DETERMINATION OF BIOCONCENTRATION FACTORS OF 8 TETRACHLOROBENZYLTOLUENES IN THE ZEBRA MUSSEL DREISSENA-POLYMORPHA

Accurate duplicate bioconcentration factors were determined for tetrac hlorobenzyltoluenes (TCBTs). This is the first study that quantifies b ioconcentration factors for single TCBT isomers, A continuous flow upt ake experiment was performed during 21 days with the zebra mussel (Dre issena polymorpha) as a test organism, Bioconcentration factors (BCFs) and rate constants were derived by an iterative integration method. W ith this method BCFs and rate constants can be derived from experiment al data of a bioconcentration test, even if the concentration in the w ater is not constant and steady state has not been reached. Mean log B CF values of TCBTs ranged from 4.43 +/- 0.05 to 5.19 +/- 0.15 liter . kg(-1) on a wet weight basis, The experimental log BCF values were com pared with log BCF values of TCBTs, calculated according to linear and polynomial relationships between log BCF and log K-ow. (C) 1996 Acade mic Press, Inc.