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Effect of organic complexation on the toxicity of Cu to the earthworm Eisenia fetida

Arnold, R. E., Hodson, M. E. and Comber, S. (2007) Effect of organic complexation on the toxicity of Cu to the earthworm Eisenia fetida. Applied Geochemistry, 22 (11). pp. 2397-2405. ISSN 0883-2927

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To link to this article DOI: 10.1016/j.apgeochem.2007.05.008

Abstract/Summary

The relationship between Cu speciation in solution and mortality and tissue Cu concentrations in Eisenia fetida was investigated. E. fetida were exposed to solutions containing 0.009, 0.049 and 0.125 mg Cu L-1 and 0, 0.15, 0.35 and 50 mg EDTA L-1. Mortalities of 100, 60, 50 and 25% were recorded in the 0.125 mg Cu L-1 solutions containing 0, 0.15, 0.35 and 50 mg EDTA L-1, respectively. Similarly tissue body burden decreased with increasing EDTA concentration. Complexation capacity of the solution increased with EDTA concentration. In the 0.125 mg Cu L-1 solution labile Cu concentration decreased with increasing EDTA concentration. These trends are attributed to complexation of free Cu ions with EDTA molecules, and the non-bioavailable nature of the resultant Cu-EDTA complex. (C) 2007 Elsevier Ltd. All rights reserved.

Item Type:Article
Divisions:Faculty of Science > School of Archaeology, Geography and Environmental Science > Department of Geography and Environmental Science
Faculty of Science > School of Archaeology, Geography and Environmental Science > Earth Systems Science
Interdisciplinary centres and themes > Soil Research Centre
ID Code:3207
Uncontrolled Keywords:BIOTIC LIGAND MODEL ACUTE COPPER TOXICITY DAPHNIA-MAGNA FIELD VALIDATION LUMBRICUS-TERRESTRIS RAINBOW-TROUT HUMIC-ACID WATER SOIL SPECIATION
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