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

APPLICATION OF SUB-CRITICAL WATER FOR RECOVERY OF TIN AND GLASS SUBSTRATES FROM LCD PANEL E-WASTE

  • Hiroyuki Yoshida - Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia / Ecology Research Center, Research Organization for the 21st Century, Osaka Prefecture University, Malaysia / Japan
  • Shamsul Izhar - Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia / Ecology Research Center, Research Organization for the 21st Century, Osaka Prefecture University, Malaysia / Japan
  • Eiichiro Nishio - Environment Research and Development Center, Environmental Protection Group, Sharp Corporation, Japan
  • Yasuhiko Utsumi - Environment Research and Development Center, Environmental Protection Group, Sharp Corporation, Japan
  • Nobuaki Kakimori - Environment Research and Development Center, Environmental Protection Group, Sharp Corporation, Japan
  • Salak Asghari Feridoun - Ecology Research Center, Research Organization for the 21st Century, Osaka Prefecture University, Japan

DOI 10.31025/2611-4135/2018.13738

Released under CC BY-NC-ND

Copyright: © 2018 CISA Publisher

Editorial History

  • Received: 12 Jul 2018
  • Revised: 19 Sep 2018
  • Accepted: 14 Nov 2018
  • Available online: 22 Nov 2018

Abstract

Tin and transparent glass substrate were efficiently recovered from color filter (CF) and thin-film transistor (TFT) glasses in LCD panel wastes using sub-critical water (sub-CW) at various treatment temperatures and reaction time. Treatment for 5 min using sub-CW added with NaOH resulted in a 95% recovery of tin from CF and TFT glasses. The tin oxide did not liquify in the liquid phase instead stayed in the organic multi-layers, which exfoliated together from the CF glass and TFT glass. This is a huge advantage because the organic multi-layers were readily separated by sub-CW and tin was recovered by filtration with ease. Transparent and clean glass was also recovered from LCD panel waste. The amount of tin oxide recovered depended on the sub-CW reaction temperature, reaction time and NaOH concentration. Treatment of smaller CF glass improved the recovery of tin. With this advance, we have showed that sub-CW method is technically feasible for tin oxide recovery in LCD waste.

Keywords


References

Alfantazi, A.M., Moskalyk, R.R., 2003. Processing of indium: A review. Miner. Eng. 16, 687-694

Fortes, M.C.B., Martins, A.H., Benedetto, J.S., 2003. Indium recovery from acidic aqueous solutions by solvent extraction with D2EHPA: A statistical approach to the experimental design. Braz. J. Chem. Eng. 20, 121–128

Gabriel, A.P., Giordani, B.B., Kasper, A., Veit, H.M., 2017. Indium Extraction From LCD Screens, in: 16th International Waste Management and Landfill Symposium. CISA Publisher, 2-6 October 2017, Sardinia, Italy

Gabriel, A.P., Giordani, B.B., Kasper, A., Veit, H.M., 2017. LCD Screens - Indium Leaching in: 16th International Waste Management and Landfill Symposium. CISA Publisher, 2–6 October 2017, Sardinia, Italy

Honma, T., Muratani, T., 2005. Material Collection from Liquid Crystal Display Wasted Panels. Sharp Technical Journal 92, 17–22

Hsieh, S.J., Chen, C.C., Say, W.C., 2009. Process for recovery of indium from ITO scraps and metallurgic microstructures. Mat. Sci. and Eng.: B 158, 82–87

Kulkarni, A.K., Daneshvarhosseini, S., Yoshida, H., 2011. Effective recovery of pure aluminum from waste composite laminates by sub- and super-critical water. J. Supercrit. Fluids 55, 992–997

Lee, J.H., Liu, D.N., Wu, S.T., 2008. Introduction to flat panel displays, in: A. Lowe, M. Kriss (Eds.), WID Series in Display Technology, Wiley, United Kingdom, 57−103

Li, J., Gao, S., Duan, H., Liu, L., 2009. Recovery of valuable materials from waste liquid crystal display panel. Waste Manag. 29, 2033–2039

Li, Y., Liu, Z., Li, Q., Liu, Z., Zeng, L., 2011. Recovery of indium from used indium–tin oxide (ITO) targets. Hydrometallurgy 105, 207–212

Park, K.S., Sato, W., Grause, G., Kameda, T., Yoshioka, T., 2009. Recovery of indium from In2O3 and liquid crystal display powder via a chloride volatilization process using polyvinyl chloride. Thermochimica Acta 493, 105–108

Ueberschaar, M., Schlummer, M., Jalalpoor, D., Kaup, N. and Rotter, V.S., 2017. Potential and Recycling Strategies for LCD Panelsfrom WEEE. Recycling 2, 7

Wolfgang, W., Kretzschmar, H.J. (2008). International Steam Tables: Properties of Water and Steam Based on the Industrial Formulation IAPWS-IF97. Berlin Heidelberg: Springer-Verlag

Yoshida, H., Izhar, S., Nishio, E., Utsumi, Y., Kakimori, N., Feridoun S.A., 2014. Recovery of indium from TFT and CF glasses in LCD panel wastes using sub-critical water. Sol. Energy Mater. Sol. Cells 125, 14–19

Yoshida, H., Izhar, S., Nishio, E., Utsumi, Y., Kakimori, N., Feridoun, S.A., 2015. Recovery of indium from TFT and CF glasses of LCD wastes using NaOH-enhanced sub-critical water. J. Supercrit. Fluids 104, 40–48


feb
23
sep
30