skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Leaching of indium from obsolete liquid crystal displays: Comparing grinding with electrical disintegration in context of LCA

Abstract

Highlights: Black-Right-Pointing-Pointer Two pre-treatment methods, prior to leaching of indium from obsolete LCD modules, were described. Black-Right-Pointing-Pointer Conventional grinding and electrical disintegration have been evaluated and compared in the context of LCA. Black-Right-Pointing-Pointer Experimental data on the leaching capacity for indium and the electricity consumption of equipment were inputted into the LCA model in order to compare the environmental performance of each method. Black-Right-Pointing-Pointer An estimate for the environmental performance was calculated as the sum of six impact categories. Black-Right-Pointing-Pointer Electrical disintegration method outperforms conventional grinding in all impact categories. - Abstract: In order to develop an effective recycling system for obsolete Liquid Crystal Displays (LCDs), which would enable both the leaching of indium (In) and the recovery of a pure glass fraction for recycling, an effective liberation or size-reduction method would be an important pre-treatment step. Therefore, in this study, two different types of liberation methods: (1) conventional grinding, and (2) electrical disintegration have been tested and evaluated in the context of Life Cycle Assessment (LCA). In other words, the above-mentioned methods were compared in order to find out the one that ensures the highest leaching capacity for indium, as well as the lowest environmental burden. One of themore » main findings of this study was that the electrical disintegration was the most effective liberation method, since it fully liberated the indium containing-layer, ensuring a leaching capacity of 968.5 mg-In/kg-LCD. In turn, the estimate for the environmental burden was approximately five times smaller when compared with the conventional grinding.« less

Authors:
 [1]; ; ; ;  [1]
  1. Department of System Innovation, Graduate School of Engineering, University of Tokyo (Japan)
Publication Date:
OSTI Identifier:
22086561
Resource Type:
Journal Article
Journal Name:
Waste Management
Additional Journal Information:
Journal Volume: 32; Journal Issue: 10; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0956-053X
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ENERGY CONSUMPTION; ENVIRONMENTAL EFFECTS; EXPERIMENTAL DATA; GLASS; GRINDING; INDIUM; LEACHING; LIFE CYCLE ASSESSMENT; LIQUID CRYSTALS; RECYCLING

Citation Formats

Dodbiba, Gjergj, Nagai, Hiroki, Lipang, Wang, Okaya, Katsunori, and Fujita, Toyohisa. Leaching of indium from obsolete liquid crystal displays: Comparing grinding with electrical disintegration in context of LCA. United States: N. p., 2012. Web. doi:10.1016/J.WASMAN.2012.05.016.
Dodbiba, Gjergj, Nagai, Hiroki, Lipang, Wang, Okaya, Katsunori, & Fujita, Toyohisa. Leaching of indium from obsolete liquid crystal displays: Comparing grinding with electrical disintegration in context of LCA. United States. https://doi.org/10.1016/J.WASMAN.2012.05.016
Dodbiba, Gjergj, Nagai, Hiroki, Lipang, Wang, Okaya, Katsunori, and Fujita, Toyohisa. 2012. "Leaching of indium from obsolete liquid crystal displays: Comparing grinding with electrical disintegration in context of LCA". United States. https://doi.org/10.1016/J.WASMAN.2012.05.016.
@article{osti_22086561,
title = {Leaching of indium from obsolete liquid crystal displays: Comparing grinding with electrical disintegration in context of LCA},
author = {Dodbiba, Gjergj and Nagai, Hiroki and Lipang, Wang and Okaya, Katsunori and Fujita, Toyohisa},
abstractNote = {Highlights: Black-Right-Pointing-Pointer Two pre-treatment methods, prior to leaching of indium from obsolete LCD modules, were described. Black-Right-Pointing-Pointer Conventional grinding and electrical disintegration have been evaluated and compared in the context of LCA. Black-Right-Pointing-Pointer Experimental data on the leaching capacity for indium and the electricity consumption of equipment were inputted into the LCA model in order to compare the environmental performance of each method. Black-Right-Pointing-Pointer An estimate for the environmental performance was calculated as the sum of six impact categories. Black-Right-Pointing-Pointer Electrical disintegration method outperforms conventional grinding in all impact categories. - Abstract: In order to develop an effective recycling system for obsolete Liquid Crystal Displays (LCDs), which would enable both the leaching of indium (In) and the recovery of a pure glass fraction for recycling, an effective liberation or size-reduction method would be an important pre-treatment step. Therefore, in this study, two different types of liberation methods: (1) conventional grinding, and (2) electrical disintegration have been tested and evaluated in the context of Life Cycle Assessment (LCA). In other words, the above-mentioned methods were compared in order to find out the one that ensures the highest leaching capacity for indium, as well as the lowest environmental burden. One of the main findings of this study was that the electrical disintegration was the most effective liberation method, since it fully liberated the indium containing-layer, ensuring a leaching capacity of 968.5 mg-In/kg-LCD. In turn, the estimate for the environmental burden was approximately five times smaller when compared with the conventional grinding.},
doi = {10.1016/J.WASMAN.2012.05.016},
url = {https://www.osti.gov/biblio/22086561}, journal = {Waste Management},
issn = {0956-053X},
number = 10,
volume = 32,
place = {United States},
year = {2012},
month = {10}
}