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Characterization of PCBs from Obsolete Computers Aiming the Recovery of Precious Metals

机译：旨在回收贵金属的过时计算机中PCB的特性

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摘要

The massive application of electrical and electronic equipments increased the production and industry development, which leads to a rising environmental and economic problem: the increase of e-waste's generation. The main cause to explain this problem is the combination between the diversification of electric and electronic device's applications and programmed obsolescence, which promotes a high generation the so-called waste electrical and electronic equipments (WEEE). Printed circuit boards (PCBs) are present in almost all WEEE and their heterogenous composition have a considerable amount of metals, including some precious ones. It is necessary to think about viable alternatives for the destination of WEEE, mostly PCBs'. Recycling is an environmental friendly purpose for PCBs' destination, combined with economic advantage from the recovery of metals. The choice of correct process to recycling depends on the composition of the PCBs, so the correct characterization is required. This work aims to characterize two different PCBs from obsolete computers: motherboard and memory board, concluding that they have 35.5 and 18.92% of metals, respectively, including precious metals as silver and gold. Also, memory board has 0.122% of these precious metals to the detriment of 0.047% from motherboard.
机译：电气和电子设备的大量应用促进了生产和工业发展，从而导致了日益严重的环境和经济问题：电子废物的产生增加了。解释此问题的主要原因是电气和电子设备的应用多样化与计划过时之间的结合，这促进了所谓的废弃电气电子设备（WEEE）的大量生产。几乎所有WEEE中都存在印刷电路板（PCB），其异质成分包含大量金属，包括一些贵重金属。有必要考虑WEEE目的地的可行替代方案，主要是PCB。回收是PCB目的地的环保目的，再加上金属回收带来的经济优势。选择正确的回收方法取决于PCB的成分，因此需要正确的表征。这项工作的目的是从陈旧的计算机中表征两种不同的PCB：主板和内存板，认为它们分别含有35.5％和18.92％的金属，包括贵金属，如银和金。此外，内存板中有0.122％的这些贵金属会损害主板的0.047％。

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  • 来源
  • 会议地点 Phoenix(US)
  • 作者

    Mariana Alves de Carvalho; Marcos Paulo Kohler Caldas; Jorge Alberto Soares Tenorio; Denise Crocce Romano Espinosa;

  • 作者单位

    LAREX (Laboratorio de Reciclagem, Tratamento de Residuos e Extracao) - Department of Chemical Engineering, Polytechnic School of University of Sao Paulo, Rua do Lago, 250, 2nd floor, Sao Paulo 05508-080, Brazil;

    LAREX (Laboratorio de Reciclagem, Tratamento de Residuos e Extracao) - Department of Chemical Engineering, Polytechnic School of University of Sao Paulo, Rua do Lago, 250, 2nd floor, Sao Paulo 05508-080, Brazil;

    LAREX (Laboratorio de Reciclagem, Tratamento de Residuos e Extracao) - Department of Chemical Engineering, Polytechnic School of University of Sao Paulo, Rua do Lago, 250, 2nd floor, Sao Paulo 05508-080, Brazil;

    LAREX (Laboratorio de Reciclagem, Tratamento de Residuos e Extracao) - Department of Chemical Engineering, Polytechnic School of University of Sao Paulo, Rua do Lago, 250, 2nd floor, Sao Paulo 05508-080, Brazil;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    WEEE; Recycling; PCB; Characterization; Precious metals;

    机译：WEEE;回收； PCB;表征；贵金属;

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