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Development of Methods for Assessing Contaminated Sediments: TIE

Overview  Contaminated sediments generally contain complex mixtures of  chemicals. While sediment toxicity tests can indicate if the  sediment is toxic overall, effective management of contaminated  sediments requires an understanding of the specific chemical(s)  responsible for sediment toxicity. The purpose of this research  project is to develop Toxicity Identification Evaluation (TIE)  methods for contaminated sediments. Previous work has adapted water  column TIE techniques for application to interstitial water.  However, technical and logistical differences between interstitial  water toxicity tests and whole sediment exposures make it desirable  to have TIE methods applicable directly to bulk sediment. Methods  are being developed to characterize, isolate, and identify three  types of common sediment toxicants: metals, ammonia, and non-ionic  organic chemicals. Results of this research will aid all programs  involved with the assessment and management of contaminated  sediments.  Key Products  Leonard EN, Mount DR, and Ankley GT. 1999. Modification of metal  partitioning by addition of synthetic AVS to freshwater sediments.  Environ Toxicol Chem 18:858-864.  Heinis, LJ, Highland TL, and Mount DR. 2  4. A method for testing  the aquatic toxicity of sediment extracts for use in identifying  organic toxicants in sediments. Environ. Sci. Technol. 38:6256-6262.  

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field Investigation
Processes
Natural Ecological Processes
Annex Numbers
Contaminated Sediment
Dredging
Research & Development
Annex 17
Relationship of contaminated sediments on ecosystem health

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Great Lakes - St. Lawrence Region.