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Approche méthodologique de l’évaluation des risques écotoxicologiques liés à la mise en dépôt sur sol de sédiments de dragage

Abstract : The implementation of an ecological risk assessment framework is presented for dredged material deposits on soil closed to a canal and a groundwater, and tested with sediment samples from a French North-Eastern canal. This framework includes two steps: a screening risk assessment, based on contaminant concentrations, and a detailed risk assessment based on toxicity bioassays and column leaching tests. The tested framework includes three assumptions, which are related (a) to effects to plants (Lolium perenne L.), (b) effects to aquatic organisms (Escherichia coli, Chlorella vulgaris, Ceriodaphnia dubia, and Xenopus laevis) and (c) to groundwater contamination. Several exposure conditions were tested, including standardised bioassays. According to the specific tested sediments, the three assumptions were more or less discriminatory, soil and groundwater pollution being the most sensitives. The assessment procedure has to be improved on several aspects, particularly assessment endpoint design for risk to ecosystems (e.g.: integration of pollutants bioaccumulation), bioassays protocols and column leaching test design.
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https://hal.inrae.fr/hal-02679083
Contributor : Migration Prodinra <>
Submitted on : Wednesday, April 28, 2021 - 6:29:20 AM
Last modification on : Wednesday, May 19, 2021 - 10:38:02 AM

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Yves Perrodin, Marc Babut, J.P. Bedell, M. Bray, Bruno Clément, et al.. Approche méthodologique de l’évaluation des risques écotoxicologiques liés à la mise en dépôt sur sol de sédiments de dragage. Déchets Sciences et Techniques, INSA de Lyon 2004, 34, pp.4-13. ⟨10.4267/dechets-sciences-techniques.2072⟩. ⟨hal-02679083⟩

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