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Short-term (24 h) effects of mild and severe hypoxia (20% and 5% dissolved oxygen) on metal partitioning in highly contaminated estuarine sediments
Citation
Banks, J and Ross, DJ and Keough, MJ, Short-term (24 h) effects of mild and severe hypoxia (20% and 5% dissolved oxygen) on metal partitioning in highly contaminated estuarine sediments, Estuarine, Coastal and Shelf Science, 99 pp. 121-131. ISSN 0272-7714 (2012) [Refereed Article]
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Copyright Statement
Copyright 2012 Elsevier Ltd.
DOI: doi:10.1016/j.ecss.2011.12.025
Abstract
metal (Cd, Cu, Fe, Mn, Pb and Zn) partitioning within metal-contaminated sediments in replicated,
undisturbed sediment/water chambers show that even very brief periods of hypoxia may significantly
increase the dissolved fraction of these heavy metals within contaminated sediments, increasing their
potential for ecological harm. This study used treatments consisting of three DO levels (75%, 20% and 5%
saturation) representing ambient conditions, mild hypoxia and severe hypoxia. Although contaminant
loads were very high in these sediments, pore-water concentrations were relatively low. Total sediment
and dilute acid (1 M HCl) extracted metals were unaffected by low DO treatments but a diffusive gradient
in thin-films samplers (DGTs), detected a two-fold increase in pore-water Cd and a five-fold increase in
pore-water Cu in surface sediments (0e3 cm depth) under low oxygen conditions.
Item Details
Item Type: | Refereed Article |
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Keywords: | metal pollution, hypoxia, DGT, estuarine sediment |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Fisheries sciences |
Research Field: | Aquaculture and fisheries stock assessment |
Objective Division: | Environmental Management |
Objective Group: | Terrestrial systems and management |
Objective Field: | Assessment and management of terrestrial ecosystems |
UTAS Author: | Ross, DJ (Associate Professor Jeff Ross) |
ID Code: | 77735 |
Year Published: | 2012 |
Web of Science® Times Cited: | 13 |
Deposited By: | Sustainable Marine Research Collaboration |
Deposited On: | 2012-05-22 |
Last Modified: | 2014-11-06 |
Downloads: | 0 |
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