Correcting the gas and particle partitioning of PCDD/F congeners in the flue gas of an iron ore sinter plant.
This study was aimed at developing an approach for correcting the gas and particle partitioning of PCDD/F congeners for samples collected from the flue gas of an iron ore sinter plant. An iron ore sinter plant equipped with an electrostatic precipitator (EP) and a selective catalytic reduction (SCR) was selected. Flue gas samples were collected at EP inlet, EP outlet and SCR outlet. Both particle- and gas-phase PCDD/Fs were analyzed for each collected sample. PCDD/F contents in EP ashes (EP(ash)) were also analyzed and used to correct the gas and particle partitioning of PCDD/F congeners of the collected flue gas samples. Results show that PCDD/Fs in the flue gas were dominated by the gas-phase. Before correction, the removal efficiencies for the gas- and particle-phase PCDD/Fs for EP were -58.1% and 64.3%, respectively, and SCR were 39.4% and 83.9%, respectively. The above results were conflict with the expected results for both EP and SCR indicating the need for correcting the gas and particle partitioning of PCDD/F congeners for all collected flue gas samples. After correction, the removal efficiencies become more reasonable for EP (=4.22% and 97.7%, respectively), and SCR (=54.7% and 62.0%, respectively). The above results confirm the effectiveness of the approach developed by this study.
Department of Environmental and Occupational Health, Medical College, National Cheng Kung University. 138, Sheng-Li Road, Tainan 704, Taiwan.
Yu-Chieh
YC
Kuo
Yu-Cheng
YC
Chen
Jeng-How
JH
Yang
Perng-Jy
PJ
Tsai
Lin-Chi
LC
Wang
Guo-Ping
GP
Chang-Chien
D001572:Benzofurans / Q000302:isolation & purification*; D005740:Gases / Q000737:chemistry*; D017745:Incineration; D007501:Iron / Q000737:chemistry*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000302:isolation & purification; D011108:Polymers / Q000302:isolation & purification*
D001572:Benzofurans; D005740:Gases; D000072317:Polychlorinated Dibenzodioxins; D011108:Polymers; C016068:polychlorodibenzofuran; D007501:Iron