Skip to main content
placeholder image

Factors governing the rejection of trace organic contaminants by nanofiltration and reverse osmosis membranes

Journal Article


Download full-text (Open Access)

Abstract


  • This study aimed to elucidate key factors governing the rejection of trace organic contaminants (TrOCs) by nanofiltration (NF) and reverse osmosis (RO) membranes. The rejection of 16 selected hydrophilic and hydrophobic TrOCs by an NF and an RO membranes was evaluated at different solution pH values using a cross-flow NF/RO filtration system. An analytical technique consisting of solid phase extraction followed by gas chromatography and mass spectrometry detection was used for the analysis of the TrOCs. In general, rejection increased in the order of decreasing membrane permeability, increasing molecular weight (or equivalent molecular width) of the TrOCs, and increasing hydrophilicity. Adsorption of hydrophobic TrOCs to the membrane could be observed based on a mass balance calculation. However, the correlation between adsorption and log D value (the logarithm of the octanol-water distribution coefficient) of the TrOCs (which indicates their hydrophobicity) observed in this study was rather weak. This is due to the adsorption being not only dependent on hydrophobicity, but also on other physicochemical aspects of TrOCs and the membrane material, such as molecular size, charge of the compounds, pore size, charge, and surface roughness properties of the membranes. Therefore, the results suggest that these factors may also govern the adsorption (and subsequently rejection) of TrOCs to NF/RO membranes.

Authors


  •   Dang, Hai Q. (external author)
  •   Nghiem, Long D. (external author)
  •   Price, William E.

Publication Date


  • 2014

Citation


  • Dang, H. Q., Nghiem, L. D. & Price, W. E. (2014). Factors governing the rejection of trace organic contaminants by nanofiltration and reverse osmosis membranes. Desalination and Water Treatment, 52 (4-6), 589-599.

Scopus Eid


  • 2-s2.0-84893844936

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2437&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/1419

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 589

End Page


  • 599

Volume


  • 52

Issue


  • 4-6

Place Of Publication


  • United Kingdom

Abstract


  • This study aimed to elucidate key factors governing the rejection of trace organic contaminants (TrOCs) by nanofiltration (NF) and reverse osmosis (RO) membranes. The rejection of 16 selected hydrophilic and hydrophobic TrOCs by an NF and an RO membranes was evaluated at different solution pH values using a cross-flow NF/RO filtration system. An analytical technique consisting of solid phase extraction followed by gas chromatography and mass spectrometry detection was used for the analysis of the TrOCs. In general, rejection increased in the order of decreasing membrane permeability, increasing molecular weight (or equivalent molecular width) of the TrOCs, and increasing hydrophilicity. Adsorption of hydrophobic TrOCs to the membrane could be observed based on a mass balance calculation. However, the correlation between adsorption and log D value (the logarithm of the octanol-water distribution coefficient) of the TrOCs (which indicates their hydrophobicity) observed in this study was rather weak. This is due to the adsorption being not only dependent on hydrophobicity, but also on other physicochemical aspects of TrOCs and the membrane material, such as molecular size, charge of the compounds, pore size, charge, and surface roughness properties of the membranes. Therefore, the results suggest that these factors may also govern the adsorption (and subsequently rejection) of TrOCs to NF/RO membranes.

Authors


  •   Dang, Hai Q. (external author)
  •   Nghiem, Long D. (external author)
  •   Price, William E.

Publication Date


  • 2014

Citation


  • Dang, H. Q., Nghiem, L. D. & Price, W. E. (2014). Factors governing the rejection of trace organic contaminants by nanofiltration and reverse osmosis membranes. Desalination and Water Treatment, 52 (4-6), 589-599.

Scopus Eid


  • 2-s2.0-84893844936

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2437&context=smhpapers

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/1419

Has Global Citation Frequency


Number Of Pages


  • 10

Start Page


  • 589

End Page


  • 599

Volume


  • 52

Issue


  • 4-6

Place Of Publication


  • United Kingdom