Congener specific distributions of polybrominated diphenyl ethers (PBDEs) in sediment and mussel (Mytilus edulis) of the Bo Sea, China.
Congener specific distributions of polybrominated diphenyl ethers (PBDEs) in sediment and mussel (Mytilus edulis) of the Bo Sea, China.
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DOI：
10.1016/j.chemosphere.2008.10.064
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发表时间：
2009-02
期刊：
影响因子：
8.8
通讯作者：
Zhen Wang;Xindong Ma;Zhongsheng Lin;G. Na;Ziwei Yao
中科院分区：
文献类型：
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作者：
Zhen Wang;Xindong Ma;Zhongsheng Lin;G. Na;Ziwei Yao
研究了多溴联苯醚（PBDEs）在渤海沿岸沉积物和贻贝（Mytilus edulis）中的分布特征。沉积物中BDE-209和多溴二苯醚（包括BDE-17、BDE-28、BDE-47、BDE-66、BDE-71、BDE-85、BDE-99、BDE-100、BDE-138、BDE-153、BDE-154、BDE-183和BDE-190）的中位值分别为2.29和0.16ngg-1干重，贻贝中的中位值分别为2.43和0.68ngg-1干重。BDE-209是主要的同系物（贻贝中为61-99%，沉积物中为75-99%，只有一个样本的含量为17%）。在沉积物和贻贝之间观察到不同的同系物模式（不包括BDE-209），这归因于个别同系物的生物累积潜力和/或代谢能力。沉积物中含量最高的四种同系物分别为BDE-47（40.3%）、BDE-99（22.5%）、BDE-71（8.9%）和BDE-28（5.8%），贻贝中含量最高的同系物分别为BDE-47（36.4%）、BDE-28（14.5%）、BDE-154（8.6%）和BDE-71（8.6%）。沉积物中BDE-47/BDE-99和BDE-100/BDE-99的比值低于贻贝中的比值，表明贻贝中BDE-99的转化和吸收速率较高。除BDE-154外，其他多溴二苯醚同系物的生物-沉积物累积系数（BSAF）均随辛醇-水分配系数对数（logKOW）的增加而降低，表明logKOW较高的同系物更容易保留在沉积物中。这些可以用这些化合物对碳质地质吸附剂的高亲和力和限制大的、非常疏水的有机化合物穿透细胞膜的分子空间位阻来解释。
Congener specific distributions of polybrominated diphenyl ethers (PBDEs) were investigated in sediment and mussel (Mytilus edulis) collected from the coast of Bo Sea, China. The median values of BDE-209 and ΣPBDEs (including BDE-17, -28, -47, -66, -71, -85, -99, -100, -138, -153, -154, -183 and -190) were 2.29 and 0.16ngg−1dry weight in sediment, and 2.43 and 0.68ngg−1dry weight in mussel, respectively. BDE-209 was the predominant congener (61–99% in mussel and 75–99% in sediment except for one sample with 17%). Different congener patterns (excluding BDE-209) were observed between sediment and mussel, which were attributed to individual congener’s bioaccumulation potential and/or the ability to metabolize. The four most abundant congeners were BDE-47 (40.3%), -99 (22.5%), -71 (8.9%) and -28 (5.8%) in sediment, and -47 (36.4%), -28 (14.5%), -154 (8.6%) and -71 (8.6%) in mussel, respectively. The ratios of BDE-47/BDE-99 and BDE-100/BDE-99 in sediment were lower than those in mussel, indicating higher transformation and uptake rate of BDE-99 in mussel. The biota-sediment accumulation factor (BSAF) of individual PBDE congeners declined with the increase of their logarithm of octanol–water partition coefficients (logKOW) except for BDE-154, indicating congeners with higher logKOWwere more likely to retain in sediment. These can be explained with a high affinity of these compounds for carbonaceous geosorbents, and molecular steric hindrance that limits large, very hydrophobic organic compounds from penetrating the cellular membranes.