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Rejection of small solutes by reverse osmosis membranes for water reuse applications: A pilot-scale study

Journal Article


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Abstract


  • N-nitrosamines and boron are small solutes of particular concern during water recycling applications. Here, we

    evaluated the rejection of seven N-nitrosamines and boron under a range of operating conditions and feed

    solution characteristics. The evaluationwas conducted using a pilot-scale reverse osmosis (RO) system to appropriately

    simulate hydrodynamic conditions of full-scale RO installations. The rejection of seven N-nitrosamines

    by the pilot RO system varied significantly in the range from 31 to 94%, and rejection increased in the increasing

    order of their molecular weight. Rejection values obtained from this pilot-scale study were lower than those

    previously reported in laboratory-scale studies. These discrepancieswere attributed to a difference in RO system

    operating condition (i.e. recovery) between the pilot-scale study (25%) and laboratory-scale study (b0.1%).

    Nevertheless, rejection data reported here validate the recent findings fromlaboratory-scale studies with respect

    to the impact of permeate flux, feed temperature and feed pH on separation efficiencies of N-nitrosamines. Data

    obtained from this pilot-scale study also validate the strong correlation between boron and NDMA rejection at or

    below pH 8 regardless of operating conditions and feed solution characteristics. The results suggest that boron

    rejection can be used as a surrogate for NDMA rejection in full-scale RO installations.

Authors


  •   Fujioka, Takahiro (external author)
  •   Tu, Kha L. (external author)
  •   Khan, Stuart J. (external author)
  •   McDonald, James A. (external author)
  •   Roux, Annalie (external author)
  •   Poussade, Yvan (external author)
  •   Drewes, Jörg E. (external author)
  •   Nghiem, Long D.

Publication Date


  • 2014

Citation


  • Fujioka, T., Tu, K. L., Khan, S., McDonald, J., Roux, A., Poussade, Y., Drewes, J. & Nghiem, L. (2014). Rejection of small solutes by reverse osmosis membranes for water reuse applications: A pilot-scale study. Desalination, 350 28-34.

Scopus Eid


  • 2-s2.0-84904646362

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4867&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3848

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 28

End Page


  • 34

Volume


  • 350

Place Of Publication


  • Netherlands

Abstract


  • N-nitrosamines and boron are small solutes of particular concern during water recycling applications. Here, we

    evaluated the rejection of seven N-nitrosamines and boron under a range of operating conditions and feed

    solution characteristics. The evaluationwas conducted using a pilot-scale reverse osmosis (RO) system to appropriately

    simulate hydrodynamic conditions of full-scale RO installations. The rejection of seven N-nitrosamines

    by the pilot RO system varied significantly in the range from 31 to 94%, and rejection increased in the increasing

    order of their molecular weight. Rejection values obtained from this pilot-scale study were lower than those

    previously reported in laboratory-scale studies. These discrepancieswere attributed to a difference in RO system

    operating condition (i.e. recovery) between the pilot-scale study (25%) and laboratory-scale study (b0.1%).

    Nevertheless, rejection data reported here validate the recent findings fromlaboratory-scale studies with respect

    to the impact of permeate flux, feed temperature and feed pH on separation efficiencies of N-nitrosamines. Data

    obtained from this pilot-scale study also validate the strong correlation between boron and NDMA rejection at or

    below pH 8 regardless of operating conditions and feed solution characteristics. The results suggest that boron

    rejection can be used as a surrogate for NDMA rejection in full-scale RO installations.

Authors


  •   Fujioka, Takahiro (external author)
  •   Tu, Kha L. (external author)
  •   Khan, Stuart J. (external author)
  •   McDonald, James A. (external author)
  •   Roux, Annalie (external author)
  •   Poussade, Yvan (external author)
  •   Drewes, Jörg E. (external author)
  •   Nghiem, Long D.

Publication Date


  • 2014

Citation


  • Fujioka, T., Tu, K. L., Khan, S., McDonald, J., Roux, A., Poussade, Y., Drewes, J. & Nghiem, L. (2014). Rejection of small solutes by reverse osmosis membranes for water reuse applications: A pilot-scale study. Desalination, 350 28-34.

Scopus Eid


  • 2-s2.0-84904646362

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4867&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3848

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 28

End Page


  • 34

Volume


  • 350

Place Of Publication


  • Netherlands