International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Copper Extraction from the Discarded Printed Circuit Board by Leaching

Author Affiliations

  • 1 Department of Chemical Engineering, Kongu Engineering College, Perundurai, 638052, INDIA

Res. J. Engineering Sci., Volume 2, Issue (1), Pages 11-14, January,26 (2013)

Abstract

This project deals with the experimental results of the leaching of Cu from Printed Circuit Boards (PCB) from obsolete electronic devices by means of leaching using different combinations of acidic mixtures followed by precipitation. Printed circuit boards were dismantled, cut into small pieces, and fed into a Ball mill. The powder obtained was leached by using the aqueous solutions H2SO4, H2SO4+HCl, HCl, and HCl+HNO3. The lowest values for the percentage of metal extraction were obtained with HSO4 while the HCl+HNO mixture exhibited an extraction of Cu in a maximum percentage. Precipitates were obtained at different pH values by neutralizing the leach liquors using NaOH. The HCl+HNO3 leach system presented the highest recovery values from the powder feed as well as from the leach liquor. Cu extraction after 120 minutes obtained with the various leach systems, 3.0N HCl+1.0N HNO3 exhibited the highest percentage Cu extraction (92.7% Cu).

References

  1. Kui Huang, Jie Guo and Zhenming Xuprinted circuit board: A review of current technologies and treatment status in china, J. of hazardous managementJhazmat, (2008)
  2. Masavetas, Nikola O.U, Spanou, PavlatouProduction Of Copper Powder From Printed Circuit Boards By Electrodeposition,Global Nest,11(2) (2009)
  3. Agarwal Perween, Shubhajit Pramanik and Sahu K.K., Recovery of copper from pcb leach solution by solvent extraction, Conf. Proceedings national metallurgical laboratory, csir, jamshedpur - 831007, india (2008)
  4. Kazuya Koyama, Mikiya Tanaka and Jae-chun Lee, Copper Leaching Behavior from Waste Printed Circuit Board in Ammoniacal Alkaline Solution, Materials Transactions, 47(7) 1788 to 179 (2006)
  5. Gramatyka P., Nowosielski R. and Sakiewicz P., Recycling of waste electrical and electronic equipment, JAMME 20(1-2) (2007)
  6. Zong Gao, Jianchi Li, C. Zhang, Printed circuit board Recycling:A State of Art survey, Dept of Industrial Engineering, Texas USA. IEEE(2002)
  7. Md Fazlul Bari, Mst. Noorzahan Begum, Shamsul Baharin Jamaludin, Kamarudin, Selective leaching for the recovery of copper from pcb, Hussin School of Materials Engineering, University Malaysia Perlis, 02600 Arau, Malaysia (2012)
  8. Chatterjee and Krishna Kumar, Effective electronic waste management and recycling process involving formal and non-formal sectors, Intl J. of Physical Sciences,13), 893-905 (2009)
  9. Hugo Marcelo Veit et.al, Recovery of copper from printed circuit boards scraps by mechanical processing and electrometallurgy, LACOR, PPGEM, Universidade Federal do Rio Grande do Sul, Campus do Vale (2004)
  10. Havlik T., Orac D., Petranikova and Miskufova A., Hydrometallurgical treatment of used printed circuit board after thermal treatment, Elsevier-waste management- j.wasman, (2011)