Physiologically based toxicokinetic modeling of three waterborne chloroethanes in rainbow trout (Oncorhynchus mykiss)

Journal Article · Sun Sep 15 04:00:00 EDT 1991 · Toxicology and Applied Pharmacology; (United States)

DOI:https://doi.org/10.1016/0041-008X(91)90040-L· OSTI ID:6093635

Nichols, J W; McKim, J M; Lien, G J; Hoffman, A D; Bertelsen, S L ^[1]

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1. United States Environmental Protection Agency, Environmental Research Laboratory-Duluth, MN (United States)

A physiologically based toxicokinetic model for fish was used to simulate the uptake and disposition of three waterborne chloroethanes in rainbow trout (Oncorhynchus mykiss). Trout were exposed to 1,1,2,2-tetrachloroethane, pentachloroethane, and hexachloroethane in fish respirometer-metabolism chambers to assess the kinetics of chemical accumulation in arterial blood and chemical extraction efficiency from inspired water. Chemical residues in tissues were measured at the end of each experiment. Trout exposed to tetrachloroethane were close to steady-state in 48 hr. Fish exposed to pentachloroethane were near steady-state in 264 hr. Extraction efficiency data showed that systemic (extrabranchial) elimination of both chemicals was small. Hexachloroethane continued to accumulate in fish exposed for 600 hr. Parameterized with chemical partitioning data obtained in vitro, the model accurately simulated the uptake of all three chloroethanes in blood and tissues and their extraction from inspired water. These results provide support for the basic model structure and the accuracy of physiological input parameters.

• OSTI ID: 6093635
• Journal Information: Toxicology and Applied Pharmacology; (United States), Journal Name: Toxicology and Applied Pharmacology; (United States) Vol. 110:3; ISSN TXAPA; ISSN 0041-008X
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
BILE
BIOLOGICAL ACCUMULATION
BIOLOGICAL MATERIALS
BODY FLUIDS
CHLORINATED ALIPHATIC HYDROCARBONS
DISTRIBUTION
FISHES
HALOGENATED ALIPHATIC HYDROCARBONS
LIPIDS
MATERIALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION
TISSUE DISTRIBUTION
TROUT
VERTEBRATES
WATER POLLUTION