Effect of river water, sediment and time on the toxicity and bioavailability of molinate to the marine bacterium Vibrio fischeri (Microtox)

Yin, LP; Warne, MSJ; Lim, RP

Effect of river water, sediment and time on the toxicity and bioavailability of molinate to the marine bacterium Vibrio fischeri (Microtox)

Yin, LP Warne, MSJ

Lim, RP

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Publication Type:: Journal Article
Citation:: Water Research, 2005, 39 (12), pp. 2738 - 2746
Issue Date:: 2005-01-01

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Field	Value	Language
dc.contributor.author	Yin, LP	en_US
dc.contributor.author	Warne, MSJ https://orcid.org/0000-0003-1804-7889	en_US
dc.contributor.author	Lim, RP https://orcid.org/0000-0002-4916-5688	en_US
dc.date.available	2005-04-24	en_US
dc.date.issued	2005-01-01	en_US
dc.identifier.citation	Water Research, 2005, 39 (12), pp. 2738 - 2746	en_US
dc.identifier.issn	0043-1354	en_US
dc.identifier.uri	http://hdl.handle.net/10453/3890
dc.description.abstract	The toxicity and bioavailability of molinate to Vibrio fischeri (Microtox®) were determined in both laboratory and river water in the absence and presence of sediment after 0, 24, 48, 72 and 96-h exposure. The bioavailability of molinate, expressed as 5 min EC50s (bioluminescence) and their fiducial limits calculated using initial measured concentrations, to V. fischeri in laboratory water in the absence and presence of sediment ranged from 1.8 (1.7-2.1) to 3.6 (3.5-3.7) mg L-1 and 1.3 (1.2-1.4) to 4.2 (3.5-4.5) mg L-1, respectively. The corresponding values in river water and river water plus sediment were 1.7 (1.6-1.8) to 3.8 (3.6-4.1) and 1.3 (1.3-1.4) to 4.6 (4.2-4.9) mg L-1, respectively. River water did not significantly (P>0.05) reduce the bioavailability of molinate to V. fischeri compared to that of laboratory water. However, the presence of sediment significantly (P<0.05) reduced the bioavailability of molinate to V. fischeri in both waters. The exposure time also significantly (P<0.05) reduced the bioavailability of molinate to V. fischeri in both waters in the presence and absence of sediment. The type of water did not significantly (P>0.05) affect the loss of molinate during the 96-h exposure period. However, the presence of sediment significantly (P<0.01) increased the loss of molinate from the test solutions, probably by binding to the sediment particles. Exposure period and concentration levels significantly (P<0.05) affected the loss of the herbicides over the 96 h. © 2005 Elsevier Ltd. All rights reserved.	en_US
dc.relation.ispartof	Water Research	en_US
dc.relation.isbasedon	10.1016/j.watres.2005.04.051	en_US
dc.subject.classification	Environmental Engineering	en_US
dc.subject.mesh	Thiocarbamates	en_US
dc.subject.mesh	Azepines	en_US
dc.subject.mesh	Herbicides	en_US
dc.subject.mesh	Water Pollutants, Chemical	en_US
dc.subject.mesh	Toxicity Tests	en_US
dc.subject.mesh	Water Microbiology	en_US
dc.subject.mesh	Rivers	en_US
dc.subject.mesh	Biological Availability	en_US
dc.subject.mesh	Geologic Sediments	en_US
dc.subject.mesh	Time Factors	en_US
dc.subject.mesh	Aliivibrio fischeri	en_US
dc.title	Effect of river water, sediment and time on the toxicity and bioavailability of molinate to the marine bacterium Vibrio fischeri (Microtox)	en_US
dc.type	Journal Article
utslib.citation.volume	12	en_US
utslib.citation.volume	39	en_US
utslib.for	0605 Microbiology	en_US
utslib.for	0602 Ecology	en_US
dc.location.activity	San Jose, USA
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of the Environment
utslib.copyright.status	closed_access
pubs.issue	12	en_US
pubs.publication-status	Published	en_US
pubs.volume	39	en_US

Abstract:

The toxicity and bioavailability of molinate to Vibrio fischeri (Microtox®) were determined in both laboratory and river water in the absence and presence of sediment after 0, 24, 48, 72 and 96-h exposure. The bioavailability of molinate, expressed as 5 min EC50s (bioluminescence) and their fiducial limits calculated using initial measured concentrations, to V. fischeri in laboratory water in the absence and presence of sediment ranged from 1.8 (1.7-2.1) to 3.6 (3.5-3.7) mg L-1 and 1.3 (1.2-1.4) to 4.2 (3.5-4.5) mg L-1, respectively. The corresponding values in river water and river water plus sediment were 1.7 (1.6-1.8) to 3.8 (3.6-4.1) and 1.3 (1.3-1.4) to 4.6 (4.2-4.9) mg L-1, respectively. River water did not significantly (P>0.05) reduce the bioavailability of molinate to V. fischeri compared to that of laboratory water. However, the presence of sediment significantly (P<0.05) reduced the bioavailability of molinate to V. fischeri in both waters. The exposure time also significantly (P<0.05) reduced the bioavailability of molinate to V. fischeri in both waters in the presence and absence of sediment. The type of water did not significantly (P>0.05) affect the loss of molinate during the 96-h exposure period. However, the presence of sediment significantly (P<0.01) increased the loss of molinate from the test solutions, probably by binding to the sediment particles. Exposure period and concentration levels significantly (P<0.05) affected the loss of the herbicides over the 96 h. © 2005 Elsevier Ltd. All rights reserved.

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http://hdl.handle.net/10453/3890