Uptake and depuration of nonionic organic contaminants from sediment by the oligochaete, Lumbriculus variegatus

Ingersoll, C. G.; Brunson, E. L.; Wang, F. N.; Dwyer, J.; Ankley, G. T.; Mount, D. R.; Huckins, J.; Petty, J.; Landrum, P. F.

Abstract:

Uptake of sediment-associated contaminants by the oligochaete Lumbriculus variegatus was evaluated after 1, 3, 7, 14, 28, and 56 d of exposure to a field-collected sediment contaminated with DDT and its metabolites, dichlorodiphenyldichloroethane (DDD) and dichlorodiphenyldichloroethylene (DDE), or to a field-collected sediment contaminated with polycyclic aromatic hydrocarbons (PAHs). Depuration of contaminants by oligochaetes in a control sediment or in water was also evaluated over a 7-d period after 28 d of exposure to the field-collected sediments. Accumulation of PAHs with a log octanol-water partitioning coefficient (log Kow) <5.6 typically reached a peak at day 3, followed by a lower plateau between days 7 and 56 of the sediment exposure. Similarly, 4,4???-DDT exhibited a peak in accumulation at day 14 followed by a decline at days 28 and 56. In contrast, accumulation of PAHs with a log Kow >5.6 or DDD and DDE typically exhibited a steady increase from day 1 to about day 14 or 28, followed by a plateau. Therefore, exposures conducted for a minimum of 14 to 28 d better reflected steady-state concentrations for DDT and its metabolites and for PAHs. Depuration rates for DDT and its metabolites and high-Kow PAHs were much higher in organisms held in clean sediment relative to both water-only depuration and model predictions. This suggests that depuration in clean sediment may artificially accelerate depuration of hydrophobic compounds. Comparisons between laboratory-exposed L. variegatus and oligochaetes collected in the field from these sediments indicate that results of laboratory tests can be extrapolated to the field with a reasonable degree of certainty.

Genre:

Conference Paper

ProdID:

70025657

Citation Author:

Ingersoll, C. G.; Brunson, E. L.; Wang, F. N.; Dwyer, J.; Ankley, G. T.; Mount, D. R.; Huckins, J.; Petty, J.; Landrum, P. F.

Citation Contributing Office:

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

885

Citation Issue:

Citation Keywords:

Citation Language:

English

Citation Larger Work Title:

Environmental Toxicology and Chemistry

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

Citation Projection:

Citation Public Comments:

Citation Publisher:

Citation Series:

Citation Series Code:

Citation Series Number:

Citation Search Results Text:

Uptake and depuration of nonionic organic contaminants from sediment by the oligochaete, Lumbriculus variegatus; 2003; Conference Paper; Environmental Toxicology and Chemistry; Ingersoll, C. G.; Brunson, E. L.; Wang, F. N.; Dwyer, J.; Ankley, G. T.; Mount, D. R.; Huckins, J.; Petty, J.; Landrum, P. F.