Abstract
Uptake rates of total14C in fathead minnows (Pimephales promelas) exposed to sublethal concentrations of radiolabeled test compounds followed the order: phenol > 2,4,5-trichlorophenol >p-nitrophenol. Mean whole body14C concentration factors were 15,800, 1,850, and 180 for phenol, 2,4,5-trichlorophenol, andp-nitrophenol exposures, respectively. Only minor amounts of tissue14C was parent compound after 28 days of exposure in fish exposed to phenol andp-nitrophenol, while 78.6% of the14C was parent compound in 2,4,5-trichlorophenol exposed fish. Tissue14C in fish exposed to 2,4,5-trichlorophenol was eliminated at a faster rate than in fish exposed to phenol orp-nitrophenol. Observed mean14C depuration half-lives for lower and higher exposures combined were 387, 150, and 12 hours for phenol,p-nitrophenol, and 2,4,5-trichlorophenol, respectively. Parent compound comprised 1.5, 2.7, and 0.7% of total14C for phenol, 2,4,5-trichlorophenol, andp-nitrophenol, respectively, after 28 days of depuration.
The percentage of acetone-unextractable14C increased from the end of uptake to the end of depuration for phenol and 2,4,5-trichlorophenol, and decreased slightly forp-nitrophenol.14C contribution from polar metabolites increased relative to total14C during the depuration phase for 2,4,5-trichlorophenol andp-nitrophenol.
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Call, D.J., Brooke, L.T. & Lu, P.Y. Uptake, elimination, and metabolism of three phenols by fathead minnows. Arch. Environ. Contam. Toxicol. 9, 699–714 (1980). https://doi.org/10.1007/BF01055545
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DOI: https://doi.org/10.1007/BF01055545