title: Hexabromocyclododecane in terrestrial passerine birds from e-waste, urban and rural locations in the Pearl River Delta, South China: levels, biomagnification, diastereoisomer- and enantiomer-specific accumulation.
abstract: Diastereoisomers and enantiomers of hexabromocyclododecane (HBCD) were determined in muscle and stomach contents of three terrestrial passerine birds from e-waste, urban and rural locations in South China. The highest HBCD concentration was found at the urban site, followed by the e-waste site, suggesting that HBCD was linked to urbanization and industrialization, as well as e-waste recycling activities. Trophic magnification for α-HBCD was observed in the terrestrial food chain. Diastereisomeric pattern in birds showed the predominance of α-isomer, with a minor contribution of γ-isomer. The enantiomeric analysis revealed a preferential enrichment of (-)-α-HBCD and (+)-γ-HBCD. The similarity in enantiomeric fractions of HBCD isomers between muscle and stomach contents of birds suggested that dietary uptake may be responsible for the observed nonracemic distribution of HBCD isomers in the studied birds although in vivo enantioselective biotic processes cannot be ruled out.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
authors.forename: Yu-Xin
authors.initials: YX
authors.lastname: Sun
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Luo
authors.forename: Ling
authors.initials: L
authors.lastname: Mo
authors.forename: Ming-Jing
authors.initials: MJ
authors.lastname: He
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhang
authors.forename: She-Jun
authors.initials: SJ
authors.lastname: Chen
authors.forename: Fa-Sheng
authors.initials: FS
authors.lastname: Zou
authors.forename: Bi-Xian
authors.initials: BX
authors.lastname: Mai
mesh_terms: D000818:Animals; D002681:China; D059029:Electronic Waste; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000378:metabolism*; D004787:Environmental Pollution / Q000706:statistics & numerical data; D005766:Gastrointestinal Contents / Q000737:chemistry; D006842:Hydrocarbons, Brominated / Q000378:metabolism*; D009132:Muscles / Q000378:metabolism; D046109:Passeriformes / Q000378:metabolism*; D013237:Stereoisomerism
chemical_list: D004785:Environmental Pollutants; D006842:Hydrocarbons, Brominated; C089796:hexabromocyclododecane