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Occurrences and Fates of Hydroxylated Polybrominated Diphenyl Ethers in Marine Sediments in Relation to Trophodynamics

机译:海洋沉积物中羟基化多溴联苯醚的发生和结局与对流动力学的关系

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摘要

While occurrences and origins of hydroxylated (OH-) polybrominated diphenyl ethers (PBDEs) in organisms have been reported, the fates of these compounds in abiotic matrixes and related trophodynamics are unclear. The present study measured concentrations of nine OH-PBDEs, twelve methoxylated (MeO-) PBDEs, and eleven PBDEs in marine sediments and explored the trophodynamics of OH-PBDEs in five invertebrates, eight fish, and two species of birds from Liaodong Bay, north China. While concentrations of PBDEs were less than the limit of quantification in sediments, concentrations of ΣOH-PBDEs and ΣMeO-PBDEs were 3.2-116 pg/g dry weight (dw) and 3.8-56 pg/g dw, respectively. When the detected compounds were incubated in native marine sediments the interconversion between 6-OH-BDE47 and 6-MeO-BDE47 was observed. This result is consistent with the similar spatial distributions and significant correlation between the concentrations of these naturally occurring compounds. 6-OH-BDE47 and 2'-OH-BDE68 were detected as the two major congeners in organisms collected from Liaodong Bay, and concentrations were 0.24 ± 0.005 ng/g lw (lipid weight) and 0.088 ± 0.006 ng/g lw, respectively. Biota-sediment accumulation factors (BSAFs) for invertebrates of 6-OH-BDE47 and 2-OH-BDE68 were 0.017-0.96 and 0.19-1.5 (except for short-necked clam: 6.3), respectively. Lipid-normalized concentrations of 6-OH-BDE47 and 2'-OH-BDE68 decreased significantly with trophic level with TMFs of 0.21 and 0.15, respectively. The fetes of OH-PBDEs in sediment together with their trophodynamics in marine food webs suggested that OH-PBDEs are partitioned into sediment and undergo biodilution in the marine food web.
机译:虽然已经报道了生物体中羟基化(OH-)多溴联苯醚(PBDEs)的发生和来源,但这些化合物在非生物基质中的命运以及相关的营养动力学尚不清楚。本研究测量了海洋沉积物中9种OH-PBDEs,12种甲氧基化(MeO-)PBDEs和11种PBDEs的浓度,并探讨了北部辽东湾的5种无脊椎动物,8种鱼类和2种鸟类中OH-PBDEs的营养动力学。中国。尽管多溴二苯醚的浓度低于沉积物中的定量极限,但ΣOH-PBDEs和ΣMeO-PBDEs的浓度分别为干重(dw)3.2-116 pg / g和dw 3.8-56 pg / g。当将检测到的化合物在天然海洋沉积物中孵育时,观察到6-OH-BDE47和6-MeO-BDE47之间的相互转化。该结果与相似的空间分布以及这些天然化合物的浓度之间的显着相关性是一致的。检测到6-OH-BDE47和2'-OH-BDE68是从辽东湾收集的生物中的两个主要同源物,其浓度分别为0.24±0.005 ng / g lw(脂质重量)和0.088±0.006 ng / g lw。 。 6-OH-BDE47和2-OH-BDE68无脊椎动物的生物沉积物累积因子(BSAF)分别为0.017-0.96和0.19-1.5(短颈蛤除外:6.3)。脂质归一化浓度的6-OH-BDE47和2'-OH-BDE68随营养水平显着降低,TMF分别为0.21和0.15。沉积物中OH-PBDEs的功能及其在海洋食物网中的营养动力学表明,OH-PBDEs被划分为沉积物并在海洋食物网中进行了生物稀释。

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  • 来源
    《Environmental Science & Technology》 |2012年第4期|p.2148-2155|共8页
  • 作者单位

    Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;

    Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;

    Toxicology Centre and School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchwan S7N 5B3,Canada;

    Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan S7J 5B3, Canada;

    Department of Veterinary Biomedical Sciences and Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan S7J 5B3, Canada,Zoology Department, Center for Integrative Toxicology, Michigan State University, East Lansing, Michigan 48824, United States,Department of Biology and Chemistry, and State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon,Hong Kong SAR, China;

    Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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