Evaluation of the in situ, time-integrated DGT technique by monitoring changes in heavy metal concentrations in estuarine waters

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Title Evaluation of the in situ, time-integrated DGT technique by monitoring changes in heavy metal concentrations in estuarine waters
Author Dunn, Ryan Jay Keith; Teasdale, Peter; Warnken, Jan; Jordan, Mark; Arthur, Michael
Journal Name Environmental Pollution
Editor W.J. Manning
Year Published 2007
Place of publication Oxford, UK
Publisher Elsevier
Abstract Various natural and anthropogenic processes influence heavy metal concentrations within estuaries. In situ, time-integrated DGT measurements made over concurrent tidal phases found significantly higher concentrations of Cu (probability p = 0.017), Zn (p = 0.003) and Ni (p = 0.003) during the flood phase, because the incoming tide passes several point sources. DGT-reactive Cu concentrations significantly decreased with increased tidal-flushing and vice versa within a marina (correlation r = −0.788, p = 0.02). DGT measurements also recorded significant increases in Cu (4 out of 4 sites, p < 0.001) and Zn (3 out of 4 sites, p ≤ 0.015) after a 24 mm rainfall event. Finally, DGT-reactive Cu increased significantly (p < 0.001) during peak boating times, due to increased numbers of Cu-antifouled boats. This study demonstrates that, with judicious selection of deployment times, DGT measurements enable changes in heavy metal concentrations to be related to various cycles and events within estuaries.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.elsevier.com/wps/find/journaldescription.cws_home/405856/description#description
Alternative URI http://dx.doi.org/10.1016/j.envpol.2006.10.027
Copyright Statement Copyright 2007 Elsevier. Please refer to the journal's website for access to the definitive, published version. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher.
Volume 148
Page from 213
Page to 220
ISSN 0269-7491
Date Accessioned 2007-06-14
Date Available 2009-09-23T02:38:30Z
Language en_AU
Research Centre Australian Rivers Institute; Griffith Institute For Tourism; Environmental Futures Research Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Environmental Sciences
URI http://hdl.handle.net/10072/17690
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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