STP634

    A Model System to Study the Desorption and Biological Availability of PCB in Hydrosoils

    Published: Jan 1977


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    Abstract

    Model aquatic systems incorporating hydrosoil, water, and fish components were used to measure the dynamics of Aroclor 1254 [polychlorinated biphenyl (PCB)] under both flowing and static water conditions.

    PCB desorption from hydrosoils was consistent with adsorption-desorption theory. Under static conditions, hydrosoil PCB concentrations from 10 to 500 µg/g produced equilibrium levels of 0.13 to 7.60 µg/litre PCB in water. In continuous flow tests, equilibrium PCB levels in water ranged from 0.11 to 0.54 µg/litre for hydrosoil concentrations of 100 to 500 µg/g PCB. Equilibrium PCB concentrations in water could be predicted under both static and continuous flow conditions with the distribution coefficient equation. Desorption favored the lower-chlorinated, more water-soluble components of Aroclor 1254.

    Fathead minnows allowed direct contact with PCB-contaminated hydrosoils accumulated PCB residues at six times the rates of those screened from direct exposure to sediments. Fish selectively bioaccumulated the higher chlorinated components of Aroclor 1254.

    Keywords:

    water analysis, toxicology, aromatic polycyclic hydrocarbons, bioassay, biphenyl, desorption, fishes, models, tests, water pollution


    Author Information:

    Halter, MT
    Fisheries research biologist and professor, Michigan State University, East Lansing, Mich.

    Johnson, HE
    Fisheries research biologist and professor, Michigan State University, East Lansing, Mich.


    Paper ID: STP32399S

    Committee/Subcommittee: E35.30

    DOI: 10.1520/STP32399S


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