Skip to main content

Effects of feed and draw solution temperature and transmembrane temperature difference on the rejection of trace organic contaminants by forward osmosis

Journal Article


Download full-text (Open Access)

Abstract


  • The effects of feed and draw solution temperature and transmembrane temperature difference on the

    rejection of 12 trace organic contaminants (TrOCs) by two forward osmosis (FO) membranes were

    investigated. The membrane structure parameter (S) and the reverse salt (NaCl) flux selectivity (RSFS)

    were constant over the temperature range of 20–40 1C, suggesting that within this range, the solution

    temperature did not significantly influence the membrane polymeric structure. Draw solution properties,

    including diffusivity, viscosity, and osmotic pressure, played an important role in water and reverse salt

    (NaCl) flux behaviour and TrOC rejection. Pure water and salt (NaCl) permeability coefficients of the two

    forward osmosis membranes increased as both the feed and draw solution temperatures increased from

    20 to 40 1C due to an increase in solute diffusivity and a decrease in water viscosity. Rejection of charged

    TrOCs was higher than that of neutral TrOCs and their rejection was insensitive to temperature variation.

    On the other hand, rejection of neutral TrOCs decreased significantly when the feed and draw solution

    temperatures were 40 and 20 1C, respectively, due to the increase in their diffusivity at an elevated

    temperature. By contrast, rejection of neutral TrOCs increased when the feed and draw solution

    temperatures were 20 and 40 1C, respectively. The reverse salt (NaCl) flux increased due to an increase

    in the draw solute diffusivity. In addition, at a higher draw solution temperature, the dilution effect

    induced by higher water flux and the hindrance effect enhanced by a higher reverse salt (NaCl) flux led to

    the increase in the rejection of neutral TrOCs.

Authors


  •   Xie, Ming (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)
  •   Elimelech, Menachem (external author)

Publication Date


  • 2013

Citation


  • Xie, M., Price, W. E., Nghiem, L. D. & Elimelech, M. (2013). Effects of feed and draw solution temperature and transmembrane temperature difference on the rejection of trace organic contaminants by forward osmosis. Journal of Membrane Science, 438 57-64.

Scopus Eid


  • 2-s2.0-84876441661

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1644&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/638

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 57

End Page


  • 64

Volume


  • 438

Place Of Publication


  • Netherlands

Abstract


  • The effects of feed and draw solution temperature and transmembrane temperature difference on the

    rejection of 12 trace organic contaminants (TrOCs) by two forward osmosis (FO) membranes were

    investigated. The membrane structure parameter (S) and the reverse salt (NaCl) flux selectivity (RSFS)

    were constant over the temperature range of 20–40 1C, suggesting that within this range, the solution

    temperature did not significantly influence the membrane polymeric structure. Draw solution properties,

    including diffusivity, viscosity, and osmotic pressure, played an important role in water and reverse salt

    (NaCl) flux behaviour and TrOC rejection. Pure water and salt (NaCl) permeability coefficients of the two

    forward osmosis membranes increased as both the feed and draw solution temperatures increased from

    20 to 40 1C due to an increase in solute diffusivity and a decrease in water viscosity. Rejection of charged

    TrOCs was higher than that of neutral TrOCs and their rejection was insensitive to temperature variation.

    On the other hand, rejection of neutral TrOCs decreased significantly when the feed and draw solution

    temperatures were 40 and 20 1C, respectively, due to the increase in their diffusivity at an elevated

    temperature. By contrast, rejection of neutral TrOCs increased when the feed and draw solution

    temperatures were 20 and 40 1C, respectively. The reverse salt (NaCl) flux increased due to an increase

    in the draw solute diffusivity. In addition, at a higher draw solution temperature, the dilution effect

    induced by higher water flux and the hindrance effect enhanced by a higher reverse salt (NaCl) flux led to

    the increase in the rejection of neutral TrOCs.

Authors


  •   Xie, Ming (external author)
  •   Price, William E.
  •   Nghiem, Long D. (external author)
  •   Elimelech, Menachem (external author)

Publication Date


  • 2013

Citation


  • Xie, M., Price, W. E., Nghiem, L. D. & Elimelech, M. (2013). Effects of feed and draw solution temperature and transmembrane temperature difference on the rejection of trace organic contaminants by forward osmosis. Journal of Membrane Science, 438 57-64.

Scopus Eid


  • 2-s2.0-84876441661

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1644&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/638

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 57

End Page


  • 64

Volume


  • 438

Place Of Publication


  • Netherlands