QSAR FOR ORGANIC-CHEMICAL BIOCONCENTRATION IN DAPHNIA, ALGAE, AND MUSSELS

Prediction of the bioconcentration of organic chemicals from water by aquatic organisms has important applications in the management of hazardous chemicals. This study gives a compilation of bioconcentration factors on a wet weight basis (BCF(w)) of 52 organic chemicals by Daphnia magna from aqueous solution. The bioconcentration factors for the chemicals in Daphnia were successfully correlated with their n-octanol/water partition coefficients (log K(ow)) using a linear regression analysis. In addition to the ordinary least-square regression technique, the geometric mean regression technique is also used because this takes into account deviations in K(ow) values. Both results show that the K(ow) value of a chemical is a good predictor of the BCF in Daphnia. The BCF-K(ow) relationships between Daphnia, algae (Chlorella), and mussels (Mytilus edulis) are compared with each other.