One electric arc furnace (EAF), one secondary aluminum smelter (ALS), one crematory and two joss paper furnaces in Tainan County were investigated for their emission of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polybrominateddiphenyl ethers (PBDEs). The results are as follows. 1. PCDD/F concentrations in the stack flue gases of the EAF and secondaryALS were 0.0413 and 0.221ng I-TEQ/Nm3, respectively. Their corresponding emission factors were 0.416 and 3.50 μg I-TEQ/ton-feedstock. 2. PCDD/F concentrations in the stack flue gases of the crematory and the two joss paper furnaces were0.139、0.703and 0.00681ng I-TEQ/Nm3, respectively.Their corresponding emission factors were3.83μg I-TEQ/body, and 0.166、0.00827 μg I-TEQ/kg. The joss paper furnace with one wet scrubber as air pollution control device possessed a much lower emission factor (0.00827 μg I-TEQ/kg). 3.PBDE concentrations in the stack flue gases of the EAF and secondary ALS were 35.8, 52.3 and 45.0 ng/Nm3, respectively.Their corresponding emission factors were 43.7 and 551μg I-TEQ/ton-feedstock. 4. PBDE concentrations in the stack flue gases of the crematory and the two joss paper furnaces were 0.139、0.703and 0.00681ng I-TEQ/Nm3, respectively. Their corresponding emission factors were 1000 μg/body, 12.2 and 54.2 μg/kg. 5. Annual PCDD/F emission quantities from secondary ALS, EAF, crematory and the joss paper furnaces were 0.323、0.396、0.0237 and 2.26 g I-TEQ/yr, respectively. 6. Annual PBDE emission quantities from secondary ALS, EAF, crematory and the joss paper furnaces were 70.5、524、7.24及188.7 g/yr, respectively.

PCDD/Fs; Flue gas, Emission factor, Fly ash, Indicatory congeners