Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
Environ Sci Technol. 2012 Feb 21;46(4):2148-55. doi: 10.1021/es203195s. Epub 2012 Feb 7.
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 fates 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.
虽然已经报道了生物体中羟基化（OH-）多溴二苯醚（PBDE）的发生和来源，但这些化合物在非生物基质中的命运及其相关的营养动态仍不清楚。本研究测量了辽东湾海洋沉积物中 9 种 OH-PBDEs、12 种甲氧基（MeO-）PBDEs 和 11 种 PBDEs 的浓度，并探讨了 5 种无脊椎动物、8 种鱼类和 2 种鸟类中 OH-PBDEs 的营养动态。虽然沉积物中 PBDEs 的浓度低于定量限，但ΣOH-PBDEs 和 ΣMeO-PBDEs 的浓度分别为 3.2-116 pg/g 干重（dw）和 3.8-56 pg/g dw。当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。这一结果与这些天然存在的化合物在空间分布上的相似性和浓度之间的显著相关性一致。辽东湾采集的生物体内检测到 6-OH-BDE47 和 2'-OH-BDE68 这两种主要同系物，浓度分别为 0.24±0.005ng/g lw（脂重）和 0.088±0.006ng/g lw。6-OH-BDE47 和 2'-OH-BDE68 的生物-沉积物积累因子（BSAFs）分别为 0.017-0.96 和 0.19-1.5（短颈蛤除外：6.3）。6-OH-BDE47 和 2'-OH-BDE68 的脂重归一化浓度随营养级显著降低，TMFs 分别为 0.21 和 0.15。OH-PBDEs 在沉积物中的命运及其在海洋食物网中的营养动态表明，OH-PBDEs 分配到沉积物中，并在海洋食物网中发生生物稀释。
