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Composition and Elution Behavior of Various Elements from Printed Circuit Boards, Cathode-ray Tube Glass, and Liquid-crystal Displays in Waste Consumer Electronics

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Abstract

The contents and elution behavior of metals in consumer electronics parts were determined so as to understand their maximum environmental risk. Elements contained most in printed-circuit boards were Cu, Si, Br, Ca, Al, Sn, Pb, Sb, Ba, Fe, Ni, Ti, and Zn; in cathode-ray tube glass were Si, Pb, Ba, Sr, Zn, Zr, Ca, and Sb; in arsenic contained liquid-crystal displays were Si, Ca, Sr, Ba, As, and Fe; and in antimony contained liquid-crystal displays were Si, Ba, Ca, Sb, Sr, Fe, and Sn. The elements eluted most from printed-circuit boards were Zn, Pb, and Cu; from cathode-ray tube glass were Pb, Zn, B, Ba, and Si; and from liquid-crystal displays were B and Si, and the toxic As and Sb. The amount eluted was greatest at acidic pH. It was revealed that officially recommended 6-h-shaking with a pure water test was insufficient to understand the real environmental risk of waste electronics.

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Acknowledgments

The authors thank the Analysis & Material Division, JFE Techno-Research Corp., for their collaboration on the contents test and local analysis of LCDs. Part of the study was supported by National Institute for Environmental Studies Interdisciplinary Research Funding 2011-2013.

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Authors and Affiliations

  1. Department of Environmental Science, Azabu University, 1-17-71 Fuchinobe, Chuo, Sagamihara, Kanagawa, 252-5201, Japan

    Kazuho Inaba

  2. National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan

    Tomoyoshi Murata, Shigeki Yamamura, Kazuhiro Iwasaki, Daisuke Nakajima & Hidetaka Takigami

  3. National Institute for Minamata Disease, 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan

    Masaaki Nagano

Authors
  1. Kazuho Inaba
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  2. Tomoyoshi Murata
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  3. Shigeki Yamamura
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  4. Masaaki Nagano
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  5. Kazuhiro Iwasaki
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  6. Daisuke Nakajima
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  7. Hidetaka Takigami
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Correspondence to Kazuho Inaba.

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Inaba, K., Murata, T., Yamamura, S. et al. Composition and Elution Behavior of Various Elements from Printed Circuit Boards, Cathode-ray Tube Glass, and Liquid-crystal Displays in Waste Consumer Electronics. ANAL. SCI. 34, 583–588 (2018). https://doi.org/10.2116/analsci.17P558

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  • DOI: https://doi.org/10.2116/analsci.17P558

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