School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK; National Research Centre for Environmental Toxicology, 39 Kessels Road, Coopers Plains, QLD 4108, Australia.
National Research Centre for Environmental Toxicology, 39 Kessels Road, Coopers Plains, QLD 4108, Australia.
Sci Total Environ. 2015 Apr 15;512-513:177-184. doi: 10.1016/j.scitotenv.2015.01.034. Epub 2015 Jan 22.
This paper presents the first historical data on the occurrence of polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCDs) in estuarine sediment from Australia. Sediment cores and surficial sediment samples were collected from four locations within Sydney estuary, Australia. Large increases in concentrations were observed for all compounds between 1980 and 2014, especially for BDE-209 (representative usage of Deca-BDE commercial mixture), which was found in surficial sediment at an average concentration of 42 ng/g dry wt (21-65 ng/g dry wt). PBDE congeners representative of both the Penta- and Octa-BDE commercial mixtures (∑6PBDEs) were also found in their highest concentrations in surficial sediments (average: 1.3 ng/g dry wt; range: 0.65-2.5 ng/g dry wt). PBDE concentrations in surficial sediments were relatively high when compared with those presented in the available literature. This suggests that their input into the Sydney estuary has not decreased since their bans almost a decade earlier. After a sharp increase in the 1990s, HBCD concentrations peaked at an average of 3.5 ng/g dry wt (1.8-5.3 ng/g dry wt) in surficial samples. With global legislation on HBCDs allowing its usage for the next 10 years, it is expected that its input into the estuary is likely to continue.
本文提供了澳大利亚河口沉积物中多溴二苯醚（PBDEs）和六溴环十二烷（HBCDs）的首次历史数据。从澳大利亚悉尼河口的四个地点采集了沉积物芯和表层沉积物样品。在 1980 年至 2014 年期间，所有化合物的浓度都大幅增加，尤其是 BDE-209（代表性使用商用十溴二苯醚混合物），在表层沉积物中的平均浓度为 42ng/g 干重（21-65ng/g 干重）。还在表层沉积物中发现了五溴和八溴商用混合物的 PBDE 同系物（∑6PBDEs），其浓度也达到了最高水平（平均：1.3ng/g 干重；范围：0.65-2.5ng/g 干重）。与现有文献中报道的浓度相比，表层沉积物中的 PBDE 浓度相对较高。这表明自近十年前禁令实施以来，它们输入悉尼河口的情况并未减少。在 20 世纪 90 年代急剧增加之后，HBCD 浓度在表层样本中平均达到 3.5ng/g 干重（1.8-5.3ng/g 干重）的峰值。随着全球对 HBCDs 的立法允许其在未来 10 年内使用，预计其输入河口的情况可能会继续。
