Printed circuit board recycling: Physical processing and copper extraction by selective leaching

Waste Management
Flávia P C SilvasJ A S Tenório

Abstract

Global generation of waste electrical and electronic equipment (WEEE) is about 40 million tons per year. Constant increase in WEEE generation added to international legislations has improved the development of processes for materials recovery and sustainability of electrical and electronic industry. This paper describes a new hydrometallurgical route (leaching process) to recycle printed circuit boards (PCBs) from printers to recover copper. Methodology included PCBs characterization and a combined route of physical and hydrometallurgical processing. Magnetic separation, acid digestion and chemical analysis by ICP-OES were performed. On leaching process were used two stages: the first one in a sulfuric media and the second in an oxidant media. The results showed that the PCBs composition was 74.6wt.% of non-magnetic material and 25.4wt.% of magnetic one. The metallic fraction corresponded to 44.0wt.%, the polymeric to 28.5wt.% and the ceramic to 27.5wt.%. The main metal was copper and its initial content was 32.5wt.%. On sulfuric leaching 90wt.% of Al, 40wt.% of Zn and 8.6wt.% of Sn were extracted, whereas on oxidant leaching tests the extraction percentage of Cu was 100wt.%, of Zn 60wt.% and of Al 10wt.%. At the end of the hyd...Continue Reading

References

May 22, 2003·Journal of Hazardous Materials·Jirang Cui, Eric Forssberg
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Mar 9, 2012·Journal of Hazardous Materials·L FlandinetJ Fouletier

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Citations

Oct 30, 2016·Waste Management·Robinson Torres, Gretchen T Lapidus
Mar 30, 2017·Topics in Current Chemistry·Chao NingGordon McKay
Jan 18, 2017·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Abhishek Kumar AwasthiJinhui Li
May 9, 2018·Environmental Science and Pollution Research International·Sabah M AbdelbasirRania Seif El-Nasr
Jun 23, 2020·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Debarati DasMahua Ghosh Chaudhuri
Jan 17, 2017·Environmental Science and Pollution Research International·Anshu Priya, Subrata Hait
Sep 11, 2020·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Amit KumarTravis Janke
May 11, 2018·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Kazuho InabaHidetaka Takigami
Jul 4, 2021·Environmental Science and Pollution Research International·Jingying LiShuli Gong
Jun 18, 2020·ACS Omega·Jose Angel BarraganErika Roxana Larios-Durán
Sep 12, 2020·ACS Nano·Mohannad MayyasKourosh Kalantar-Zadeh

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