Human health and ecological toxicity potentials due to heavy metal content in waste electronic devices with flat panel displays
Human health and ecological toxicity potentials due to heavy metal content in waste electronic devices with flat panel displays
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DOI：
10.1016/j.jhazmat.2009.12.025
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发表时间：
2010-05-15
影响因子：
13.6
通讯作者：
Schoenung, Julie M.
中科院分区：
文献类型：
--
作者：
Lim, Seong-Rin;Schoenung, Julie M.
已知阴极射线管 (CRT) 电视和电脑显示器等显示设备含有有毒物质，因此在加利福尼亚州和其他地方禁止在垃圾填埋场进行处置。目前每年购买的新型平板显示 (FPD) 设备数以百万计，也含有有毒物质，但此前尚未对其进行系统研究和比较，以评估其最终处置可能产生的潜在影响。目前的工作重点是评估选定 FPD 设备中重金属含量的报废潜在毒性，旨在为材料选择和环境设计 (DfE) 决策提供信息。具体来说，考虑了等离子电视、LCD（液晶显示器）电视、液晶电脑显示器和笔记本电脑中的金属锑、砷、钡、铍、镉、铬、钴、铜、铅、汞、钼、镍、硒、银、钒和锌。通过结合各自重金属含量的数据、美国 EPA 化学品和其他环境影响减少和评估工具 (TRACI) 中的特征因素以及路径和影响模型，从生命周期评估的角度评估人类健康和生态毒性潜力。潜在毒性的主要贡献者是铅、砷、铜和汞。尽管新型平板显示设备中的重金属含量对人类健康的潜在毒性比 CRT 低，但就生态毒性而言，新设备更严重，特别是液晶电视中的汞和等离子电视中的铜。 (C) 2009 Elsevier B.V. 保留所有权利。
Display devices such as cathode-ray tube (CRT) televisions and computer monitors are known to contain toxic substances and have consequently been banned from disposal in landfills in the State of California and elsewhere. New types of flat panel display (FPD) devices, millions of which are now purchased each year, also contain toxic substances, but have not previously been systematically studied and compared to assess the potential impact that could result from their ultimate disposal. In the current work, the focus is on the evaluation of end-of-life toxicity potential from the heavy metal content in select FPD devices with the intent to inform material selection and design-for-environment (DfE) decisions. Specifically, the metals antimony, arsenic, barium, beryllium, cadmium, chromium, cobalt, copper, lead, mercury, molybdenum, nickel, selenium, silver, vanadium, and zinc in plasma TVs, LCD (liquid crystal display) TVs, LCD computer monitors and laptop computers are considered. The human health and ecotoxicity potentials are evaluated through a life cycle assessment perspective by combining data on the respective heavy metal contents, the characterization factors in the U.S. EPA Tool for the Reduction and Assessment of Chemical and other environmental Impacts (TRACI), and a pathway and impact model. Principal contributors to the toxicity potentials are lead, arsenic, copper, and mercury. Although the heavy metal content in newer flat panel display devices creates less human health toxicity potential than that in CRTs, for ecological toxicity, the new devices are worse, especially because of the mercury in LCD TVs and the copper in plasma TVs. (C) 2009 Elsevier B.V. All rights reserved.