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首页> 外文期刊>Environmental Science & Technology >The Abandoned E-Waste Recycling Site Continued to Act As a Significant Source of Polychlorinated Biphenyls: An in Situ Assessment Using Fugacity Samplers
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The Abandoned E-Waste Recycling Site Continued to Act As a Significant Source of Polychlorinated Biphenyls: An in Situ Assessment Using Fugacity Samplers

机译：废弃的电子废物回收站继续充当多氯联苯的重要来源：使用逸度取样器的原位评估

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摘要

The recycling of e-waste has attracted significant attention due to emissions of polychlorinated biphenyls (PCBs) and other contaminants into the environment We measured PCB concentrations in surface soils, air equilibrated with the soil, and air at 1.5-m height using a fugacity sampler in an abandoned electronic waste (e-waste) recycling site in South China. The total concentrations of PCBs in the soils were 39.8-940 ng/g, whereas the concentrations in air equilibrated with the soil and air at 1.5 m height were 487-8280 pg/m~3 and 287-7380 pg/m~3, respectively. The PCB concentrations displayed seasonal variation; they were higher in winter in the soils and higher in summer in the air, indicating that the emission of PCBs from the soil was enhanced during hot seasons for the relatively high temperature or additional sources, especially for low-chlorinated PCBs. We compared two methods (traditional fugacity model and fugacity sampler) for assessing the soil-air partition coefficients (K_(sa)) and the fugacity fractions of PCBs. The results suggested that the fugacity sampler provided more instructive and practical estimation on K_(sa) values and trends in air-soil exchange, especially for low-chlorinated PCBs. The abandoned e-waste burning site still acted as a significant source of PCBs many years after the prohibition on open burning.
机译：由于多氯联苯（PCB）和其他污染物向环境中的排放，电子废物的回收备受关注，我们使用逸度采样器测量了表层土壤，与土壤平衡的空气以及1.5 m高的空气中的PCB浓度。在中国南方一个废弃的电子废物（电子废物）回收站。土壤中多氯联苯的总浓度为39.8-940 ng / g，而与土壤和1.5 m高的空气平衡的空气中浓度为487-8280 pg / m〜3和287-7380 pg / m〜3，分别。多氯联苯浓度显示季节性变化；它们在冬季的土壤中较高，而在夏季的空气中较高，这表明在相对较高的温度或其他来源的炎热季节，土壤中多氯联苯的排放增加，尤其是对于低氯化多氯联苯。我们比较了两种方法（传统的逸度模型和逸度采样器）来评估土壤空气分配系数（K_（sa））和PCBs的逸度分数。结果表明，逸度采样器对空气中的K_（sa）值和空气交换趋势提供了更具指导性和实用性的估计，尤其是对于低氯化PCB而言。在禁止露天焚烧多年之后，废弃的电子垃圾焚烧场仍然是多氯联苯的重要来源。

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  • 来源
    《Environmental Science & Technology》 |2016年第16期|8623-8630|共8页
  • 作者

    Yan Wang; Chunling Luo; Shaorui Wang; Zhineng Cheng; Jun Li; Gan Zhang;

  • 作者单位

    Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

  • 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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