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首页> 外文期刊>Environmental Science & Technology >Emissions of Tetrachlorobiphenyls (PCBs 47, 51, and 68) from Polymer Resin on Kitchen Cabinets as a Non-Aroclor Source to Residential Air
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Emissions of Tetrachlorobiphenyls (PCBs 47, 51, and 68) from Polymer Resin on Kitchen Cabinets as a Non-Aroclor Source to Residential Air

机译：厨柜中的高分子树脂作为非阿洛素源的四氯联苯（PCB 47、51和68）的排放量

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摘要

Both Aroclor and non-Aroclor sources of airborne polychlorinated biphenyls (PCBs) were found in residential homes. We deployed passive air samplers at 16 residences and found PCB-47, PCB-51, and PCB-68 to account for up to 50% of measured indoor ΣPCBs (2700 pg m~(–3)). Although PCB-47 and PCB-51 are neurotoxins present in Aroclor mixtures (<2.5 and <0.3 wt %, respectively), we found them at much higher levels than expected for any Aroclor source. PCB-68 is not present in Aroclor mixtures. Another non-Aroclor congener, PCB-11, a byproduct of pigment manufacturing, was found inside and outside of every household and was frequently the predominate congener. We conducted direct measurements of surface emissions and identified finished cabinetry to be a major source of PCB-47, PCB-51, and PCB-68. We hypothesize that these congeners are inadvertent byproducts of polymer sealant manufacturing and produced from the decomposition of 2,4-dichlorobenzoyl peroxide used as an initiator in free-radical polymerization of polyester resins. The presence of these three compounds in polymer products, such as silicone, has been widely noted, but to our knowledge they have never been shown to be a significant environmental source of PCBs.
机译：在住宅中发现了空气中的多氯联苯（PCB）的Aroclor和非Aroclor来源。我们在16个住宅区部署了无源空气采样器，发现PCB-47，PCB-51和PCB-68最多占室内ΣPCB的50％（2700 pg m〜（–3））。尽管PCB-47和PCB-51是Aroclor混合物中的神经毒素（分别<2.5和<0.3 wt％），但我们发现它们的含量远高于任何Aroclor来源的预期水平。 Aroclor混合物中不存在PCB-68。在每个家庭的内部和外部都发现了另一种非Aroclor同类产品PCB-11，它是颜料制造的副产品，通常是主要的同类产品。我们直接测量了表面排放，并确定了成品橱柜是PCB-47，PCB-51和PCB-68的主要来源。我们假设这些同类物是聚合物密封胶生产中的无意副产品，是由在聚酯树脂的自由基聚合反应中用作引发剂的2,4-二氯苯甲酰过氧化物的分解产生的。众所周知，这三种化合物存在于聚合物产品（如有机硅）中，但据我们所知，它们从未被证明是PCB的重要环境来源。

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  • 来源
    《Environmental Science & Technology》 |2018年第9期|5154-5160|共7页
  • 作者

    NicholasJ. Herkert; Jacob C. Jahnke; Keri C. Hornbuckle;

  • 作者单位

    Department of Civil and Environmental Engineering, IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, United States;

    Department of Civil and Environmental Engineering, IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, United States;

    Department of Civil and Environmental Engineering, IIHR-Hydroscience and Engineering, The University of Iowa, Iowa City, Iowa 52242, 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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