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Removal of N-nitrosamines by an aerobic membrane bioreactor

Journal Article


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Abstract


  • This study investigated the fate of eight N-nitrosamines during membrane bioreactor (MBR) treatment. The results suggest that biodegradation is mainly responsible for the removal of N-nitrosamines during MBR treatment. Other removal mechanisms were insignificant (e.g. adsorption to sludge) or not expected (e.g. photolysis and volatilization) given the experimental conditions and physicochemical properties of the N-nitrosamines studied here. N-nitrosamine removal efficiencies were from 24% to 94%, depending on their molecular properties. High removal of N-nitrosamines such as N-nitrosodimethylamine and N-nitrosodiethylamine could be explained by the presence of strong electron donating functional groups (EDG) in their structure. In contrast, N-nitrosomorpholine possessing the weak EDG morpholine was persistent to biodegradation. The removal efficiency of N-nitrosomorpholine was 24% and was the lowest amongst all N-nitrosamines investigated in this study. © 2013.

Authors


  •   Wijekoon, Kaushalya (external author)
  •   Fujioka, Takahiro (external author)
  •   McDonald, James A. (external author)
  •   Khan, Stuart J. (external author)
  •   Hai, Faisal I.
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2013

Citation


  • Wijekoon, K. C., Fujioka, T., McDonald, J. A., Khan, S. J., Hai, F. I., Price, W. E. & Nghiem, L. D. (2013). Removal of N-nitrosamines by an aerobic membrane bioreactor. Bioresource Technology, 141 41-45.

Scopus Eid


  • 2-s2.0-84878932640

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2048&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1039

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 41

End Page


  • 45

Volume


  • 141

Place Of Publication


  • Netherlands

Abstract


  • This study investigated the fate of eight N-nitrosamines during membrane bioreactor (MBR) treatment. The results suggest that biodegradation is mainly responsible for the removal of N-nitrosamines during MBR treatment. Other removal mechanisms were insignificant (e.g. adsorption to sludge) or not expected (e.g. photolysis and volatilization) given the experimental conditions and physicochemical properties of the N-nitrosamines studied here. N-nitrosamine removal efficiencies were from 24% to 94%, depending on their molecular properties. High removal of N-nitrosamines such as N-nitrosodimethylamine and N-nitrosodiethylamine could be explained by the presence of strong electron donating functional groups (EDG) in their structure. In contrast, N-nitrosomorpholine possessing the weak EDG morpholine was persistent to biodegradation. The removal efficiency of N-nitrosomorpholine was 24% and was the lowest amongst all N-nitrosamines investigated in this study. © 2013.

Authors


  •   Wijekoon, Kaushalya (external author)
  •   Fujioka, Takahiro (external author)
  •   McDonald, James A. (external author)
  •   Khan, Stuart J. (external author)
  •   Hai, Faisal I.
  •   Price, William E.
  •   Nghiem, Long D. (external author)

Publication Date


  • 2013

Citation


  • Wijekoon, K. C., Fujioka, T., McDonald, J. A., Khan, S. J., Hai, F. I., Price, W. E. & Nghiem, L. D. (2013). Removal of N-nitrosamines by an aerobic membrane bioreactor. Bioresource Technology, 141 41-45.

Scopus Eid


  • 2-s2.0-84878932640

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=2048&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/1039

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 41

End Page


  • 45

Volume


  • 141

Place Of Publication


  • Netherlands