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Development of a methodology to investigate the importance of chemical speciation on the bioavailability of contaminants to Eisenia andrei

Arnold, R. E., Langdon, C. J., Hodson, M. E. and Black, S. (2003) Development of a methodology to investigate the importance of chemical speciation on the bioavailability of contaminants to Eisenia andrei. PEDOBIOLOGIA , 47 (5-6). pp. 633-639.

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To link to this article DOI: 10.1078/0031-4056-00238

Abstract/Summary

The uptake of metals by earthworms occurs predominantly via the soil pore water, or via an uptake route which is related to the soil pore water metal concentration. However, it has been suggested that the speciation of the metal is also important. A novel technique is described which exposes Eisenia andrei Bouche to contaminant bearing solutions in which the chemical factors affecting its speciation may be individually and systematically manipulated. In a preliminary experiment, the LC50 for copper nitrate was 0.046 mg l(-1) (95 % confidence intervals: 0.03 and 0.07 mg l(-1)). There was a significant positive correlation between earthworm mortality and bulk copper concentration in solution (R-2 = 0.88, P less than or equal to 0.001), and a significant positive increase in earthworm tissue copper concentration with increasing copper concentration in solution (R-2 = 0.97, P less than or equal to 0.001). It is anticipated that quantifying the effect of soil solution chemical speciation on copper bioavailability will provide an excellent aid to understanding the importance of chemical composition and the speciation of metals, in the calculation of toxicological parameters.

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 > Department of Archaeology
Faculty of Science > School of Archaeology, Geography and Environmental Science > Scientific Archaeology
Faculty of Science > School of Archaeology, Geography and Environmental Science > Earth Systems Science
Interdisciplinary centres and themes > Soil Research Centre
ID Code:3209
Uncontrolled Keywords:copper speciation earthworms soil solution bioavailability
Additional Information: Conference Information: 7th International Symposium on Earthworm Ecology (ISEE7) CARDIFF, ENGLAND, SEP 01-06, 2002

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