期刊
ENVIRONMENTAL POLLUTION
卷 161, 期 -, 页码 185-191出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2011.10.033
关键词
Printed circuit board; PCDD/Fs; PBDD/Fs; Emission; Thermal processing
资金
- State Key Joint Laboratory of Environmental Simulation and Pollution Control [09Y04ESPCT]
- National Natural Science Foundation of China [20977056]
This study focuses primarily on the inventory of PCDD/Fs and PBDD/Fs associated with the low-temperature thermal processing of scrap printed circuit boards (PCBs). Twelve 2,3,7,8-substituted PBDD/Fs congeners were found in various sample outputs, with a total content of 60,000 ng TEQ/kg at 250 degrees C under air atmosphere. A rapid increase of PBDD/Fs was produced with 160,000 ng TEQ/kg, at 275 degrees C about twice that under the N-2 atmosphere. At 275 degrees C, the total contents of PCDD/Fs were only 170 and 770 ng TEQ/kg under an N-2 and air atmospheres respectively. The results reveal that a large contribution of PBDD/Fs emission may be expected from the dismantling or any other thermal processing of PCB scrap. PCDD/Fs, however, are formed and released into the environment in a variety of ways. Additional research is required to look for the causal factors that affect emissions. (C) 2011 Elsevier Ltd. All rights reserved.
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