Abstract
The water column concentration and bioaccumulation of the polychlorinated biphenyl (PCB) congener CB052 was modeled in New Bedford Harbor, Massachusetts, using site-specific hydrodynamics and loading information. Equilibrium partitioning theory was used to estimate interstitial water CB052 concentrations from sediment concentrations in New Bedford Harbor and Buzzards Bay, Massachusetts. The rate of CB052 vertical flux from the interstitial water to the overlying water column was calculated by multiplying the vertical concentration gradient at the sedimentwater interface by a flux coefficient. The vertical flux coefficient and the flux rate from model-generated water-column concentrations were calculated using an interative procedure. Movement of CB052 within New Bedford Harbor was simulated using calibrated two-dimensional, vertically-integrated, finite element hydrodynamic and transport models. Quasi-steady-state water column concentrations and a field-derived bioconcentration factor were used to predict the expected concentration of CB052 in blue mussels (Mytilus edulis) at two stations in New Bedford Harbor. The model was used to predict the effects of two remedial scenarios (i.e., reducing average sediment total PCB concentrations to 50 ppm or 10 ppm) on concentrations of CB052 in water and blue mussel tissue. Based on the model results, the CB052 concentration in blue mussels would be reduced by 33–53% for the 50 ppm option and by 67–84% for the 10 ppm option.
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Abdelrhman, M.A., Bergen, B.J. & Nelson, W.G. Modeling of PCB concentrations in water and biota (Mytilus edulis) in New Bedford Harbor, Massachusetts. Estuaries 21, 435–448 (1998). https://doi.org/10.2307/1352842
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DOI: https://doi.org/10.2307/1352842