Photodegradation of dissolved organic matter: the impact on monolayers

Paper

Stuckey, N. G., Pittaway, P. A. and Larsen, K.. 2012. "Photodegradation of dissolved organic matter: the impact on monolayers." Begbie, D. K., Kenway, S. J., Biermann, S. M. and Wakem, S. L. (ed.) UWSRA 2012: Science Forum and Stakeholder Engagement: Building Linkages, Collaboration and Science Quality. Brisbane, Australia 19 - 20 Jun 2012 Brisbane, Australia.
Paper/Presentation Title

Photodegradation of dissolved organic matter: the impact on monolayers

Presentation TypePaper
AuthorsStuckey, N. G. (Author), Pittaway, P. A. (Author) and Larsen, K. (Author)
EditorsBegbie, D. K., Kenway, S. J., Biermann, S. M. and Wakem, S. L.
Journal or Proceedings TitleProceedings of the 4th Urban Water Security Research Alliance Science Forum (UWSRA 2012)
Number of Pages6
Year2012
Place of PublicationBrisbane, Australia
Web Address (URL) of Paperhttp://www.urbanwateralliance.org.au
Conference/EventUWSRA 2012: Science Forum and Stakeholder Engagement: Building Linkages, Collaboration and Science Quality
Event Details
UWSRA 2012: Science Forum and Stakeholder Engagement: Building Linkages, Collaboration and Science Quality
Event Date
19 to end of 20 Jun 2012
Event Location
Brisbane, Australia
Abstract

The loss of monolayer compounds from the surface of a water body is one of the major causes of variable field performance in reducing evaporative loss. The degradation of susceptible molecules by indirect photochemical reactions involving dissolved organic matter (DOM) in the aquatic microlayer may occur within minutes, reducing the half-life of the molecule by up to 94%. The susceptibility of three commercially available monolayer compounds Hexadecanol, Octadecanol and 2-octadecoxyethanol to indirect photodegradation was assessed using water sampled from eight water bodies (including clear, brown, turbid brown and black water bodies) in South East Queensland (SEQ). A decision matrix was developed using water quality attributes such as colour, source water, catchment type and season, to select the most appropriate monolayer based on photoreactivity of the dissolved organic matter in the water body.

Keywordsmonolayers; photodegradation; dissolved organic matter
ANZSRC Field of Research 2020410406. Natural resource management
370104. Atmospheric composition, chemistry and processes
300201. Agricultural hydrology
Public Notes

© 2012 CSIRO To the extent permitted by law, all rights are reserved and no part of this publication covered by copyright may be reproduced or copied in any form or by any means except with the written permission of CSIRO. This paper was not refereed.

Byline AffiliationsNational Centre for Engineering in Agriculture
Faculty of Sciences
Institution of OriginUniversity of Southern Queensland
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