Spatial distribution and vertical profile of polybrominated diphenyl ethers and hexabromocyclododecanes in sediment core from Tokyo Bay, Japan.
Spatial distribution and vertical profile of polybrominated diphenyl ethers and hexabromocyclododecanes in sediment core from Tokyo Bay, Japan.
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DOI：
10.1016/j.envpol.2006.12.011
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发表时间：
2007-07
影响因子：
8.9
通讯作者：
N. Minh;T. Isobe;D. Ueno;K. Matsumoto;Masayuki Mine;N. Kajiwara;Shin Takahashi;S. Tanabe
中科院分区：
文献类型：
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作者：
N. Minh;T. Isobe;D. Ueno;K. Matsumoto;Masayuki Mine;N. Kajiwara;Shin Takahashi;S. Tanabe
在日本东京湾的3个沉积物柱样和6个表层沉积物中检测到溴化阻燃剂(BFR)、六溴环十二烷(HBCDs)和多溴二乙醚(PBDEs)。在该区域首次检测到六溴联苯并二恶英的浓度在0.056至2.3 ng/g干重之间，这意味着它们受到了广泛的污染，尽管它们的浓度低于∑多溴二苯醚(二对非二溴二苯醚)和BDE209。这些化合物的水平较高，靠近海湾人口稠密的工业区，这意味着工业和人类活动是这些化合物的来源。20世纪90年代中期以前，∑多溴联苯醚在沉积物中的含量一直在增加，之后逐渐减少，而随着不同商业用途的溴化二苯醚混合物的使用，到目前为止，BDE209一直呈增加的趋势。HBCDs最早出现在20世纪70年代中期，并一直增加到今天。HBCd的年表面通量(0.62-2.4 ng/cm~2/yr)与∑的PBDEs(0.95-2.6 ng/cm~2/yr)相当，但低于BDE209(17-58 ng/cm~2/yr)。
Brominated flame retardants (BFRs), hexabromocyclododecanes (HBCDs) and polybrominated diethyl ethers (PBDEs) were detected in three sediment cores and six surface sediments of Tokyo Bay, Japan. HBCDs were detected for the first time in this region with concentrations ranging from 0.056 to 2.3ng/g dry wt, implying their widespread contamination, even though their concentrations were lower than ∑PBDEs (di- to nona-BDEs) and BDE-209. Levels of these compounds were higher near to the highly populated industrial area of the bay implicating industrial and human activities as sources of these compounds. ∑PBDEs increased in the sediment layer up to the mid-1990s and decreased afterwards, whereas BDE-209 showed an increasing trend until now, following the usage of different commercial BDE mixtures. HBCDs first appeared in the mid-1970s and increased until today. The annual surficial flux of HBCDs (0.62–2.4ng/cm2/yr) is equal to ∑PBDEs (0.95–2.6ng/cm2/yr) but lower than that of BDE-209 (17–58ng/cm2/yr).