Selective removal of organic contaminants from sediments: a methodology for toxicity identification evaluations (TIEs).
Aqueous slurries of a test sediment spiked with dibenz[a,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.
Lebo
J A
JA
US Geological Survey, Columbia Environmental Research Center, MO, USA. jon_lebo@usgs.gov
Huckins
J N
JN
Petty
J D
JD
Ho
K T
KT
Stern
E A
EA
D000042:Absorption; D004787:Environmental Pollution / Q000517:prevention & control*; D019015:Geologic Sediments / Q000737:chemistry*; D008567:Membranes, Artificial; D009930:Organic Chemicals / Q000032:analysis* / Q000493:pharmacokinetics; D012989:Soil Pollutants / Q000493:pharmacokinetics*; D013696:Temperature
D008567:Membranes, Artificial; D009930:Organic Chemicals; D012989:Soil Pollutants