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Title: Assessing the potential toxicity of resuspended sediment

Abstract

Two moderately contaminated freshwater sediments (Sorel Harbour, St. Lawrence River, Canada) were subjected to a suspension event. The objective was to assess the environmental impact of the disposal of dredged material in water, in particular, the short-term effects of dumping on the water column and the long-term effects of dredged sediment deposits. In a series of microcosms, the sediments were left to stand for 25 d under flow-through conditions. In a second series of microcosms, sediments were vigorously suspended for 15 min before being left to settle and were submitted to the same treatment as reference sediments during the following 25 d. Physicochemical and biological parameters (Daphnia magna and Hydra attenuata survival) were measured in overlying water throughout the experiment. Sediment toxicity was assessed with Chironomus tentans and Hyalella azteca exposed to sediments collected at both the beginning and end of the 25-d period. Pore-water toxicity was evaluated with D. magna. During the suspension process, in the Sorel Harbour mixed sediment overlying water, the authors observed effects on H. attenuata survival and ammonia and metals (chromium, copper, and zinc) releases. Meanwhile, in reference (nonmixed) and mixed sediments as well as in associated pore waters, there were no significant chemical modificationsmore » no biological effects after the 25-d experiments. The developed approach, which attempts to simulate a dumping process, aims at allowing the assessment of the short- and long-term hazards resulting from a resuspension process in overlying water and in resettled sediments using both chemical and biological measurements.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lab. d'ecotoxicologie, Lyon (FR)
OSTI Identifier:
20067667
Alternate Identifier(s):
OSTI ID: 20067667
Resource Type:
Journal Article
Journal Name:
Environmental Toxicology and Chemistry
Additional Journal Information:
Journal Volume: 19; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0730-7268
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRONMENTAL POLLUTANT EFFECTS ON LIVING ORGANISMS AND BIOLOGICAL MATERIALS; WATER POLLUTION; SEDIMENTS; BIOASSAY; BIOLOGICAL INDICATORS; MICROCOSMS; CHROMIUM; COPPER; ZINC; AMMONIA

Citation Formats

Bonnet, C., Babut, M., Ferard, J.F., Martel, L., and Garric, J. Assessing the potential toxicity of resuspended sediment. United States: N. p., 2000. Web. doi:10.1897/1551-5028(2000)019<1290:ATPTOR>2.3.CO;2.
Bonnet, C., Babut, M., Ferard, J.F., Martel, L., & Garric, J. Assessing the potential toxicity of resuspended sediment. United States. doi:10.1897/1551-5028(2000)019<1290:ATPTOR>2.3.CO;2.
Bonnet, C., Babut, M., Ferard, J.F., Martel, L., and Garric, J. Mon . "Assessing the potential toxicity of resuspended sediment". United States. doi:10.1897/1551-5028(2000)019<1290:ATPTOR>2.3.CO;2.
@article{osti_20067667,
title = {Assessing the potential toxicity of resuspended sediment},
author = {Bonnet, C. and Babut, M. and Ferard, J.F. and Martel, L. and Garric, J.},
abstractNote = {Two moderately contaminated freshwater sediments (Sorel Harbour, St. Lawrence River, Canada) were subjected to a suspension event. The objective was to assess the environmental impact of the disposal of dredged material in water, in particular, the short-term effects of dumping on the water column and the long-term effects of dredged sediment deposits. In a series of microcosms, the sediments were left to stand for 25 d under flow-through conditions. In a second series of microcosms, sediments were vigorously suspended for 15 min before being left to settle and were submitted to the same treatment as reference sediments during the following 25 d. Physicochemical and biological parameters (Daphnia magna and Hydra attenuata survival) were measured in overlying water throughout the experiment. Sediment toxicity was assessed with Chironomus tentans and Hyalella azteca exposed to sediments collected at both the beginning and end of the 25-d period. Pore-water toxicity was evaluated with D. magna. During the suspension process, in the Sorel Harbour mixed sediment overlying water, the authors observed effects on H. attenuata survival and ammonia and metals (chromium, copper, and zinc) releases. Meanwhile, in reference (nonmixed) and mixed sediments as well as in associated pore waters, there were no significant chemical modifications no biological effects after the 25-d experiments. The developed approach, which attempts to simulate a dumping process, aims at allowing the assessment of the short- and long-term hazards resulting from a resuspension process in overlying water and in resettled sediments using both chemical and biological measurements.},
doi = {10.1897/1551-5028(2000)019<1290:ATPTOR>2.3.CO;2},
journal = {Environmental Toxicology and Chemistry},
issn = {0730-7268},
number = 5,
volume = 19,
place = {United States},
year = {2000},
month = {5}
}