Species-specific bioaccumulation of polybrominated diphenyl ethers, hexabromocyclododecan and dechlorane plus in biota: A review

Abstract

Polybrominated diphenyl ethers (PBDEs), hexabromocyclododecans (HBCDs) and dechlorane plus (DPs) are ubiquitous contaminants that are found in numerous matrices around world. They have been proven to be environmentally persistent, bioaccumulative, and toxic to biota, and subject to long-range transport. Technical PBDE mixtures consist of congeners with different bromine content. HBCDs were consisting of three diasteroisomers (-, and -HBCD) and these three isomers are chiral and occur as racemates in technical mixtures. Commercially available DP is a mixture of two stereo isomers: syn-DP and anti-DP. Inter-and intra-species differences on bioaccumulation of PBDEs, HBCDs, and DPs were observed in wildlife which could be attributed to species-specific differences in habitat, diet, contaminant metabolism, absorption and execution as well as different physical and chemical properties among different chemicals. The congener-specific accumulation for PBDEs, the diadtereoisomer and enantiomer-specific accumulation for HBCDs, and the isomer-specific accumulation for DPs in biota indicated the bioaccumulation of these three types of contaminants in biota are very complex processes. This review summarizes the species-specific bioaccumulation of PBDEs, HBCDs, and DPs in biota and analyzes the potential causes for this observation. The currently existing problems and needs for further research are also discussed.

Sources, gastrointestinal absorption and stereo-selective and tissue-specific accumulation of Dechlorane Plus (DP) in chicken

“…This could be a reason for low f anti values found in waterbirds. On the contrary, no study has reported a clear isomer-selective bioaccumulation of syn-DP in terrestrial birds (Luo et al, 2013). Since few studies simultaneously reported the isomer composition of DP in terrestrial birds and their diet sources, it is hard to drawn a conclusion on isomer-selective bioaccumulation of DP in terrestrial birds.…”

Sources and environmental behaviors of Dechlorane Plus and related compounds — A review

“…These studies provide further concerns on the potential threat of DP to human health and ecosystems. A few reviews (Feo et al, 2012;Luo et al, 2013;Sverko et al, 2011a;Vorkamp and Rigét, 2014;Xian et al, 2011) have presented the properties, analytical methods and environmental levels of DP and related compounds in the past several years. This review is aimed at summarizing our current understanding of DP in the environment, including analytical methods, emission sources, and the environmental behaviors.…”