an official journal of: published by:
an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU
Home

 

GO TO

INDIUM EXTRACTION FROM LCD SCREENS

  • Adjanara P. Gabriel - PPGE3M - Materials Engineering Department, Federal University of Rio Grande do Sul - UFRGS. Av. Bento Gonçalves, Brazil
  • Bruna Baggio Giordani - PPGE3M - Materials Engineering Department, Federal University of Rio Grande do Sul - UFRGS. Av. Bento Gonçalves, Brazil
  • Angela Kasper - PPGE3M - Materials Engineering Department, Federal University of Rio Grande do Sul - UFRGS. Av. Bento Gonçalves, Brazil
  • Hugo M. Veit - PPGE3M - Materials Engineering Department, Federal University of Rio Grande do Sul - UFRGS. Av. Bento Gonçalves, Brazil

DOI 10.31025/2611-4135/2018.13704

Released under CC BY-NC-ND

Copyright: © 2018 CISA Publisher

Abstract

Liquid crystal display (LCD) screens are present in a variety of electronic devices including televisions, computers, cell phones, global positioning system (GPS) devices, and others. On a vitreous layer of their inner surface these screens contain the chemical element indium. The presence of this element, considered a critical raw material due to its economic importance and scarce availability, renders the recycling of these screens increasingly attractive. The present study therefore was undertaken with the aim of extracting indium present in LCD screens. Damaged or obsolete monitors with LCD screens were collected and dismantled manually to remove the glass layer containing indium, and subsequently, the glass layer was ground in a ball mill. After grinding, leaching tests for indium extraction were performed. Hydrochloric acid (HCl), at different temperatures and concentrations, was tested as a leaching agent at solid/liquid ratios of 1/100 and 1/10. The results obtained reveal the possibility of extracting indium, with the best result being obtained with HCl 6 M, 60°C, s/l ratio 1/100, with 298 mg In/kg.​

Keywords

Editorial History

  • Received: 06 Mar 2018
  • Revised: 28 Jun 2018
  • Accepted: 06 Aug 2018
  • Available online: 17 Sep 2018

References

Bernardes A.M. and Veit H.M. (2015) Electronic Waste - Recycling Techniques. 1. ed. Springer v. 1. 158 p.

Chou W.L., Huang, Y.H. (2009) Electrochemical removal of indium ions from aqueous solution using iron electrodes. Journal of Hazardous Materials 172, 46–53.

Dias P., Schmidt L., Gomes L.B., Bettanin A., Veit H., Bernardes A.M. (2018) Recycling Waste Crystalline Silicon Photovoltaic Modules by Electrostatic Separation. Journal of Sustainable Metallurgy. Volume 4, Issue 2, pp 176–186.

Fisher M., Kingsbury, T., Headley, L. (2004). Sustainable electrical and electronic plastics recycling. In: Proceeding on 2004, International Symposium on Electronics and the Environment, 10–13th May, Scottsdale, Arizona, USA.

Gabriel A.P., Santana R.M.C., Veit H.M. (2014) Evaluation of Recycled Polymers From CRT Monitor Frames of Different Years of Manufacture. Progress in Rubber, Plastics and Recycling Technology, Vol. 30, No. 1.

Gramatyka P., Nowosielski R., Sakiewicz P. (2007) Recycling of waste electrical and electronic equipment. Journal of Achievements in Materials and Manufacturing Engineering. Vol 20. Issues 1-2.

Juchneski N.C., Scherer J, Grochau I.H, Veit H.M. (2013) Disassembly and characterization of liquid crystal screens. Waste Management & Research. 31(6):549-58.

Li J., Gao A.S., Dua H., Liu L. (2009) Recovery of valuable materials from waste liquid crystal display panel. Waste Management, 29 2033–2039.

Ruiz M. del C., Rodriguez M. H., Perino E., Olsina R. A..(2004) X-ray fluorescence analytical methodology for the determination of Nb, Ta, Fe and Mn extracted in hydrometallurgic processes. Lat. Am. appl. res. v.34 n.1 Bahía Blanca ene.

Schaik A.V., Reuter M.A. (2010) Dynamic modelling of E-waste recycling system performance based on product design. Minerals Engineering, 23, 192–210.

Savvilotidou V.,,Hahladakis J.N., Gidarakos E. (2015) Leaching capacity of metals–metalloids and recovery of valuable materials from waste LCDs. Waste Management 45 314–324.

Swain, B., Mishra, C., Hong, H.S., Cho, S.S., 2016. Beneficiation and recovery of indium from liquid-crystal-display glass by hydrometallurgy. Waste Management. 57, 207–214.

Virolainen S., Ibana D., Paatero E. (2011) Recovery of indium from indium tin oxide by solvent extraction. Hydrometallurgy 107 No 1-2. 56–61.

Wang X., Lu X., & Zhang S. (2013). Study on the waste liquid crystal display treatment: Focus on the resource Recovery. Journal of Hazardous Materials 244– 245; 342– 347.

Yang J., Retegan T. & Ekberg C. (2013) Indium recovery from discarded LCD panel glass by solvent extraction. Hydrometallurgy 137.

Related Contents