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首页> 外文期刊>Environmental toxicology and chemistry >THE INFLUENCE OF SEDIMENT PARTICLE SIZE AND ORGANIC CARBON ON TOXICITY OF COPPER TO BENTHIC INVERTEBRATES IN OXIC/SUBOXIC SURFACE SEDIMENTS
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THE INFLUENCE OF SEDIMENT PARTICLE SIZE AND ORGANIC CARBON ON TOXICITY OF COPPER TO BENTHIC INVERTEBRATES IN OXIC/SUBOXIC SURFACE SEDIMENTS

机译：沉积物粒径和有机碳对铜对氧/硫表面沉积物中底栖无脊椎动物的毒性的影响

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摘要

The use of sediment quality guidelines to predict the toxicity of metals in sediments is limited by an inadequate understanding of exposure pathways and by poor causal links between exposure and effects. For a 10-d exposure to Cu-spiked sediments, toxicity to the amphipod Melita plumulosa was demonstrated to occur through a combination of dissolved and dietary Cu exposure pathways, but for the bivalves Spisula trigonella and Tellina deltoidalis, toxicity occurred primarily by exposure to dissolved Cu. For relatively oxidized sediments that had moderate amounts of organic carbon (2.6-8.3% OC), silt (20-100% <63-μm particles) but low acid-volatile sulfide (AVS), acute toxicity thresholds for the three species were derived based on the OC-normalized Cu concentration of the less than 63-μm sediment fraction. For all three species, no effects were observed at concentrations below 10 μg/L dissolved Cu (in pore water and overlying water) or below 12 mg Cu/g OC (for <63 μm sediment). For sediments with silt/OC properties of 20/0.5, 50/1, or 70/4%, the paniculate Cu-based threshold equated to 60, 120, or 480 mg Cu/kg, respectively. For oxic/suboxic sediments in which AVS is not limiting metal availability, sediment quality guidelines of this form will provide adequate protection against toxicity and improve the prediction of effects for sediments with varying properties.
机译：由于对接触途径的了解不足以及接触与影响之间的因果关系不佳，限制了使用沉积物质量指南来预测沉积物中金属的毒性。对于暴露于Cu的沉积物10天，已证明通过溶解和饮食中的Cu暴露途径对两栖动物Melita plumulosa产生了毒性，但是对于双壳类短毛线虫Trisella trigonella和Tellina deltoidalis，毒性主要是通过暴露于溶解的Cu铜对于具有中等有机碳含量（2.6-8.3％OC），淤泥（20-100％<63-μm颗粒），低酸挥发性硫化物（AVS）的相对氧化的沉积物，得出了这三种物种的急性毒性阈值基于小于63μm沉积物组分的OC归一化Cu浓度。对于所有这三个物种，当溶解的铜浓度低于10μg/ L（在孔隙水和上覆水中）或低于12 mg Cu / g OC（对于<63μm的沉积物）时，均未观察到影响。对于淤泥/ OC特性为20 / 0.5、50 / 1或70/4％的沉积物，基于铅的基于Cu的阈值分别等于60、120或480 mg Cu / kg。对于AVS并不限制金属可用性的含氧/过硫酸盐沉积物，这种形式的沉积物质量准则将为毒性提供足够的保护，并改善对性质不同的沉积物的影响预测。

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  • 来源
    《Environmental toxicology and chemistry》 |2011年第7期|p.1599-1610|共12页
  • 作者

    David Strom; Stuart L. Simpson; Graeme E. Batley; Dianne F. Jolley;

  • 作者单位

    Centre for Environmental Contaminants Research, CSIRO Land and Water, Kirrawee, New South Wales, Australia ,School of Chemistry, University of Wollongong, New South Wales, Australia;

    Centre for Environmental Contaminants Research, CSIRO Land and Water, Kirrawee, New South Wales, Australia;

    Centre for Environmental Contaminants Research, CSIRO Land and Water, Kirrawee, New South Wales, Australia;

    School of Chemistry, University of Wollongong, New South Wales, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    copper; bivalves; organic carbon; particle size; sediment properties;

    机译：铜;双壳类有机碳粒度沉积物性质;

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