Removal of PCDD/Fs from flue gas by a fixed-bed activated carbon filter in a hazardous waste incinerator.
The adsorption of polychlorinated dibenzodioxins and dibenzofurans (PCDD/Fs) by activated carbon (AC) was examined in a fixed-bed AC unit in a hazardous waste incinerator (IZAYDAS) in Turkey. Results showed that the removal efficiencies of PCDD/Fs decrease as the chlorination level increases, which was explained by the difference in gas/particle partitioning of the compounds. Since dioxins are tightly adsorbed by activated carbon, other flue gas constituents showed no clear effect on the dioxin removal. Adsorption kinetics indicated that the adsorption of volatile congeners and homologues fits well with Henry's law, possibly due to the higher gaseous fractions, while the correlation was lower for lowly volatile ones. PCDD/F congeners and homologues had a concentration value up to which no adsorption occurred, which could be attributed to the insufficient contact times at the low concentrations.
Department of Environmental Engineering, University of Kocaeli, 41100 Kocaeli, Turkey. aykan@kou.edu.tr
Aykan
A
Karademir
Mithat
M
Bakoglu
Fatih
F
Taspinar
Savas
S
Ayberk
D000392:Air Movements; D000393:Air Pollutants / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D001572:Benzofurans / Q000302:isolation & purification*; D002244:Carbon; D000072338:Dibenzofurans, Polychlorinated; D005374:Filtration; D005740:Gases; D006256:Hazardous Waste; D017745:Incineration; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000302:isolation & purification*; D012037:Refuse Disposal / Q000379:methods*; D012989:Soil Pollutants / Q000302:isolation & purification*
D000393:Air Pollutants; D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D005740:Gases; D006256:Hazardous Waste; D000072317:Polychlorinated Dibenzodioxins; D012989:Soil Pollutants; D002244:Carbon