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BIOACCUMULATION IN FUNCTIONALLY DIFFERENT SPECIES: ONGOING INPUT OF PCBS WITH SEDIMENT DEPOSITION TO ACTIVATED CARBON REMEDIATED BED SEDIMENTS
Gidley, P.T., A.J. Kennedy, G.R. Lotufo, A.H. Wooley, N.L. Melby, U. Ghosh, et al.
Environmental Toxicology and Chemistry 38(10):2326-2336

Mesocosm experiments were conducted for 90 days to evaluate the effect of activated carbon (AC) addition on PCB bioaccumulation in sandworms (Alitta virens), hard clams (Mercenaria mercenaria), and sheepshead minnows (Cyprinodon variegatus) in native, field-aged PCB-contaminated bed sediments. PCB-contaminated and clean sediment inputs were added three times per week to the water column. An AC dose equal to the native organic carbon content was mixed into sediment one month before testing. Worms that remained in and directly ingested the sediment had the highest bioaccumulation of native PCBs and fish exposed to the water column had the highest bioaccumulation of input PCBs. Though activated carbon amendment effectively remediated native PCBs despite inputs, it had minimal effect on the input-associated PCBs.



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