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首页> 外文期刊>Environmental Science & Technology >Plastic Debris in 29 Great Lakes Tributaries: Relations to Watershed Attributes and Hydrology
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Plastic Debris in 29 Great Lakes Tributaries: Relations to Watershed Attributes and Hydrology

机译：29个大湖支流中的塑料碎片：与流域属性和水文学的关系

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摘要

Plastic debris is a growing contaminant of concern in freshwater environments, yet sources, transport, and fate remain unclear. This study characterized the quantity and morphology of floating micro- and macroplastics in 29 Great Lakes tributaries in six states under different land covers, wastewater effluent contributions, population densities, and hydrologic conditions. Tributaries were sampled three or four times each using a 333 μm mesh neuston net. Plastic particles were sorted by size, counted, and categorized as fibers/lines, pellets/beads, foams, films, and fragments. Plastics were found in all 107 samples, with a maximum concentration of 32 particles/m~3 and a median of 1.9 particles/m~3. Ninety-eight percent of sampled plastic particles were less than 4.75 mm in diameter and therefore considered microplastics. Fragments, films, foams, and pellets/beads were positively correlated with urban-related watershed attributes and were found at greater concentrations during runoff-event conditions. Fibers, the most frequently detected particle type, were not associated with urban-related watershed attributes, wastewater effluent contribution, or hydrologic condition. Results from this study add to the body of information currently available on microplastics in different environmental compartments, including unique contributions to quantify their occurrence and variability in rivers with a wide variety of different land-use characteristics while highlighting differences between surface samples from rivers compared with lakes.
机译：在淡水环境中，塑料碎片是一种日益增长的令人关注的污染物，但其来源，运输和命运仍不清楚。这项研究表征了六个州的29个大湖支流在不同土地覆盖，废水流出量贡献，人口密度和水文条件下的漂浮微观和宏观塑料的数量和形态。支流使用333μm网格神经网络分别采样三到四次。将塑料颗粒按大小分类，计数并分类为纤维/线，粒料/珠子，泡沫，薄膜和碎片。在所有107个样品中都发现了塑料，最大浓度为32个颗粒/ m〜3，中位数为1.9个颗粒/ m〜3。百分之九十八的采样塑料颗粒的直径小于4.75毫米，因此被认为是微塑料。碎片，薄膜，泡沫和颗粒/珠子与城市相关的流域属性呈正相关，并且在径流事件条件下浓度较高。纤维是最常检测到的颗粒类型，与城市相关的流域属性，废水排放贡献或水文状况无关。这项研究的结果增加了当前有关不同环境区室中的微塑料的现有信息，包括对量化其在具有多种土地利用特征的河流中的发生和变异性进行定量分析的独特贡献，同时着重强调了与湖泊。

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  • 来源
    《Environmental Science & Technology》 |2016年第19期|10377-10385|共9页
  • 作者

    Austin K. Baldwin; Steven R. Corsi; Sherri A. Mason;

  • 作者单位

    U.S. Geological Survey, 8505 Research Way, Middleton, Wisconsin 53562, United States,U.S. Geological Survey, 230 Collins Road, Boise, ID 83702, USA;

    U.S. Geological Survey, 8505 Research Way, Middleton, Wisconsin 53562, United States;

    Department of Chemistry and Biochemistry, State University of New York at Fredonia, 280 Central Avenue, Science Complex 340, Fredonia, New York 14063, 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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  • 正文语种 eng
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