| Autor: |
Zhengkai Li1 liz@mar.dfo-mpo.gc.ca, Lee, Kenneth1, Cobanli, Susan E.1, King, Thomas1, Wrenn, Brian A.2, Doe, Kenneth G.3, Jackman, Paula M.3, Venosa, Albert D.4 |
| Předmět: |
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| Zdroj: |
Environmental Toxicology. Feb2007, Vol. 22 Issue 1, p1-8. 8p. |
| Abstrakt: |
The potential ecological impacts of anaerobic degradation of vegetable oil on freshwater sediments were investigated. Sediment toxicity was evaluated using two regulatory biotests: the Microtox® Solid Phase Test and an amphipod (Hyalella azteca) bioassay. The results of the Microtox test showed that the toxicity of the vegetable-oil-contaminated sediments (about 17-33 g oil/kg dry sediments) increased after 2 weeks incubation and then decreased to near background levels after incubation for 8 weeks under anaerobic conditions. The amphipod toxicity bioassay showed that the toxicity of fresh contaminated sediments decreased over time and returned to background levels within 8 weeks. These results suggest that the impact of vegetable oils on organisms within sediments may be limited. To account for the significance of environmental conditions, additional studies over a wide range of incubation conditions (e.g., temperature, nutrient concentration) and other test organisms at various trophic levels are recommended for both acute and chronic toxicity assessment. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
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