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

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...

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Bibliographic Details
Published in:Analytical Sciences 2018/05/10, Vol.34(5), pp.583-588
Main Authors: INABA, Kazuho, MURATA, Tomoyoshi, YAMAMURA, Shigeki, NAGANO, Masaaki, IWASAKI, Kazuhiro, NAKAJIMA, Daisuke, TAKIGAMI, Hidetaka
Format: Article
Language:English
Subjects:
acid rain
Aluminum
Analytical Chemistry
Antimony
Arsenic
Barium
Calcium
Cathode ray tubes
Chemistry
Circuit boards
Consumer electronics
Content test
Copper
Displays
dumped electronics
Electronic waste
Elution
elution test
Environmental risk
Flat panel displays
Heavy metals
Iron
Lead
long-term elution
Nickel
Printed circuit boards
Printed circuits
Shaking
Silicon
Strontium
Tin
Titanium
toxic elements
Video display terminals
Zinc
Zirconium
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Summary: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.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.17P558