Assessment of ecotoxicological risks related to depositing dredged materials from canals in northern France on soil.
The implementation of an ecological risk assessment framework is presented for dredged material deposits on soil close to a canal and groundwater, and tested with sediment samples from canals in northern France. This framework includes two steps: a simplified risk assessment based on contaminant concentrations and a detailed risk assessment based on toxicity bioassays and column leaching tests. The tested framework includes three related assumptions: (a) effects on plants (Lolium perenne L.), (b) effects on aquatic organisms (Escherichia coli, Pseudokirchneriella subcapitata, Ceriodaphnia dubia, and Xenopus laevis) and (c) effects on groundwater contamination. Several exposure conditions were tested using standardised bioassays. According to the specific dredged material tested, the three assumptions were more or less discriminatory, soil and groundwater pollution being the most sensitive. Several aspects of the assessment procedure must now be improved, in particular assessment endpoint design for risks to ecosystems (e.g., integration of pollutant bioaccumulation), bioassay protocols and column leaching test design.
Perrodin
Yves
Y
Ecole Nationale des Travaux Publics de l'Etat, France. perrodin@entpe.fr
Babut
Marc
M
Bedell
Jean-Philippe
JP
Bray
Marc
M
Clement
Bernard
B
Delolme
Cécile
C
Devaux
Alain
A
Durrieu
Claude
C
Garric
Jeanne
J
Montuelle
Bernard
B
D000818:Animals; D000460:Chlorophyta / Q000187:drug effects / Q000254:growth & development; D033361:Cladocera / Q000187:drug effects / Q000502:physiology; D004926:Escherichia coli / Q000187:drug effects / Q000201:enzymology; D005618:Fresh Water; D019015:Geologic Sediments; D018525:Germination / Q000187:drug effects; D008129:Lolium / Q000187:drug effects / Q000254:growth & development; D019216:Metals, Heavy / Q000032:analysis / Q000633:toxicity; D019055:No-Observed-Adverse-Effect Level; D011078:Polychlorinated Biphenyls / Q000032:analysis / Q000633:toxicity; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity; D018570:Risk Assessment; D012989:Soil Pollutants / Q000032:analysis / Q000633:toxicity*; D018505:Waste Management / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*; D014982:Xenopus laevis / Q000502:physiology; D001616:beta-Galactosidase / Q000037:antagonists & inhibitors
D019216:Metals, Heavy; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls; D001616:beta-Galactosidase