Temporal trends of brominated flame retardants in coastal waters of Japan and South China: retrospective monitoring study using archived samples from es-Bank, Ehime University, Japan.
Temporal trends of brominated flame retardants in coastal waters of Japan and South China: retrospective monitoring study using archived samples from es-Bank, Ehime University, Japan.
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DOI：
10.1016/j.marpolbul.2007.12.017
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发表时间：
2008
影响因子：
5.8
通讯作者：
S. Tanabe
中科院分区：
文献类型：
--
作者：
S. Tanabe
本文是爱媛大学海洋环境研究中心对日本和中国南方沿海沃茨中溴化阻燃剂（BFR）的时间趋势进行的研究的总结。已存档的海洋哺乳动物脂肪组织和过时的沉积物岩心被用来评估与该区域使用情况有关的多溴二苯醚和六溴环十二烷的时间趋势。结果表明，在过去的几十年中，这些溴化阻燃剂在日本和中国南方的环境浓度显着增加。污染物浓度的时间趋势与相应溴化阻燃剂的历史消费量一致。日本海洋哺乳动物和沉积物中的多溴联苯醚水平在20世纪90年代达到峰值浓度后，近年来似乎趋于平稳，这与日本从20世纪90年代开始停止使用四溴二苯醚和八溴二苯醚是一致的。随着浓度水平的变化，多溴二苯醚同系物的分布也发生了变化，即溴化程度较高的溴化二苯醚的比例有所增加。此外，近年来日本海洋哺乳动物体内的六溴环十二烷浓度似乎超过了多溴二苯醚，这大概反映了六溴环十二烷的使用量超过了多溴二苯醚。在中国南海的江豚中，过去和最近几年的多溴二苯醚水平都远高于六溴环十二烷浓度，这意味着中国的六溴环十二烷消费量没有多溴二苯醚高。在东京湾的陈旧沉积物岩心中，BDE-209、多溴二苯醚和六溴环十二烷的浓度呈指数增长，分别为4.6-7.9年、6.1-12年和7.1-12年的倍增时间。
The present paper is a summary of studies conducted at the Center for Marine Environmental Studies, Ehime University, on temporal trends of brominated flame retardants (BFRs) in coastal waters of Japan and South China. Archived marine mammal fat tissues and dated sediment cores were used to evaluate temporal trends of polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecanes (HBCDs) in relation to their usage in the region. The results indicate that environmental concentrations of these BFRs in Japan and South China increased significantly during the last several decades. Temporal trends in the contaminant concentrations were consistent with historical consumption of the corresponding BFRs. PBDE levels in marine mammals and sediments from Japan, after showing peak concentrations in the 1990s, appear to be leveling off in recent years, in accordance with the discontinued usage of Tetra- and Octa-BDEs in Japan from the 1990s. The change in concentration levels was also accompanied by changes in PBDE congener profiles, i.e. shift towards increased proportion of higher brominated BDEs. Furthermore, in recent years HBCD concentrations in marine mammals from Japan appear to exceed those of PBDEs, presumably reflecting increasing usage of HBCDs over PBDEs. In finless porpoises from the South China Sea, PBDE levels were much higher than HBCD concentrations both in the past and recent years, implying consumption of HBCDs was not as high as that of PBDEs in China. In dated sediment cores from Tokyo Bay, concentrations increased exponentially with doubling times of 4.6–7.9 years, 6.1–12 years and 7.1–12 years for BDE-209, ΣPBDEs and HBCDs, respectively.