Recycling Polymer-Rich Waste Printed Circuit Boards at High Temperatures: Recovery of Value-Added Carbon Resources

被引：28
作者：
Sahajwalla V. [1 ]
Cayumil R. [1 ]
Khanna R. [1 ]
Ikram-Ul-Haq M. [1 ]
Rajarao R. [1 ]
Mukherjee P.S. [2 ]
Hill A. [3 ]
机构：
[1] Centre for Sustainable Materials Research and Technology (SMaRT), School of Materials Science and Engineering, The University of New South Wales UNSW Australia, Sydney, 2052, NSW
[2] Advanced Materials Technology Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar
[3] CSIRO Process Science & Engineering, Clayton, Melbourne, 3168, VIC
来源：
Journal of Sustainable Metallurgy | 2015年 / 1卷 / 1期
关键词：
Disordered carbons; E-waste; PCBs; Recycling; Thermal transformations;
D O I：
10.1007/s40831-014-0002-4
中图分类号：
学科分类号：
摘要：
High-temperature transformation studies were carried out on polymer-rich waste printed circuit boards (PCBs) in the temperature range of 750–1,350 °C in argon atmosphere. Copper-rich metallic fractions started to separate out as foils/droplets at temperatures above 950 °C producing significant quantities of carbonaceous residue. In-depth characterisation of the residue was carried out using X-ray diffraction, Raman spectroscopy, SEM/EDS, surface area analysis, and LECO measurements. The recovery of carbons from waste PCBs reached up to 25 % of total weight. These carbons generally had a disordered structure with 3–4 layers stacking along the c-axis. The presence of metals in the carbonaceous residue became negligibly small at 1,350 °C, significantly enhancing the quality of the carbonaceous product (carbon content: 52–74 wt%). This study has shown that potentially vast reserves of carbon could be recovered from e-waste through appropriate recycling, while minimising the impact of waste on the environment. © 2015, The Minerals, Metals, & Materials Society (TMS).
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页码：75 / 84
页数：9
相关论文
共 28 条
  • [1] Proposal for a directive of the European Parliament and of the council on waste electrical and electronic equipment, Official Journal of the European Communities, (2000)
  • [2] Gover J.E., Review of the competitive status of the United States Electronics Industry, Technological competitiveness: contemporary and historical perspectives on the electrical, electronics, and computer industries, pp. 57-74, (1993)
  • [3] Call for Global Action on E-Waste. United Nations Environment Programme, (2006)
  • [4] International Association of Electronics Recyclers Industry Report, (2006)
  • [5] Tipping point: Australia’s e-waste crisis, (2008)
  • [6] Management of Electronic Waste in the United States: Approach 2, (2007)
  • [7] Electronics Waste Management in the United States: Approach 1, (2008)
  • [8] Puckett J., Byster L., Westervelt S., Gutierrez R., Davis S., Hussain A., Dutta M., Exporting harm: the high-tech trashing of Asia, (2002)
  • [9] Pinto V., E-waste hazard: the impending challenge, Indian J Occup Environ Med, 12, pp. 65-70, (2008)
  • [10] Hall W.J., Williams P.T., Separation and recovery of materials from scrap printed circuit boards, Resour Conserv Recy, 51, pp. 691-709, (2007)
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