title: Hydroxylated and methoxylated polybrominated diphenyl ethers in mollusks from Chinese coastal areas.
abstract: Hydroxylated polybrominated diphenyl ethers (OH-PBDEs), methoxylated PBDEs (MeO-PBDEs) and PBDEs were determined in three mollusk species collected from three Chinese coastal regions in 2007, 2009, 2010 and 2011. The dominant MeO- and OH-PBDEs isomers detected in mollusks were 6-MeO-BDE-47, 2'-MeO-BDE-68, 6-OH-BDE-47 and 2'-OH-BDE-68. Concentrations of ΣMeO-PBDEs ranged from 9.20 to 2090pgg(-1) dry weight (mean: 450pgg(-1) dry weight). Concentrations of ΣOH-PBDEs ranged from 118 to 2540pgg(-1) dry weight (mean: 534pgg(-1) dry weight). Species differences in accumulation were found for the three mollusk species. Spatial distribution showed that OH- and MeO-PBDEs levels were higher in Weihai than in Tianjin. The temporal trends of OH- and MeO-PBDEs in mollusks were studied during period of 2007 to 2011, rising of ΣOH-PBDEs in Rap from Penglai and Ost from Weihai and declining of ΣMeO-PBDEs in Ost in Penglai were observed. Significant correlations were found between OH- and MeO-PBDEs, but neither between PBDEs and OH-PBDEs, nor between PBDEs and MeO-PBDEs, suggesting that OH- and MeO-PBDEs may have a common source or similar accumulation behavior in mollusks. OH- and MeO-PBDEs were likely not to originate from PBDE precursors.
authors.affiliation: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China.
authors.forename: Jianteng
authors.initials: J
authors.lastname: Sun
authors.forename: Jiyan
authors.initials: J
authors.lastname: Liu
authors.forename: Yanwei
authors.initials: Y
authors.lastname: Liu
authors.forename: Guibin
authors.initials: G
authors.lastname: Jiang
mesh_terms: D000818:Animals; D002681:China; D004784:Environmental Monitoring; D055768:Halogenated Diphenyl Ethers / Q000032:analysis* / Q000737:chemistry*; D006900:Hydroxylation; D008974:Mollusca / Q000737:chemistry*; D012306:Risk; D062211:Spatio-Temporal Analysis; D013045:Species Specificity
chemical_list: D055768:Halogenated Diphenyl Ethers