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首页> 外文期刊>Environmental Science & Technology >Seasonal and Decadal Variations in Lead Sources to Eastern North Atlantic Mussels
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Seasonal and Decadal Variations in Lead Sources to Eastern North Atlantic Mussels

机译：北大西洋贻贝东部铅源的季节性和年代际变化

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摘要

The concentration of Pb and its stable isotope composition were measured in 216 composite samples of 50 blue mussels (Mytilus edulis (M. edulis)) collected quarterly between 1985 and 2005 at three sites along the French Atlantic coast, one in the La Fresnaye Bay and the others in the Loire and Seine River estuaries. Depending on the sites and time periods, Pb concentrations were 5-66 times higher than the natural background value for the North Atlantic. Even for the samples with the lowest Pb concentrations, the isotopic signature of Pb is very differentthan that of the regional natural Pb, suggesting that most of the bioaccumulated Pb is anthropogenic in origin. Stable Pb isotope ratios measured in the mussels differ markedly from that of Pb emitted in Western Europe as a result of leaded gasoline combustion, which was still a dominant source of contaminant Pb to the atmosphere during most of our study period. The isotope composition of Pb in the mussels was instead more typical of that of the Pb released to the environment by wastewater treatment plants, municipal waste incinerators, and industries such as metal refineries and smelters. Continental runoff, rather than atmospheric deposition, is therefore identified as the leading transport pathway of Pb along the French Atlantic coast From the strong seasonal variations in ~(206)Pb/~(208)Pb ratios in the mussels from the Seine Estuary site we also conclude that the resuspension of contaminated sediments, triggered by high river runoff events, is a chief factor affecting the bioaccumulation of Pb in M. edulis. The value of this organism as a biomonitor of coastal contamination is thus further demonstrated.
机译：在1985年至2005年之间的每季度中，从法国大西洋沿岸的三个地点，拉弗雷斯纳湾和卢瓦尔河和塞纳河河口的其他河道。根据地点和时间段的不同，铅的浓度比北大西洋的自然本底值高5-66倍。即使对于最低的Pb浓度样品，Pb的同位素特征也与区域天然Pb的同位素特征非常不同，这表明大多数生物富集的Pb都是起源于人为的。在贻贝中测得的稳定的Pb同位素比与西欧由于铅汽油燃烧而排放的Pb显着不同，在我们的大多数研究期间，铅汽油的燃烧仍然是大气中Pb污染物的主要来源。相反，贻贝中的Pb同位素组成比废水处理厂，市政垃圾焚化炉以及诸如金属精炼厂和冶炼厂等行业释放到环境中的Pb同位素组成更典型。因此，从塞纳河口站点贻贝的〜（206）Pb /〜（208）Pb比率的强烈季节性变化来看，大陆径流而非大气沉积被认为是Pb在法国大西洋沿岸的主要运输途径。还得出结论，由高径流量引起的污染沉积物的重悬是影响食用蓝藻中铅生物积累的主要因素。因此，进一步证明了这种生物作为沿海污染生物监测者的价值。

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  • 来源
    《Environmental Science & Technology》 |2010年第4期|1211-1216|共6页
  • 作者

    RAOUL-MARIE COUTURE; JKAN-FRANCOIS CHIFFOLEAU; DOMINIQUE AUGER; DIDIER CLAISSE; CHARLES GOBEIL; DANIEL COSSA;

  • 作者单位

    Universite du Quebec, INRS-ETE, 490 Rue de la Couronne, Quebec, Canada, G1K 9A9;

    IFREMER, Centre de Nantes, Rue de l'Ile d'Yeu, Nantes, France, 44311;

    IFREMER, Centre de Nantes, Rue de l'Ile d'Yeu, Nantes, France, 44311;

    IFREMER, Centre de Nantes, Rue de l'Ile d'Yeu, Nantes, France, 44311;

    Universite du Quebec, INRS-ETE, 490 Rue de la Couronne, Quebec, Canada, G1K 9A9;

    IFREMER, Centre de Mediterranee, Zone Portuaire de Bregaillon, La Seyne-sur-mer, France, 83507;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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