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RoHS regulated Substances in Mixed Plastics from Waste Electrical and Electronic Equipment

机译：电气和电子设备废料中混合塑料中的RoHS管制物质

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摘要

The disposal and recovery of plastics from waste electrical and electronic equipment (WEEE) are of considerable importance, both from an environmental and an economic perspective. This paper presents the results of a study investigating current concentrations of hazardous substances in mixed plastics from WEEE and their implications for an environmentally sound recovery. The study included 53 sampling campaigns for mixed plastics from WEEE. The samples were analyzed with regard to heavy metals (cadmium, chromium, mercury, and lead) and flame retardants (PentaBDE, OctaBDE, DecaBDE, DecaBB) regulated in the RoHS Directive. Besides these substances, other brominated flame retardants known to occur in electronics (HBCD, TBBPA) as well as the total bromine and phosphorus contents were considered. Results show that no mixed plastics fraction from WEEE is completely free from substances regulated in the RoHS Directive. The lowest number and average concentrations were found in flat screen monitors. The highest concentrations were found in mixed plastics from CRT monitors and TVs. Mixed plastics fractions with high average concentrations of heavy metals originate from the treatment of small household appliances (cadmium), ICT equipment (lead), and consumer equipment (lead). Mixed plastics fractions with high average concentrations of brominated flame retardants mainly originate from the treatment of small household appliances for high temperature applications (DecaBDE), CRT monitors (OctaBDE and DecaBDE) and consumer equipment (DecaBDE), in particular CRT TVs (DecaBDE). To avoid a dissipation of hazardous substances into plastics and the environment, it is recommended that mixed plastics from WEEE are subject to a strict quality management.
机译：从环境和经济的角度来看，从废弃的电气和电子设备（WEEE）中处理和回收塑料都非常重要。本文介绍了一项研究结果，该研究调查了WEEE中混合塑料中有害物质的当前浓度及其对无害环境回收的意义。该研究包括WEEE的53个混合塑料采样活动。根据RoHS指令对样品进行了重金属（镉，铬，汞和铅）和阻燃剂（五溴二苯醚，八溴二苯醚，十溴二苯醚，十溴联苯）的分析。除这些物质外，还考虑了电子产品中已知的其他溴化阻燃剂（HBCD，TBBPA）以及总溴和磷含量。结果表明，WEEE中没有混合的塑料馏分完全不含RoHS指令中规定的物质。在平板显示器中发现最低的数量和平均浓度。在CRT监视器和电视的混合塑料中发现了最高的浓度。具有较高平均重金属浓度的混合塑料馏分源自对小型家用电器（镉），ICT设备（铅）和消费类设备（铅）的处理。具有高平均浓度的溴化阻燃剂的混合塑料馏分主要来自用于高温应用（DecaBDE），CRT显示器（OctaBDE和DecaBDE）和消费类设备（DecaBDE）的小型家用电器的处理，尤其是CRT电视（DecaBDE）。为避免有害物质散布到塑料和环境中，建议对WEEE的混合塑料进行严格的质量管理。

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  • 来源
    《Environmental Science & Technology》 |2012年第2期|p.628-635|共8页
  • 作者

    Patrick A. Wager; Mathias Schluep; Esther Mueller; Rolf Gloor;

  • 作者单位

    Technology and Society Laboratory, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5,9014 St. Gallen, Switzerland;

    Technology and Society Laboratory, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5,9014 St. Gallen, Switzerland;

    Technology and Society Laboratory, Swiss Federal Laboratories for Materials Science and Technology (Empa), Lerchenfeldstrasse 5,9014 St. Gallen, Switzerland;

    Bachema AG, Ruetistrasse 22, 8952 Schlieren, Switzerland;

  • 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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