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|Title:||Assessment of DDT bioavailability in the Little Sunflower River sediment and agricultural soil|
Applied Research Associates.
Analytical Services, Inc.
University of Notre Dame. Department of Civil Engineering.
Geotechnical and Structures Laboratory (U.S.)
United States. Army. Corps of Engineers. Vicksburg District.
Lotufo, Guilherme R.
Steevens, Jeffery A.
Houston, Jerre G.
Fredrickson, Herbert L.
Perkins, Edward J.
Morrow, Agnes B.
Weiss, Charles A.
Furey, John S.
Felt, Deborah R.
Talley, Jeffery W.
Little Sunflower River
|Publisher:||Environmental Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||ERDC TR ; 02-6.|
Abstract: Dredged materials from the Little Sunflower River and soils from its adjacent agricultural fields were collected and homogenized to provide sufficient samples for DDT, DDE, and DDD analyses. Room temperature aqueous desorption studies (using Tenax beads) were performed to assess the release of DDT, DDE, and DDD from the sediment. Microbial ecology testing applied PLFA and DNA procedures to evaluate the potential for enhanced biotreatment or biotic natural attenuation. Toxicity testing studied the survivability of Hyalella azteca exposed for 10 days to DDT-, DDE-, and DDD-impacted dredged material. A 28-day bioaccumulation test was also performed using Lumbriculus variegates as the test organism. Overall, the results were used to synthesize and correlate data to assess the availability and toxicity of DDT, DDE, and DDD in dredged sediments. The combined investigative approaches used in these studies indicate the present level of DDT, DDE, and DDD may not be toxic to benthic invertebrates. However, this work confirmed that DDE and DDD are readily available and bioaccumulate in the biota at measurable levels.
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