Acute toxicity evaluation of olive oil mill wastewaters: a comparative study of three aquatic organisms

Autor: Mendonca, E., Picado, A., Anselmo, A. M., Paixao, S. M.
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Zdroj: Environmental Toxicology; 1999, Vol. 14 Issue 2, p263, 0p
Abstrakt: Acute toxicity of olive mill wastewaters (traditional and continuousprocesses) collected from different regions of Portugal was evaluated using three test species (Vibrio fischeri formerly Photobacterium phosphoreum, Thamnocephatus platyurus, and Daphnia magna) and correlated with several physical and chemical parameters. Acute toxicity of these effluents, expressed in LC50 or EC50, ranged from: 0.16 to 1.24% in Microtox test, 0.73 to 12.54% in Thamnotoxkit F test, and 1.08 to 6.83% in Daphnia test. These values reflect the high toxicity of the olive mill wastewaters to all test species. Statistical analysis of the results shows a high correlation between the two microcrustacean bioassays. Microtox test did not correlate significantly with the other bioassays used. A significative correlation (p =/< 0.05) could also be established between L(E)C50 obtained in the microcrustacean tests and some physicochemical parameters of the effluent. (C) 1999 by John Wiley & Sons, Inc. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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