The leaching behaviour of Cu, Zn and Pb from waste printed circuit boards by [BSO4HPy]HSO4

IF 0.5 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES International Journal of Environment and Pollution Pub Date : 2019-11-21 DOI:10.1504/ijep.2019.103741

S. Zhang, Mengjun Chen, Jiqin Wang, Bin Wang, Jinxiu Huang, Shu Chen

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引用次数: 0

Abstract

Currently, researches are mainly focused on how to recycle valuable metals from waste printed circuit boards (WPCBs), but rarely on the toxic substances, such as zinc and lead, during the recycling process. In this research, the effect of zinc and lead during the process of leaching copper from WPCBs by an acidic ionic liquid (IL), N-sulfobutylpyridinium hydrosulphate ([BSO4HPy]HSO4), was investigated in detail. Results showed that copper and zinc could be successfully leached out by [BSO4HPy]HSO4. When 1 g of 0.1 to 0.25 mm WPCBs powder was leached by 25 mL of 80% (v/v) ionic liquid and 10 mL of 30% hydrogen peroxide at 40°C for 2 h, copper and zinc leaching rate could be up to 99.75% and 93.02%, respectively. H2O2 added amount, solid-liquid ratio and temperature could significantly impact the leaching rate of copper and zinc. On the contrary, lead leaching rate is hardly influenced by these factors, maintaining at around 2%. Thus, during the leaching process, zinc could significantly influence the leaching of copper, which was totally different for lead. Leaching kinetics analysis indicated that the leaching of copper and zinc is controlled by solid film diffusion, and the leaching of lead is controlled by chemical reaction.

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[BSO4HPy]HSO4浸出废印刷电路板中Cu、Zn和Pb的行为

目前，研究主要集中在如何从废弃印刷电路板中回收有价值的金属，而很少涉及回收过程中的有毒物质，如锌和铅。在本研究中，详细研究了酸性离子液体（IL）N-磺基丁基吡啶氢硫酸盐（[BSO4HPy]HSO4）从WPCB中浸出铜过程中锌和铅的影响。结果表明，[BSO4HPy]HSO4可成功浸出铜和锌。当1g 0.1至0.25mm的WPCB粉末在40°C下用25mL 80%（v/v）离子液体和10mL 30%过氧化氢浸出2小时时，铜和锌的浸出率分别可达99.75%和93.02%。H2O2的加入量、固液比和温度对铜和锌的浸出率有显著影响。相反，铅浸出率几乎不受这些因素的影响，保持在2%左右。因此，在浸出过程中，锌会显著影响铜的浸出，这与铅完全不同。浸出动力学分析表明，铜、锌的浸出受固膜扩散控制，铅的浸出受化学反应控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Environment and Pollution 环境科学-环境科学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： IJEP provides an international forum in the field of environment and pollution and addresses early and medium-term challenges involving scientific prediction, modelling and assessment. It focuses on ground-breaking research in the science of environmental pollution, at the early scientific stage. It is one of three key journals which together offer complete coverage of environmental issues: IJETM focuses on technical/engineering, policy and management solutions for environmental problems, and IJGEnvI focuses on future, longer-term environmental scenarios, ecological economics, climate change and biodiversity.