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

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

“…These observations suggest that contaminant biotransfer appears to depend on the molecular characteristics of configuration and the degree of halogenation. This is consistent with the results of other studies investigating PCDD/F uptake (Traag et al, 2006) and biotransfer (Fernandes et al, 2011;Lambiase et al, 2022) in laying chickens, that also report on the greater magnitude of BTFs for the more toxic lower chlorinated PCDD/F homologues. This relationship is not observed for the PCBs which show varying magnitudes of BTFs, suggesting a greater dependence of the uptake on molecular configuration.…”

“…In this study, BTFs for PBDES, PCBs and PCDD/Fs in tissues and eggs were estimated at around three and a half months after egg laying commenced, which represented a reasonable approximation to a steady state phase. As described and used in other studies (Foxall et al, 2004;Fernandes et al, 2011Fernandes et al, , 2019Lambiase et al, 2022) BTFs are estimated using the following equation which relates tissue (or egg) concentrations of a contaminant with the corresponding daily input flux.…”

Sustainable development of environmental protection talents training: Research on the behavior decision of government, university and enterprise under the background of evolutionary game

“…Many industrial chemicals are chemically and physiologically stable and can persist in the environment and biological systems [23]. They are also highly lipophilic, which leads to their bioaccumulation in the fatty tissues of animals and humans [24]. Environmental protection in industrial production processes has therefore received widespread attention around the world.…”

Accumulation Rate, Depuration Kinetics, and Tissue Distribution of Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans (PCDD/Fs) in Suckler Ewes (Ovis aries)

“…Although successful measures have been taken since the 1980s to reduce anthropogenic PCDD/F emissions, environmental PCDD/F contamination (particularly of top-soil organic matter, which acts as a sink for POPs) is still detected sporadically in some areas. − Recent incidents of soil contamination with PCDD/Fs include the “Land of Fires” in the Campania region of Italy due to illegal open burning of hazardous waste and a case in the Lausanne area of Switzerland due to an old municipal waste incinerator, which had a wide social and economic impact. In particular, livestock reared in such areas may be exposed orally to PCDD/Fs through ingestion of contaminated soil, such as herbivores grazing on pastures , or poultry with access to open air runs .…”