Bioaccumulation of PCDD/Fs and PCBs in free-range hens: Congener fingerprints and biotransfer factors.

Autor: Lambiase S; Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy. Electronic address: sara.lambiase@izsmportici.it., Fiorito F; Dipartimento di Medicina Veterinaria e Produzioni Animali, Università degli Studi di Napoli Federico II, Naples, Italy., Serpe FP; Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy., Trifuoggi M; Dipartimento di Scienze Chimiche, Università degli studi di Napoli Federico II, Naples, Italy., Gallo P; Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy., Esposito M; Dipartimento di Chimica, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2022 Dec; Vol. 309 (Pt 1), pp. 136602. Date of Electronic Publication: 2022 Sep 27.
DOI: 10.1016/j.chemosphere.2022.136602
Abstrakt: The bioaccumulation of lipophilic environmental contaminants in farm animals is an important issue to control and prevent human exposure to toxic pollutants. Free-range hens were used as a model to assess the transfer and the bioaccumulation of PCDD/Fs, DL-PCBs and NDL-PCBs from the soil to eggs in an area in the Campania region particularly affected by pollution, the "Land of Fires". We determined the following ranges of concentrations in eggs: 0.90-5.51 pg WHO-TEQ g -1 fat for PCDD/Fs; 1.63-4.24 pg WHO-TEQ g -1 fat for DL-PCBs; 2.77-9.75 pg WHO-TEQ g -1 fat for the sum of PCDD/Fs and DL-PCBs and 12.53-30.94 ng g -1 fat for NDL-PCBs. Higher contamination levels were observed in the eggs from free-range hens, compared to those of the control group, that is hens raised indoors; this indicates that soil remains a major source of contamination. Livers showed low levels of contamination for both outdoor and indoor reared hens. Biotransfer factors (BTFs) were calculated for each of the 35 PCDD/F and PCB congeners analysed. The BTFs highlighted that the transfer and bioaccumulation depend on chlorination degree and substitution pattern, in particular they increase with increasing chlorination degree up to the hexa-chlorinated congeners and then decrease. An exception to these finding was observed for 2,3,7,8 TCDD and 2,3,7,8 TCDF, which showed very high BTFs. These results demonstrate the importance of promoting studies on the environmental contaminants bioaccumulation as they provide an effective support for the risk assessment and management of exposure to toxic chemicals.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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