BIOCONCENTRATION OF ORGANOCHLORINES PESTICIDES BY THE RAINBOW TROUT

摘要

Concentration of five organochlorines pesticides, i.e. lindan, aldrin, heptachlor epoxide , 4,4'-DDT and hexachlorobenzene, by the rainbow trout was studied in a laboratory continuous flow system. Bioconcentration kinetics of the analytes by the rainbow trout was almost linearly increased during a exposure period of 20 d. For the lindan, approach of an asymptote in curve (wet weight basis) could be observed at the end of exposure. The bioconcentration factors (BCFs) of the five pesticides based on whole body were in the range of 1000-7000. The difference of BCFs may be attributed to the octanol-water partition coefficients (Kow), size and steric effects of the chemicals. The results showed that biomonitoring method with rainbow trout can provide more richer information for the assessments of levels and effects of bioavailable hydrophobic pollutants along with chemical analysis.