Abstract

In this report assessment of the bioavailability of dioxins and furans from fly ash in two cows is described. The fly ash was purchased from a company operating a solid waste incinerator. The results of this study indicate that the bioavailability of the toxicologically important congeners is 0.74 +/- 0.35% of the dose. As an indicator of the bioavailability of dioxins in cows under field conditions this number must be considered as a lower limit. Only part of the dioxins ingested by cows is fly ash bound and this latter material is presumably more tenacious with respect to dioxins than others.