in absorbance intensity for NOM-fouled membranes, suggesting that aromatic groups were coated with non-aromatic or less aromatic NOM components. The results of XAD-8/4 fractionations of foulants (desorbed NOM with NaOH) showed that hydrophilic and hydrophobic NOM components were the major foulants for membranes fouled with hydrophilic and hydrophobic NOM-source waters, respectively.

Original languageEnglish
Pages (from-to)101-108
Number of pages8
JournalDesalination
Volume118
Issue number1-3
DOIs
StatePublished - 20 Sep 1998
EventProceedings of the 1998 Conference on Membranes in Drinking and Industrial Water Production. Part 2 (of 3) - Amsterdam, Neth
Duration: 21 Sep 199824 Sep 1998

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