Recycling of waste glass generated from end-of-life LCD devices: A feasibility study using simulated waste glass.
In: Journal of Cleaner Production, Jg. 227 (2019-08-01), S. 199-206
academicJournal
Zugriff:
The liquid crystal display (LCD) industry has undergone drastic growth over the past decade. Considering that the lifetime of an LCD device is approximately ten years, a huge end LCD waste glass (ELWG) is being produced from end-of-life LCD devices. The recycling of ELWG derived from LCD device produced before 2011 is limited by the presence of toxic components such as As, Sb and Ba. In this work, the potential of recycling ELWG was examined to be used in the glass wool industry. 17 glass batches using four different simulated ELWGs (mixtures corresponding to LCD glasses produced in 2006, 2008, 2009, and 2010) were prepared and melted. ELWG was introduced up to 20% of the total glass. Two fixed viscosity points (T m , T w) corresponding to 102 and 103 dPas, and the liquidus temperature (T L) were determined in the melt state, and leaching tests of the glass powder in an acidic solution based on the toxicity characteristic leaching procedure (TCLP) were also carried out. As the ELWG content was increased, the T m , T w , and T L values did not show a linear relationship with the ELWG content, but some fluctuation in the values was observed. The T m value showed a larger deviation of 28–36 °C from that of the original glass than the T w (6–14 °C) and T L (2–16 °C) values. As and Sb were not detected in the leaching tests, and the Ba concentration (1.232–2.279 mg/L) was much lower than the TCLP regulatory level (100 mg/L). The observed T W -T L values suggested that the replacement of 20% or more of the total glass by ELWG is possible. Additionally, the economic and environmental effects of the recycling process were discussed. Image 1 • Recycling of end LCD waste glasses (ELWG) in glass wool was examined. • Source of B 2 O 3 such as penta-borax was replaced by ELWG. • Introduction of ELWG had very little influence on the fibreizing condition. • In extraction fluid As and Sb were not detected and Ba concentration was very low. • Replacement of more than 20% of the glass wool by ELWG was suggested. [ABSTRACT FROM AUTHOR]
Titel: |
Recycling of waste glass generated from end-of-life LCD devices: A feasibility study using simulated waste glass.
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Autor/in / Beteiligte Person: | Kim, Kicheol ; Kim, Kidong |
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Zeitschrift: | Journal of Cleaner Production, Jg. 227 (2019-08-01), S. 199-206 |
Veröffentlichung: | 2019 |
Medientyp: | academicJournal |
ISSN: | 0959-6526 (print) |
DOI: | 10.1016/j.jclepro.2019.04.200 |
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