PCBs, PCNs and PBDEs in sediments and mussels from Qingdao coastal sea in the frame of current circulations and influence of sewage sludge
PCBs, PCNs and PBDEs in sediments and mussels from Qingdao coastal sea in the frame of current circulations and influence of sewage sludge
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DOI：
10.1016/j.chemosphere.2006.07.070
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发表时间：
2007-01-01
期刊：
影响因子：
8.8
通讯作者：
Xi, Dan-Li
中科院分区：
文献类型：
--
作者：
Pan, Jing;Yang, Yong-Liang;Xi, Dan-Li
研究了海流循环和污水污泥对青岛近海沉积物和贻贝中多氯联苯（PCBs）、多氯萘（PCNs）和多溴联苯醚（PBDEs）空间分布的影响。沉积物中PCBs、PCNs和PBDEs的总浓度分别为6.5 - 32.9、0.2 - 1.2和0.1 - 5.5纳克/克干重。最高浓度均出现在海波河口附近，受河流输入的污水污泥影响。在胶州湾现有的水流体系下，有机污染物易在湾东侧沉积并被困在湾内。污水污泥是湾内PCBs、PCNs和PBDEs的重要来源，并使PCBs的富集呈指数增长。另一方面，湾外沉积物中PCBs的同类物分布情况可能表明PCBs有大气来源。贻贝中PCBs、PCNs和PBDEs的总浓度分别为61.4 - 88.6、9.0和13.8纳克/克脂质。相对于沉积物，贻贝对PCBs、PCNs和PBDEs有显著富集。贻贝中PCNs的总毒性当量（TEQs）通常低于PCBs。自20世纪50年代以来，PCBs的总通量及其TEQs一直在稳步下降。PCNs和PBDEs的低氯/溴同类物可能由于亲脂性较低，更易受湾内海流循环影响，因而表现出更明显的趋势。（c）2006爱思唯尔有限公司。版权所有。
influence of current circulation and sewage sludge on spatial distributions of polychlorinated biphenyls (PCBs), polychlorinated naphthalenes (PCNs), and polybrominated diphenyl ethers (PBDEs) in sediments and mussels from the Qingdao coastal sea were investigated. Total concentrations of PCBs, PCNs and PBDEs in sediments ranged 6.5-32.9, 0.2-1.2, and 0.1-5.5 ng g(-1) dry wt, respectively. The maximum concentrations were all found near the Haibo River mouth, affected by sewage sludge input from the river. Under the current system in Jiaozhou Bay the organic pollutants were subject to deposit on the east side of the bay and trapped inside the bay. Sewage sludge was an important source of PCBs, PCNs and PBDEs in the bay and exponentially magnified the enrichment of PCBs. On the other hand, the congener profiles of PCBs in sediments outside the bay may signify an atmospheric source of PCBs. Total Concentrations of PCBs, PCNs and PBDEs in mussels were 61.4-88.6, 9.0, and 13.8 ng g(-1) lipid, respectively. Mussels enriched significantly PCBs, PCNs and PBDEs relative to the sediments. The total toxicity equivalent quantities (TEQs) of PCNs in mussels were generally lower than that of PCBs. The fluxes of the total PCBs and their TEQs have been decreased steadily since 1950s. The lower chlorinated/brominated congeners of PCNs and PBDEs may exhibit a greater tendency due to less lipophilic and thus a greater probability of being affected by the current circulation in the bay. (c) 2006 Elsevier Ltd. All rights reserved.