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Nanofiltration of trace organic chemicals: a comparison between ceramic and polymeric membrane

Journal Article


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Abstract


  • The rejection of 41 trace organic chemicals (TrOCs) by a ceramic nanofiltration (NF) membrane was examined and compared with that by two polyamide-based NF membranes – namely NF90 and NF270. Rejection behaviours of TrOCs by the ceramic and polymeric NF membranes were mostly similar but there were several notable differences. The rejection of neutral TrOCs by the ceramic and polymeric NF membranes increased in the order of increasing molecular size (e.g. minimum projection area), indicating that size exclusion is the dominant mechanism governing rejection. However, in contrast to the polymeric NF membranes, where hydrophobic interaction between membrane and TrOCs influenced the rejection of neutral molecules, the impact of hydrophobic interaction was not significant for the ceramic NF membrane. The rejection of low molecular weight TrOCs increased in the order of NF270, NF90 and ceramic NF membranes, while molecular weight cut-off increased in the order of ceramic NF, NF270 and NF90 membranes. A notable difference of about 20% in rejection between positively and negatively charged TrOCs of similar molecular size was observed for the ceramic NF membrane but not the two polymeric ones. The results indicate that electrostatic repulsion and attraction of charged TrOCs with the ceramic membrane differ from those with polymeric membrane materials.

Authors


  •   Fujioka, Takahiro (external author)
  •   Khan, Stuart J. (external author)
  •   McDonald, James A. (external author)
  •   Nghiem, Long D.

Publication Date


  • 2014

Citation


  • Fujioka, T., Khan, S. J., McDonald, J. A. & Nghiem, L. D. (2014). Nanofiltration of trace organic chemicals: a comparison between ceramic and polymeric membrane. Separation and Purification Technology, 136 (November), 258-264.

Scopus Eid


  • 2-s2.0-84908554453

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3939&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2930

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 258

End Page


  • 264

Volume


  • 136

Issue


  • November

Place Of Publication


  • United Kingdom

Abstract


  • The rejection of 41 trace organic chemicals (TrOCs) by a ceramic nanofiltration (NF) membrane was examined and compared with that by two polyamide-based NF membranes – namely NF90 and NF270. Rejection behaviours of TrOCs by the ceramic and polymeric NF membranes were mostly similar but there were several notable differences. The rejection of neutral TrOCs by the ceramic and polymeric NF membranes increased in the order of increasing molecular size (e.g. minimum projection area), indicating that size exclusion is the dominant mechanism governing rejection. However, in contrast to the polymeric NF membranes, where hydrophobic interaction between membrane and TrOCs influenced the rejection of neutral molecules, the impact of hydrophobic interaction was not significant for the ceramic NF membrane. The rejection of low molecular weight TrOCs increased in the order of NF270, NF90 and ceramic NF membranes, while molecular weight cut-off increased in the order of ceramic NF, NF270 and NF90 membranes. A notable difference of about 20% in rejection between positively and negatively charged TrOCs of similar molecular size was observed for the ceramic NF membrane but not the two polymeric ones. The results indicate that electrostatic repulsion and attraction of charged TrOCs with the ceramic membrane differ from those with polymeric membrane materials.

Authors


  •   Fujioka, Takahiro (external author)
  •   Khan, Stuart J. (external author)
  •   McDonald, James A. (external author)
  •   Nghiem, Long D.

Publication Date


  • 2014

Citation


  • Fujioka, T., Khan, S. J., McDonald, J. A. & Nghiem, L. D. (2014). Nanofiltration of trace organic chemicals: a comparison between ceramic and polymeric membrane. Separation and Purification Technology, 136 (November), 258-264.

Scopus Eid


  • 2-s2.0-84908554453

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3939&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2930

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 258

End Page


  • 264

Volume


  • 136

Issue


  • November

Place Of Publication


  • United Kingdom