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

Paper

Stuckey, Nicholas, Pittaway, Pam and Larsen, Kim. 2010. "Photodegradation of Australian freshwater microlayers and the implications for potable water management." Begbie, D. K. and Wakem, S. L. (ed.) 2nd Urban Water Security Research Alliance Science Forum and Stakeholder Engagement. Brisbane, Australia 28 - 29 Sep 2010 Brisbane, Australia.
Paper/Presentation Title

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

Presentation TypePaper
AuthorsStuckey, Nicholas (Author), Pittaway, Pam (Author) and Larsen, Kim (Author)
EditorsBegbie, D. K. and Wakem, S. L.
Journal or Proceedings Title2nd Urban Water Security Research Alliance Science Forum and Stakeholder Engagement: Program and Abstracts
Number of Pages2
Year2010
Place of PublicationBrisbane, Australia
Web Address (URL) of Paperhttp://www.urbanwateralliance.org.au/publications/forum-2nd-2010/science-forum-2010-program-abstracts.pdf
Conference/Event2nd Urban Water Security Research Alliance Science Forum and Stakeholder Engagement
Event Details
2nd Urban Water Security Research Alliance Science Forum and Stakeholder Engagement
Event Date
28 to end of 29 Sep 2010
Event Location
Brisbane, Australia
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.

KeywordsAustralia; freshwater; photodegradation; potable water; management
ANZSRC Field of Research 2020410304. Environmental biotechnology diagnostics (incl. biosensors)
400513. Water resources engineering
310799. Microbiology not elsewhere classified
Public Notes

File reproduced in accordance with the copyright policy of the publisher/author.

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