抄録
Polychlorinated Dibenzo-p-dioxins and Dibenzofurans (PCDD/Fs) in fish (coastal and freshwater), intestinal contents of freshwater fish and water samples from Matsuyama, Japan were analyzed to evaluate the contamination levels and accumulation patterns. PCDD/Fs were detected in all samples investigated. Impurities of 2,4,6-Trichloropheyl 4-nitrophenylether (CNP) as a herbicide for paddy field and polychlorinated biphenyls (PCBs) were thought as PCDD/Fs sources of fish samples expect for formation under combustion process.
Bioconcentration Factors (BCFs) and Biomagnification Factors (BMFs) of PCDD/Fs in freshwater fish were calculated to evaluate accumulation patterns. BCFs and BMFs were ranged from approximately 10 to 100000 and from 0.001 to 0.1, respectively. These values of high chlorinated congeners, such as OCDD, were lower than low chlorinated congeners, such as TeCDD. There was no correlation between the octanol-water partition coefficient and BCFs and BMFs. It was explained by limited membrane permeability in fish.
