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首页> 外文期刊>Environmental Science & Technology >Multimodal Action and Selective Toxicity of Zerovalent Iron Nanoparticles against Cyanobacteria
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Multimodal Action and Selective Toxicity of Zerovalent Iron Nanoparticles against Cyanobacteria

机译：零价铁纳米颗粒对蓝细菌的多峰作用和选择性毒性

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摘要

Cyanobacteria pose a serious threat to water resources around the world. This is compounded by the fact that they are extremely resilient, having evolved numerous protective mechanisms to ensure their dominant position in their ecosystem. We show that treatment with nanoparticles of zerovalent iron (nZVI) is an effective and environmentally benign method for destroying and preventing the formation of cyanobacterial water blooms. The nanoparticles have multiple modes of action, including the removal of bioavailable phosphorus, the destruction of cyanobacterial cells, and the immobilization of microcystins, preventing their release into the water column. Ecotoxicological experiments showed that nZVI is a highly selective agent, having an EC_(50) of 50 mg/L against cyanobacteria; this is 20-100 times lower than its EC_(50) for algae, daphnids, water plants, and fishes. The primary product of nZVI treatment is nontoxic and highly aggregated FefOH)_3, which promotes flocculation and gradual settling of the decomposed cyanobacterial biomass.
机译：蓝细菌对世界各地的水资源构成了严重威胁。由于它们具有极强的复原力，已经进化出许多保护机制以确保其在生态系统中的主导地位，这一事实使情况更加复杂。我们表明，用零价铁（nZVI）的纳米颗粒进行处理是一种有效的，对环境无害的方法，用于破坏和防止蓝藻水华的形成。纳米颗粒具有多种作用方式，包括去除生物利用的磷，破坏蓝细菌细胞以及固定微囊藻毒素，以防止其释放到水柱中。生态毒理学实验表明，nZVI是一种高选择性试剂，对蓝细菌的EC_（50）为50 mg / L。对于藻类，水蚤，水生植物和鱼类，这比其EC_（50）低20-100倍。 nZVI处理的主要产物是无毒且高度聚集的FefOH_3，它促进了分解的蓝藻生物质的絮凝和逐渐沉降。

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  • 来源
    《Environmental Science & Technology》 |2012年第4期|p.2316-2323|共8页
  • 作者

    Blahoslav Marsalek; Daniel Jancula; Eliska Marsalkova; Miroslav Mashlan; Klara Safarova; Jiri Tucek; Radek Zboril;

  • 作者单位

    Institute of Botany, Academy of Sciences of the Czech Republic, Lidicka 25/27, 657 20 Brno, Czech Republic;

    Institute of Botany, Academy of Sciences of the Czech Republic, Lidicka 25/27, 657 20 Brno, Czech Republic;

    Institute of Botany, Academy of Sciences of the Czech Republic, Lidicka 25/27, 657 20 Brno, Czech Republic;

    Centre for Nanomaterial Research, Faculty of Science;

    Centre for Nanomaterial Research, Faculty of Science,Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Slechtitelu 11, 783 71 Olomouc, Czech Republic;

    Centre for Nanomaterial Research, Faculty of Science,Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Slechtitelu 11, 783 71 Olomouc, Czech Republic;

    Centre for Nanomaterial Research, Faculty of Science,Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, Slechtitelu 11, 783 71 Olomouc, Czech Republic;

  • 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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