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首页> 外文期刊>Environmental Science & Technology >Silver Nanoparticle-Algae Interactions: Oxidative Dissolution, Reactive Oxygen Species Generation and Synergistic Toxic Effects
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Silver Nanoparticle-Algae Interactions: Oxidative Dissolution, Reactive Oxygen Species Generation and Synergistic Toxic Effects

机译：银纳米颗粒-藻类相互作用：氧化溶解，活性氧的产生和协同毒性作用。

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摘要

The short-term toxicity of citrate-stabilized silver nanoparticles (AgNPs) and ionic silver Ag(Ⅰ) to the ichthyotoxic marine raphidophyte Chattonella marina has been examined using the fluorometric indicator alamarBlue. Aggregation and dissolution of AgNPs occurred after addition to GSe medium while uptake of dissolved Ag(Ⅰ) occurred in the presence of C. marina. Based on total silver mass, toxicity was much higher for Ag(Ⅰ) than for AgNPs. Cysteine, a strong Ag(Ⅰ) ligand, completely removed the inhibitory effects of Ag(Ⅰ) and AgNPs on the metabolic activity of C. marina, suggesting that the toxicity of AgNPs was due to the release of Ag(Ⅰ). Synergistic toxic effects of AgNPs/Ag(Ⅰ) and C. marina to fish gill cells were observed with these effects possibly attributable to enhancement in the generation of reactive oxygen species by C. marina on exposure of the organism to silver.
机译：利用荧光指示剂alamarBlue考察了柠檬酸盐稳定的银纳米颗粒（AgNPs）和离子银Ag（Ⅰ）对鱼鳞毒性海洋水生植物斜纹夜蛾的短期毒性。加入GSe培养基后，AgNPs发生聚集和溶解，而在C. marina的存在下吸收了溶解的Ag（Ⅰ）。基于银的总质量，Ag（Ⅰ）的毒性比AgNPs高得多。半胱氨酸是一种强大的Ag（Ⅰ）配体，完全消除了Ag（Ⅰ）和AgNPs对滨海梭菌代谢活性的抑制作用，表明AgNPs的毒性是由于Ag（Ⅰ）的释放所致。观察到AgNPs / Ag（Ⅰ）和滨海假单胞菌对鱼g细胞的协同毒性作用，这些作用可能归因于滨海假单胞菌使生物暴露于银增加了活性氧的产生。

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  • 来源
    《Environmental Science & Technology》 |2012年第16期|p.8731-8738|共8页
  • 作者

    Di He; Juan Jose Dorantes-Aranda; T. David Waite;

  • 作者单位

    School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW, Australia 2052;

    School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW, Australia 2052;

    School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW, Australia 2052;

  • 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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