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首页> 外文期刊>Environmental toxicology and chemistry >TOXICITY OF SILICON CARBIDE NANOWIRES TO SEDIMENT-DWELLING INVERTEBRATES IN WATER OR SEDIMENT EXPOSURES
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TOXICITY OF SILICON CARBIDE NANOWIRES TO SEDIMENT-DWELLING INVERTEBRATES IN WATER OR SEDIMENT EXPOSURES

机译：碳化硅纳米粉对水中或沉积物暴露中的沉积物无脊椎动物的毒性

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摘要

Silicon carbide nanowires (SiCNW) are insoluble in water. When released into an aquatic environment, SiCNW would likely accumulate in sediment. The objective of this study was to assess the toxicity of SiCNW to four freshwater sediment-dwelling organisms: amphipods (Hyalella azteca), midges (Chironomus dilutus), oligochaetes {Lumbriculus variegatus), and mussels (Lampsilis siliquoidea). Amphipods were exposed to either sonicated or nonsonicated SiCNW in water (1.0g/L) for 48h. Midges, mussels, and oligochaetes were exposed only to sonicated SiCNW in water for 96 h. In addition, amphipods were exposed to sonicated SiCNW in whole sediment for 10 d (44% SiCNW on dry wt basis). Mean 48-h survival of amphipods exposed to nonsonicated SiCNW in water was not significantly different from the control, whereas mean survival of amphipods exposed to sonicated SiCNW in two 48-h exposures (0 or 15% survival) was significantly different from the control (90 or 98% survival). In contrast, no effect of sonicated SiCNW was observed on survival of midges, mussels, or oligochaetes. Survival of amphipods was not significantly reduced in 10-d exposures to sonicated SiCNW either mixed in the sediment or layered on the sediment surface. However, significant reduction in amphipod biomass was observed with the SiCNW either mixed in sediment or layered on the sediment surface, and the reduction was more pronounced for SiCNW layered on the sediment. These results indicated that, under the experimental conditions, nonsonicated SiCNW in water were not acutely toxic to amphipods, sonicated SiCNW in water were acutely toxic to the amphipods, but not to other organisms tested, and sonicated SiCNW in sediment affected the growth but not the survival of amphipods.
机译：碳化硅纳米线（SiCNW）不溶于水。当释放到水生环境中时，SiCNW可能会在沉积物中积累。这项研究的目的是评估SiCNW对四种淡水沉积物生物的毒性：两栖动物（Hyalella azteca），mid（Chironomus dilutus），低聚类（Lumbriculus variegatus）和贻贝（Lampsilis siliquoidea）。将两足动物暴露于水中（1.0g / L）的超声处理或非超声处理的SiCNW中48h。 ges，贻贝和寡食仅在水中经过声处理的SiCNW暴露96小时。此外，将两足动物暴露于整个沉积物中的超声SiCNW中10 d（以干重计为44％SiCNW）。暴露于非超声处理的SiCNW在水中的两栖动物的平均48小时生存期与对照组无显着差异，而两次超声处理的SiCNW接触的两栖动物的平均生存期（0或15％生存期）与对照组有显着差异（ 90或98％的生存率）。相反，未观察到超声处理的SiCNW对mid，贻贝或低毛survival的存活的影响。混合在沉积物中或分层沉积在沉积物中的超声SiCnw暴露10天后，两栖动物的存活率并未显着降低。然而，无论是混合在沉积物中还是分层沉积在沉积物中的SiCNW，都可以观察到两栖类生物量的显着减少，而沉积在沉积物中的SiCNW的减少更为明显。这些结果表明，在实验条件下，水中未超声处理的SiCNW对两栖动物无剧毒，水中超声处理的SiCNW对两栖动物无剧毒，但对其他受试生物却无毒，沉淀物中的超声处理的SiCNW对生长没有影响。两栖动物的生存。

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  • 来源
    《Environmental toxicology and chemistry》 |2011年第4期|p.981-987|共7页
  • 作者

    Joseph N. MwANG; Ning Wang; Andrew Ritts; James L. Kunz; Christopher G. Ingersoll; Hao Li; Baolin Deng;

  • 作者单位

    Department of Civil and Environmental Engineering, University of Missouri, Columbia, Missouri, USA,U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri;

    U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri;

    University of Missouri, Columbia, Missouri, USA;

    U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri;

    U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri;

    University of Missouri, Columbia, Missouri, USA;

    Department of Civil and Environmental Engineering, University of Missouri, Columbia, Missouri, USA;

  • 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

    silicon carbide nanowires; nanomaterials; sediment; toxicity; invertebrates;

    机译：碳化硅纳米线;纳米材料沉淀;毒性;无脊椎动物;

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