Selective removal of organic contaminants from sediments: a methodology for toxicity identification evaluations (TIEs) |
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Authors: | Lebo J A Huckins J N Petty J D Ho K T Stern E A |
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Institution: | US Geological Survey, Columbia Environmental Research Center, MO, USA. jon_lebo@usgs.gov |
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Abstract: | Aqueous slurries of a test sediment spiked with dibenza,h]anthracene, 2,4,5,2',4',5'-hexachlorobiphenyl, p,p'-DDE, or phenanthrene were subjected to decontamination experimentation. The spiked sediments were agitated at elevated temperatures for at least 96 h in the presence of either of the two contaminant-absorbing media: clusters of polyethylene membrane or lipid-containing semipermeable membrane devices (SPMDs). The effects of treatment temperature and surface area of media on the removal of contaminants were explored. This work is part of a larger methodology for whole-sediment toxicity identification evaluation (TIE). A method is being sought that is capable of detoxifying sediments with respect to organic contaminants while leaving toxicity attributable to inorganic contaminants unaffected. |
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