Characterizing the emission of chlorinated/brominated dibenzo-p-dioxins and furans from low-temperature thermal processing of waste printed circuit board.
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°C under air atmosphere. A rapid increase of PBDD/Fs was produced with 160,000 ng TEQ/kg, at 275°C-about twice that under the N(2) atmosphere. At 275°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.
School of Environment, Tsinghua University, Beijing 100084, China. duanhuabo@gmail.com
Huabo
H
Duan
Jinhui
J
Li
Yicheng
Y
Liu
Norimasa
N
Yamazaki
Wei
W
Jiang
D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D001572:Benzofurans / Q000032:analysis* / Q000737:chemistry; D004147:Dioxins / Q000032:analysis* / Q000737:chemistry; D059029:Electronic Waste; D006842:Hydrocarbons, Brominated / Q000032:analysis* / Q000737:chemistry; D017745:Incineration
D000393:Air Pollutants; D001572:Benzofurans; D004147:Dioxins; D006842:Hydrocarbons, Brominated; C020887:dibenzo(1,4)dioxin