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Determination of toxic metals in discarded Liquid Crystal Displays (LCDs)

Author

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  • Savvilotidou, Vasiliki
  • Hahladakis, John N.
  • Gidarakos, Evangelos

Abstract

This study focused on the determination of the toxic metal content of Liquid Crystal Displays (LCDs) present in various Waste Electrical and Electronic Equipment (WEEE). The main objective was the identification and quantification of toxic metals detected in LCD panels. An experimental procedure which involved dismantling, shredding, pulverization, digestion and chemical analysis was followed for the sorting, separation and analysis of LCD monitors from various electronic devices that are currently on the market. Nine selected devices were examined, originated from four different types of e-waste (WEEE); TVs, computers, mobile phones and tablets. Eleven metals were measured in all examined samples. In addition, concentration values of chromium (Cr), cadmium (Cd), lead (Pb) and mercury (Hg) were compared with the respective limits set by the RoHS 2002/95/EC Directive that was recently renewed by the 2012/19/EU recast. The comparison revealed that the examined toxic metals on LCD panels did not exceed the limits set by the European Union (EU). Furthermore, when results were compared to the TTLC regulatory limits it was revealed that in three samples As concentrations were higher than the limit. Finally, when the TCLP test was implemented the aforementioned samples did not exhibit proportionally elevated values in their leachates.

Suggested Citation

  • Savvilotidou, Vasiliki & Hahladakis, John N. & Gidarakos, Evangelos, 2014. "Determination of toxic metals in discarded Liquid Crystal Displays (LCDs)," Resources, Conservation & Recycling, Elsevier, vol. 92(C), pages 108-115.
    • Handle: RePEc:eee:recore:v:92:y:2014:i:c:p:108-115
    DOI: 10.1016/j.resconrec.2014.09.002
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    Cited by:

    1. Zhang, Kaihua & Wu, Yufeng & Wang, Wei & Li, Bin & Zhang, Yinan & Zuo, Tieyong, 2015. "Recycling indium from waste LCDs: A review," Resources, Conservation & Recycling, Elsevier, vol. 104(PA), pages 276-290.
    2. Bigum, M. & Damgaard, A. & Scheutz, C. & Christensen, T.H., 2017. "Environmental impacts and resource losses of incinerating misplaced household special wastes (WEEE, batteries, ink cartridges and cables)," Resources, Conservation & Recycling, Elsevier, vol. 122(C), pages 251-260.
    3. Moura, J.M.B.M. & Gohr Pinheiro, I. & Lischeski, D. & Valle, J.A.B., 2017. "Relation of Brazilian institutional users and technical assistances with electronics and their waste: What has changed?," Resources, Conservation & Recycling, Elsevier, vol. 127(C), pages 68-75.

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