Photodegradation of dissolved organic matter: the impact on monolayers

Stuckey, N. G. and Pittaway, P. A. and Larsen, K. (2012) Photodegradation of dissolved organic matter: the impact on monolayers. In: UWSRA 2012: Science Forum and Stakeholder Engagement: Building Linkages, Collaboration and Science Quality, 19-20 Jun 2012, Brisbane, Australia.

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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.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: © 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.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 19 Jun 2013 01:37
Last Modified: 15 Sep 2017 03:20
Uncontrolled Keywords: monolayers; photodegradation; dissolved organic matter
Fields of Research : 05 Environmental Sciences > 0502 Environmental Science and Management > 050209 Natural Resource Management
03 Chemical Sciences > 0399 Other Chemical Sciences > 039901 Environmental Chemistry (incl. Atmospheric Chemistry)
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
Socio-Economic Objective: D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961103 Physical and Chemical Conditions of Water in Fresh, Ground and Surface Water Environments (excl. Urban and Industrial Use)
URI: http://eprints.usq.edu.au/id/eprint/22125

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