Toxic footprint and materials profile of electronic components in printed circuit boards

Bibliographische Detailangaben
Veröffentlicht in:	Waste management (New York, N.Y.). - 1999. - 141(2022) vom: 15. März, Seite 154-162
1. Verfasser:	Huang, Jinfeng (VerfasserIn)
Weitere Verfasser:	Deng, Yi, Han, Yunhui, Shu, Jiancheng, Wang, Rong, Huang, Sheng, Ogunseitan, Oladele A, Yu, Keli, Shang, Min, Liu, Yi, Li, Shuyuan, Han, Yubin, Cheng, Zhiqiang, Chen, Mengjun
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2022
Zugriff auf das übergeordnete Werk:	Waste management (New York, N.Y.)
Schlagworte:	Journal Article E-waste Electronic components Leaching Assessment Printed Circuit Boards Regulatory Policy Toxic Footprint

Beschreibung
Zusammenfassung:	Copyright © 2022 Elsevier Ltd. All rights reserved. Waste printed circuit boards (WPCBs) contain valuable material resources and hazardous substances, thereby posing a challenge for sustainable resource recovery and environmental protection initiatives. Overcoming this challenge will require mapping the toxic footprint of WPCBs to specific materials and substances used in manufacturing electronic components (ECs). Therefore, this work collected 50 EC specimens from WPCBs in five ubiquitous consumer products, such as television, refrigerator, air conditioner, washing machine and computer. The work extracted and analyzed metal contents and used leachability assessments based on tests adopted by the regulatory policies from China and the United States. The work found that copper and iron are the most abundant constituents in ECs, with concentrations ranging 5.90-796.62 g/kg and 0-831.53 g/kg, respectively; whereas abundance of precious metal content is in the order of silver > gold > palladium > platinum, with silver concentration ranging 15-5290 mg/kg. The content of marginally-regulated toxic substance arsenic ranged 0-9700 mg/kg; whereas fully regulated toxic metals such as chromium, lead and mercury did not exceed the thresholds set by China and US standards. The work found new toxic threats from arsenic and selenium leached from 20 of 50 ECs exceeding regulatory standards. These results will aid manufacturers and recyclers in protecting workers' health and environmental quality from arsenic and selenium pollution, and should initiate discussion about regulating these toxic components as part of a comprehensive program to reduce the toxic footprint of electronic products
Beschreibung:	Date Revised 19.10.2023 published: Print-Electronic Citation Status Publisher
ISSN:	1879-2456
DOI:	10.1016/j.wasman.2022.01.019