A simplified approach for monitoring hydrophobic organic contaminants associated with suspended sediment: Methodology and applications

Archives of Environmental Contamination and Toxicology
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Abstract

Hydrophobic organic contaminants, although frequently detected in bed sediment and in aquatic biota, are rarely detected in whole-water samples, complicating determination of their occurrence, load, and source. A better approach for the investigation of hydrophobic organic contaminants is the direct analysis of sediment in suspension, but procedures for doing so are expensive and cumbersome. We describe a simple, inexpensive methodology for the dewatering of sediment and present the results of two case studies. Isolation of a sufficient mass of sediment for analyses of organochlorine compounds and PAHs is obtained by in-line filtration of large volumes of water. The sediment is removed from the filters and analyzed directly by standard laboratory methods. In the first case study, suspended-sediment sampling was used to determine occurrence, loads, and yields of contaminants in urban runoff affecting biota in Town Lake, Austin, TX. The second case study used suspended-sediment sampling to locate a point source of PCBs in the Donna Canal in south Texas, where fish are contaminated with PCBs. The case studies demonstrate that suspended-sediment sampling can be an effective tool for determining the occurrence, load, and source of hydrophobic organic contaminants in transport.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title A simplified approach for monitoring hydrophobic organic contaminants associated with suspended sediment: Methodology and applications
Series title Archives of Environmental Contamination and Toxicology
DOI 10.1007/s00244-002-2032-3
Volume 44
Issue 3
Year Published 2003
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Archives of Environmental Contamination and Toxicology
First page 288
Last page 297