PCDD/F and PCB transfer to milk in goats exposed to a long-term intake of contaminated hay

Adrián Costera (1) , Cyril Feidt (1) , Philippe Marchand (2) , Bruno Le Bizec (2) , Guido Rychen (1)

1 URAFPA - Unité de Recherches Animal et Fonctionnalités des Produits Animaux
2 LABERCA - Laboratoire d'étude des Résidus et Contaminants dans les Aliments

The purpose of this study was to determine the feed to milk transfer of 17 PCDD/Fs and 18 PCBs in goats exposed to a 10-week long-term intake of contaminated hay collected in the vicinity of a hazardous municipal waste incinerator. The sum of PCDD/Fs and PCBs WHO-I-TEQ was found to be higher than 3 ng kg−1 of milk fat after the first experimental week. Carry-over rates (CORs) of PCDD/Fs and PCBs could be established at steady state conditions for each compound studied. For PCDD/Fs, 2,3,7,8-TCDD appeared as the compound having the highest COR (38.8%). Within dioxin-like-PCBs the highest COR were found at a similar level (higher than 80%) for PCBs 105, 118 and 157. Concerning indicator-PCBs, COR ranged from 5% (PCB 101) to more than 40% (PCBs 118, 153 and 180). The intensity of this transfer appeared to be a function of physico-chemical properties (chlorination or log Kow) of the molecules and their metabolic behaviour.

Mots clés: POLYCHLORODIBENZO-P-DIOXINE

Mots clés: TRANSFERT

Domaines: Milieux et Changements globaux

Adrián Costera, Cyril Feidt, Philippe Marchand, Bruno Le Bizec, Guido Rychen. PCDD/F and PCB transfer to milk in goats exposed to a long-term intake of contaminated hay. Chemosphere, 2006, 64 (4), pp.650-657. ⟨10.1016/j.chemosphere.2005.10.052⟩. ⟨hal-02665783⟩