Photodegradation of Australian freshwater microlayers and the implications for potable water management

Stuckey, Nicholas and Pittaway, Pam and Larsen, Kim (2010) Photodegradation of Australian freshwater microlayers and the implications for potable water management. In: 2nd Urban Water Security Research Alliance Science Forum and Stakeholder Engagement, 28-29 Sep 2010, Brisbane, Australia.

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Abstract

Photodegradation has been known to break down toxic compounds in potable water storages as well as degrading pesticides and herbicides in agricultural water storages. In this study, the concentration and reactivity of humic substances (HS) present in natural microlayers on water storages in South East Queensland (SEQ) was investigated. Microlayer and subsurface samples were taken from eight water storages with dissolved organic carbon (DOC) used to quantify HS concentration. The E2/E3 ratio (ratio of absorbance at 250 nm to 365 nm) was used to indicate the molecular weight of DOC compounds, and absorbance at 253.7 nm and the permanganate index were used to compare the reactivity of humified DOC. The concentration of carbonyl compounds in the microlayer was also investigated as carbonyls are considered the most photoreactive functional group present in HS. Preliminary results indicate that the concentration of humic substances and their chemical reactivity in SEQ water storages are highly variable, reflecting the characteristics of the water catchments.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Accepted version deposited in accordance woith the copyright policy of the publisher. © 2010 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.
Depositing User: Mr Nicholas Stuckey
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 16 Mar 2011 07:23
Last Modified: 03 Jul 2013 00:33
Uncontrolled Keywords: Australia; freshwater; photodegradation; potable water; management
Fields of Research (FOR2008): 10 Technology > 1002 Environmental Biotechnology > 100204 Environmental Biotechnology Diagnostics (incl. Biosensors)
09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
06 Biological Sciences > 0605 Microbiology > 060599 Microbiology not elsewhere classified
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9611 Physical and Chemical Conditions of Water > 961199 Physical and Chemical Conditions of Water not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/18666

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