Recovery of a freshwater wetland from chemical contamination after an oil spill

Bi, HP, Rissik, D, Macova, M, Hearn, L, Mueller, JF and Escher, B (2011) Recovery of a freshwater wetland from chemical contamination after an oil spill. Journal of Environmental Monitoring, 13 3: 713-720. doi:10.1039/c0em00406e


Author Bi, HP
Rissik, D
Macova, M
Hearn, L
Mueller, JF
Escher, B
Title Recovery of a freshwater wetland from chemical contamination after an oil spill
Journal name Journal of Environmental Monitoring   Check publisher's open access policy
ISSN 1464-0325
1464-0333
Publication date 2011-03
Sub-type Article (original research)
DOI 10.1039/c0em00406e
Open Access Status Not Open Access
Volume 13
Issue 3
Start page 713
End page 720
Total pages 8
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Collection year 2012
Language eng
Abstract In March 2009, a cargo ship spilled 250 tons of heavy fuel oil off the Queensland coast of Australia. The pristine National Park Moreton Island, seven nautical miles to the east of the spill site, was most affected by the oil slick. Contamination of the island's shoreline was widespread, with freshwater wetlands particularly slow to recover as clean-up needed to be carefully managed to avoid damage to this sensitive ecosystem. During the clean-up process on Moreton Island a monitoring program was initiated using traditional chemical analysis in combination with bioanalytical techniques to assess the extent and variability in contamination at sites on the shoreline and freshwater wetlands. Water accommodated fractions (WAF) of oil residues from samples taken directly after the spill on the shoreline showed the same level of toxic potency as samples from the wetland while baseline-toxicity equivalent concentrations (baseline-TEQ) and 2,3,7,8-tetrachlorodibenzodioxin equivalent concentrations (TCDDEQ) were much lower in oil collected from the sandy beach. The umuC assay for genotoxicity and the E-SCREEN assay for estrogenic effects indicated the extracts were not genotoxic or estrogenic. PAH concentrations and toxicity in grab water samples were below detectable levels, however, extracts from time integrated silicone passive samplers deployed for several weeks at the contaminated sites gave measurable responses in the bioassays with TCDDEQ levels increased relative to the control site. The low levels of baseline-TEQ and TCDDEQ present after 8 months had further decreased 6 months later indicating satisfactory recovery of this pristine ecosystem after an oil spill. © 2011 The Royal Society of Chemistry.
Keyword E-Screen assay
Environmental-samples
Base-line
Toxicity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
National Research Centre for Environmental Toxicology Publications
 
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Created: Sun, 27 Mar 2011, 00:06:44 EST