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首页> 外文期刊>Journal of Cleaner Production >Lead during the leaching process of copper from waste printed circuit boards by five typical ionic liquid acids
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Lead during the leaching process of copper from waste printed circuit boards by five typical ionic liquid acids

机译：五种典型的离子液体酸浸出印刷电路板中的铜时的铅

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摘要

Waste printed circuit boards (WPCBs) contain both valuable resources and toxic substances, causing serious pollution to the environment if not treated appropriately. However, currently almost all researches are focused on valuable resources recovery, mainly copper, without considering the effect of toxic substances, such as lead, during the recycling process. Hence, we selected lead to represent the heavy metals and examined its behavior in typical ionic liquid (IL) acids leaching system. The factors that affect lead leaching rate, such as particle size, temperature, ionic liquid concentration, H2O2 adding amount and solid to liquid ratio, were examined in detail. The results show that particle size, IL acid concentration, solid to liquid ratio and hydrogen peroxide dosage hardly affect lead leaching rate for [BSO4HPy]HSO4, [BSO(3)HMIm]HSO4 and [MIm]HSO4, while lead leaching rate is significantly influenced by these factors for [BSO(3)HMIm]OTf and [BSO3HPy]OTf. For copper, it is totally on the opposite. It is hard to discuss the leaching kinetics for lead, while for the leaching of copper, diffusion plays a more important role than surface reaction. Most importantly, compared to lead, IL acids seem to show a selectivity for copper leaching out from WPCBs. Therefore, IL acids could be a prospective choice for leaching copper from WPCBs. (C) 2015 Elsevier Ltd. All rights reserved.
机译：废印刷电路板（WPCB）包含宝贵的资源和有毒物质，如果处理不当，会严重污染环境。但是，目前几乎所有的研究都集中在有价值的资源回收上，主要是铜，而没有考虑回收过程中铅等有毒物质的影响。因此，我们选择铅来代表重金属，并研究了其在典型的离子液体（IL）酸浸系统中的行为。详细研究了影响铅浸出率的因素，例如粒径，温度，离子液体浓度，H2O2添加量和固液比。结果表明，[BSO4HPy] HSO4，[BSO（3）HMIm] HSO4和[MIm] HSO4的粒径，IL酸浓度，固液比和过氧化氢剂量几乎不影响铅的浸出率，而铅的浸出率则显着受这些因素影响的[BSO（3）HMIm] OTf和[BSO3HPy] OTf。对于铜，则完全相反。很难讨论铅的浸出动力学，而对于铜的浸出，扩散起着比表面反应更重要的作用。最重要的是，与铅相比，IL酸似乎对从WPCB浸出的铜表现出选择性。因此，IL酸可能是从WPCB浸出铜的潜在选择。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Journal of Cleaner Production》 |2015年第15期|142-147|共6页
  • 作者

    Chen Mengjun; Zhang Sha; Huang Jinxiu; Chen Haiyan;

  • 作者单位

    Southwest Univ Sci & Technol, Minist Educ, Key Lab Solid Waste Treatment & Resource Recycle, Mianyang 621010, Peoples R China;

    Southwest Univ Sci & Technol, Minist Educ, Key Lab Solid Waste Treatment & Resource Recycle, Mianyang 621010, Peoples R China;

    Southwest Univ Sci & Technol, Minist Educ, Key Lab Solid Waste Treatment & Resource Recycle, Mianyang 621010, Peoples R China;

    Southwest Univ Sci & Technol, Minist Educ, Key Lab Solid Waste Treatment & Resource Recycle, Mianyang 621010, Peoples R China;

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

    WPCBs; Ionic liquids (ILs); Lead; Leaching kinetics;

    机译：WPCB;离子液体（ILs）;铅;浸出动力学;

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