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Nanoplastic in the North Atlantic Subtropical Gyre

机译:北大西洋亚热带环流中的纳米塑料

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摘要

Plastics can be found in all ecosystems across the globe. This type of environmental pollution is important, even if its impact is not fully understood. The presence of small plastic particles at the micro- and nanoscales is of growing concern, but nanoplastic has not yet been observed in natural samples. In this study, we examined four size fractions (meso-, large micro-, small micro-, and nanoplastics) of debris collected in the North Atlantic subtropical gyre. To obtain the nanoplastic portion, we isolated the colloidal fraction of seawater. After ultrafiltration, the occurrence of nanoscale particles was demonstrated using dynamic light scattering experiments. The chemical fingerprint of the colloids was obtained by pyrolysis coupled with gas chromatography—mass spectrometry. We demonstrated that the signal was anthropogenic and attributed to a combination of plastics. The polymer composition varied among the size classes. At the micro- and nanoscales, polyvinyl chloride, polyethylene terephthalate, polystyrene and polyethylene were observed We also observed changes in the pyrolytic signals of polyethylene with decreasing debris size, which could be related to the structural modification of this plastic as a consequence of weathering.
机译:在全球所有生态系统中都可以找到塑料。即使不完全了解其影响,这种类型的环境污染也很重要。微米和纳米级小塑料颗粒的存在日益引起人们的关注,但尚未在天然样品中观察到纳米塑料。在这项研究中,我们检查了北大西洋亚热带回旋中收集到的碎片的四个大小部分(中,大,小,小和纳米塑料)。为了获得纳米塑料部分,我们分离了海水的胶体部分。超滤后,使用动态光散射实验证明了纳米级颗粒的出现。通过热解结合气相色谱-质谱法获得了胶体的化学指纹。我们证明了该信号是人为的,并归因于塑料的组合。聚合物组成在尺寸类别之间变化。在微米和纳米尺度上,观察到聚氯乙烯,聚对苯二甲酸乙二酯,聚苯乙烯和聚乙烯。我们还观察到聚乙烯的热解信号随着碎片尺寸的减小而发生变化,这可能与这种塑料的结构改性有关(由于风化)。

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  • 来源
    《Environmental Science & Technology》 |2017年第23期|13689-13697|共9页
  • 作者单位

    Laboratoire des Interactions Moleculaires et Reactivite Chirnique et Photochimique (IMRCP), UMR CNRS 5623, Universite Paul Sabatier-UPS, Batiment 2R1, 3eme etage, 118, route de Narbonne, 31062 Toulouse Cedex 09, France;

    Laboratoire Geosciences Rennes, UMR6118 CNRS/Universite de Rennes 1, 263 Avenue General Leclerc, 35000 Rennes, France;

    Laboratoire des Interactions Moleculaires et Reactivite Chirnique et Photochimique (IMRCP), UMR CNRS 5623, Universite Paul Sabatier-UPS, Batiment 2R1, 3eme etage, 118, route de Narbonne, 31062 Toulouse Cedex 09, France;

    Laboratoire Geosciences Rennes, UMR6118 CNRS/Universite de Rennes 1, 263 Avenue General Leclerc, 35000 Rennes, France;

    Cordouan Technologies, 11 avenue de Canterrane, 33600 Pessac, France;

    Laboratoire des Interactions Moleculaires et Reactivite Chirnique et Photochimique (IMRCP), UMR CNRS 5623, Universite Paul Sabatier-UPS, Batiment 2R1, 3eme etage, 118, route de Narbonne, 31062 Toulouse Cedex 09, France;

    Laboratoire Geosciences Rennes, UMR6118 CNRS/Universite de Rennes 1, 263 Avenue General Leclerc, 35000 Rennes, France;

  • 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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  • 正文语种 eng
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