Bioavailability and toxicity of arsenic to earthworms in three soils
Date
2012
Authors
Wijayawardena, M.A.A.
Mallavarapu, M.
Naidu, R.
Editors
Ng, J.C.
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Conference paper
Citation
Understanding the geological and medical interface of arsenic : As 2012 : 4th International Congress : Arsenic in the Environment, 2012 / Ng, J.C. (ed./s), pp.251-252
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Conference Name
4th International Congress on Arsenic in the Environment, As 2012 (22 Jul 2012 - 27 Jul 2012 : Cairns, Australia)
Abstract
The acute toxicity of arsenate [As(V)] and arsenite [As(III)] to the earthworm Eisenia fetida was studied in three different soils in order to provide basic toxicity and bioavailability data for formulating risk characterization benchmarks. Arsenic biotransformation in earthworms was also investigated to understand the mechanisms by which these organisms mitigate arsenic toxicity. Arsenic was more toxic to earthworms in acidic soil than in the alkaline soil. Earthworms transformed As(V) to more toxic As(III) which has implications to soil health.
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Copyright 2012 Taylor & Francis Group