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首页> 外文期刊>Environmental Science & Technology >Environmental Risk Implications of Metals in Sludges from Waste Water Treatment Plants: The Discovery of Vast Stores of Metal-Containing Nanoparticles
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Environmental Risk Implications of Metals in Sludges from Waste Water Treatment Plants: The Discovery of Vast Stores of Metal-Containing Nanoparticles

机译：废水处理厂污泥中金属的环境风险含义：发现大量含有金属的纳米颗粒

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摘要

Nanoparticle (NP) assessment in sludge materials, although of growing importance in eco- and biotoxicity studies, is commonly overlooked and, at best, understudied. In the present study, sewage sludge samples from across the mega-city of Shanghai, China were investigated for the first time using a sequential extraction method coupled with single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) to quantify the abundance of metal-containing NPs in the extraction fractions and transmission electron microscopy to specifically identify the nanophases present. In general, most sludges observed showed high concentrations of Cr, Cu, Cd, Ni, Zn, and Pb, exceeding the maximum permitted values in the national application standard of acid soil in China. NPs in these sludges contribute little to the volume and mass but account for about half of the total particle number. Based on electron microscopy techniques, various NPs were further identified, including Ti-, Fe-, Zn-, Sn-, and Pb-containing NPs. All NPs, ignored by traditional metal risk evaluation methods, were observed at a concentration of 10~7 -10~(11) particles/g within the bioavailable fraction of metals. These results indicate the underestimate or misestimation in evaluating the environmental risks of metals based on traditional sequential extraction methods. A new approach for the environmental risk assessment of metals, including NPs, is urgently needed.
机译：污泥材料中的纳米颗粒（NP）评估，尽管在生态和生物毒性研究中日益重要，但通常被忽视，充其量是未被充分研究。在本研究中，首次采用顺序萃取法结合单颗粒电感耦合等离子体质谱法（SP-ICP-MS）对中国上海特大城市的污水污泥样品进行了首次定量研究。萃取级分和透射电子显微镜中含有金属的NPs可以专门鉴定存在的纳米相。一般而言，观察到的大多数污泥显示出高浓度的Cr，Cu，Cd，Ni，Zn和Pb，超过了中国酸性土壤国家应用标准中的最大允许值。这些污泥中的NP对体积和质量的贡献很小，但约占颗粒总数的一半。基于电子显微镜技术，进一步确定了各种NP，包括含Ti，Fe，Zn，Sn和Pb的NP。在传统的金属风险评估方法中忽略的所有NP，在生物可利用金属中的浓度为10〜7 -10〜（11）颗粒/ g。这些结果表明，在基于传统的连续提取方法的金属评估环境风险中，低估或错误估计了。迫切需要一种新的方法来评估金属（包括纳米颗粒）的环境风险。

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  • 来源
    《Environmental Science & Technology》 |2017年第9期|4831-4840|共10页
  • 作者

    Feiyun Tou; Yi Yang; Jingnan Feng; Zuoshun Niu; Hui Pan; Yukun Qin; Xingpan Guo; Xiangzhou Meng; Min Liu; Michael F. Hochella;

  • 作者单位

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and;

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and ,Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China;

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and;

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and;

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and;

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and;

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and;

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;

    Key Laboratory of Geographic Information Science of the Ministry of Education, School of Geographic Sciences and;

    The Center for NanoBioEarth, Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, United States ,Geosciences Group, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States;

  • 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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