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首页> 外文期刊>Environmental Science & Technology >DGT-Induced Copper Flux Predicts Bioaccumulation and Toxicity to Bivalves in Sediments with Varying Properties
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DGT-Induced Copper Flux Predicts Bioaccumulation and Toxicity to Bivalves in Sediments with Varying Properties

机译：DGT诱导的铜通量预测具有不同性质的沉积物中双壳类动物的生物蓄积和毒性

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摘要

Many regulatory frameworks for sediment quality assessment include consideration of contaminant bioavailability. However, the "snap-shots" of metal bio availability provided by analyses of porewaters or acid-volatile sulfide-simultaneously extractable metal (AVS-SEM) relationships do not always contribute sufficient information. The use of inappropriate or inadequate information for assessing metal bioavailability in sediments may result in incorrect assessment decisions. The technique of diffusive gradients in thin films (DGT) enables the in situ measurement of metal concentrations in waters and fluxes from sediment porewaters. We utilized the DGT technique to interpret the bioavailability of copper to the benthic bivalve Tellina deltoidalis in sediments of varying properties contaminated with copper-based antifouling paint particles. For a concentration series of copper-paint contaminated sandy, silty-sand, and silty sediment types, DGT-probes were used to measure copper fluxes to the overlying water, at the sediment-water interface, and in deeper sediments. The overlying water copper concentrations and DGT-Cu fluxes were shown to provide excellent exposure concentration-response relationships in relation to lethal effects occurring to the copper-sensitive benthic bivalve, T. deltoidalis. The study demonstrates the strength of the DGT technique, which we expect will become frequently used for assessing metal bioavailability in sediments.
机译：沉积物质量评估的许多法规框架都考虑了污染物的生物利用度。但是，通过对孔隙水或酸挥发性硫化物-同时可萃取金属（AVS-SEM）关系的分析提供的金属生物利用度的“快照”并不总是提供足够的信息。使用不适当或不足的信息来评估沉积物中金属生物利用度可能会导致错误的评估决策。薄膜中的扩散梯度技术（DGT）能够现场测量水中金属的浓度和沉积物孔隙水的通量。我们利用DGT技术来解释铜对底栖双壳类Tellina deltoidalis的生物利用度，该沉积物具有受铜基防污涂料颗粒污染的各种性质的沉积物中。对于一系列浓度受铜漆污染的沙质，粉质砂和粉质沉积物类型，DGT探针用于测量铜矿通向上覆水，沉积物-水界面以及更深沉积物中的铜通量。上面的水铜浓度和DGT-Cu通量显示出与铜敏感底栖双壳类三角藻T. deltoidalis的致死作用相关的优异暴露浓度-响应关系。这项研究证明了DGT技术的优势，我们预计它将被广泛用于评估沉积物中金属的生物利用度。

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  • 来源
    《Environmental Science & Technology》 |2012年第16期|p.9038-9046|共9页
  • 作者

    Stuart L. Simpson; Heloiese Yverneau; Anne Cremazy; Chad V. Jarolimek; Helen L. Price; Dianne F. Jolley;

  • 作者单位

    Centre for Environmental Contaminants Research, CSIRO Land and Water, Locked Bag 2007, Kirrawee, NSW 2234, Australia;

    Centre for Environmental Contaminants Research, CSIRO Land and Water, Locked Bag 2007, Kirrawee, NSW 2234, Australia,Ecole Nationale Superieure de Chimie de Montpellier-National Graduate School of Chemistry of Montpellier, Montpellier 34296, France;

    Universite de Bordeaux 1, 33600 Pessac, France;

    Centre for Environmental Contaminants Research, CSIRO Land and Water, Locked Bag 2007, Kirrawee, NSW 2234, Australia;

    School of Chemistry, University of Wollongong, NSW 2522, Australia;

    School of Chemistry, University of Wollongong, NSW 2522, Australia;

  • 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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