Abstract
Accumulation of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) via food to carps was investigated. PCDDs/PCDFs extracted from fly ash of a municipal waste incinerator were given to carps with food for 5 days. After 7 days from stop of dose, their concentrations in the edible parts of the carps were determined, and the following results were obtained.
(1) The 2, 3, 7, 8 substituted isomers accumulated more in carp than those not having TEF values.
(2) The PCDDs/PCDFs with greatar TEF values accumulated more in the carps than those with smaller TEF values, and a logarithmic relationship between the TEF values by WHO for mammalian or fish and relative accumulation ratio RAR was expressed approximately by the next equation.
RAR≈7 (TEF)0.52
However, the TEF values of 1, 2, 3, 6, 7, 8- and 1, 2, 3, 7, 8, 9-hexa (Hx) CDD for fish were thought to be smaller than the expected values from the RAR.
