The transfer of environmental contaminants (Brominated and Chlorinated dioxins and biphenyls, PBDEs, HBCDDs, PCNs and PFAS) from recycled materials used for bedding to the eggs and tissues of chickens.

Autor: Fernandes AR; School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK. Electronic address: Alwyn.Fernandes@uea.ac.uk., Lake IR; School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK., Dowding A; Food Standards Agency, Clive House, 70 Petty France, London SW1H 9EX, UK., Rose M; Fera Science Ltd, Sand Hutton, York YO41 1LZ, UK., Jones NR; School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK., Smith F; Fera Science Ltd, Sand Hutton, York YO41 1LZ, UK., Panton S; Fera Science Ltd, Sand Hutton, York YO41 1LZ, UK.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Sep 20; Vol. 892, pp. 164441. Date of Electronic Publication: 2023 May 26.
DOI: 10.1016/j.scitotenv.2023.164441
Abstrakt: Some types of poultry bedding made from recycled materials have been reported to contain environmental contaminants such as polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs, dioxins), polychlorinated biphenyls (PCBs) brominated flame retardants (BFRs) polychlorinated naphthalenes (PCNs), polybrominated dioxins (PBDD/Fs), perfluoroalkyl substances (PFAS), etc. In one of the first studies of its kind, the uptake of these contaminants by chicken muscle tissue, liver, and eggs from three types of recycled, commercially available bedding material was simultaneously investigated using conventional husbandry to raise day old chickens to maturity. A weight of evidence analysis showed that PCBs, polybrominated diphenylethers (PBDEs), PCDD/Fs, PCNs and PFAS displayed the highest potential for uptake which varied depending on the type of bedding material used. During the first three to four months of laying, an increasing trend was observed in the concentrations of ΣTEQ (summed toxic equivalence of PCDD/Fs, PCBs, PBDD/Fs, PCNs and polybrominated biphenyls), NDL-PCBs and PBDEs in the eggs of chickens raised on shredded cardboard. Further analysis using bio-transfer factors (BTFs) when egg production reached a steady state, revealed that some PCB congeners (PCBs 28, 81, 138, 153 and 180) irrespective of molecular configuration or chlorine number, showed the highest tendency for uptake. Conversely, BTFs for PBDEs showed good correlation with bromine number, increasing to a maximum value for BDE-209. This relationship was reversed for PCDFs (and to some extent for PCDDs) with tetra- and penta- chlorinated congeners showing a greater tendency for selective uptake. The overall patterns were consistent, although some variability in BTF values was observed between tested materials which may relate to differences in bioavailability. The results indicate a potentially overlooked source of food chain contamination as other livestock products (cow's milk, lamb, beef, duck, etc.) could be similarly impacted.
Competing Interests: Declaration of competing interest The authors assert that they have no conflict of interest (financial or non-financial) in the subject matter discussed in this manuscript.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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