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Emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans from stack gases of electric arc furnaces and secondary aluminum smelters.
J Air Waste Manag Assoc. 2005 Feb; 55(2):219-26.JA

Abstract

This study investigates the emissions of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) from four electric arc furnaces (EAFs) and eight secondary aluminum smelters (secondary ALSs) in Taiwan. The mean PCDD/F International-Toxicity Equivalents (I-TEQ) concentrations in the stack gases of these EAFs and secondary ALSs are 0.28 ng I-TEQ/Nm3 (relative standard deviation [RSD]= 100%) and 3.3 ng I-TEQ/Nm3 (RSD = 260%), respectively. The high RSDs, especially for those obtained from secondary ALSs, could be caused by the intrinsic differences in their involved feeding materials, furnace operating conditions, and air pollution control devices. The mean I-TEQ emission factor of PCDD/Fs for EAFs (1.8 microg I-TEQ/tonne-feedstock) is lower than that for secondary ALSs (37 microg I-TEQ/tonne-feedstock). This result might be because the involved furnace temperatures for secondary ALSs (650-750 degrees C) are lower than those for EAFs (1600-1700 degrees C), resulting in the deterioration of the combustion condition, leading to the formation of PCDD/Fs during the industrial process. This study found that the total PCDD/F emissions from EAFs (20 g I-TEQ/yr) and secondary ALSs (18 g I-TEQ/yr) are approximately 27, 53, and approximately 24, 49 times higher than those from municipal solid waste incinerators (MSWIs; 0.74 g I-TEQ/yr) and medical waste incinerators (MWIs; 0.37 g I-TEQ/yr), respectively; while those are 44 and 40% of total PCDD/F emission from sinter plants (45 g I-TEQ/ yr), respectively. Considering a more stringent emission limit has been applied to waste incinerators (0.1 ng I-TEQ/Nm3) in Taiwan lately, the results suggest that the control of the emissions from metallurgical processes has become the most important issue for reducing the total PCDD/F emission from industrial sectors to the ambient environment.

Authors+Show Affiliations

Department of Chemical Engineering, Cheng Shiu University, Kaohsiung, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15796112

Citation

Lee, Wei-Shan, et al. "Emissions of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans From Stack Gases of Electric Arc Furnaces and Secondary Aluminum Smelters." Journal of the Air & Waste Management Association (1995), vol. 55, no. 2, 2005, pp. 219-26.
Lee WS, Chang-Chien GP, Wang LC, et al. Emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans from stack gases of electric arc furnaces and secondary aluminum smelters. J Air Waste Manag Assoc. 2005;55(2):219-26.
Lee, W. S., Chang-Chien, G. P., Wang, L. C., Lee, W. J., Wu, K. Y., & Tsai, P. J. (2005). Emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans from stack gases of electric arc furnaces and secondary aluminum smelters. Journal of the Air & Waste Management Association (1995), 55(2), 219-26.
Lee WS, et al. Emissions of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans From Stack Gases of Electric Arc Furnaces and Secondary Aluminum Smelters. J Air Waste Manag Assoc. 2005;55(2):219-26. PubMed PMID: 15796112.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans from stack gases of electric arc furnaces and secondary aluminum smelters. AU - Lee,Wei-Shan, AU - Chang-Chien,Guo-Ping, AU - Wang,Lin-Chi, AU - Lee,Wen-Jhy, AU - Wu,Kuen-Yuh, AU - Tsai,Perng-Jy, PY - 2005/3/31/pubmed PY - 2005/4/13/medline PY - 2005/3/31/entrez SP - 219 EP - 26 JF - Journal of the Air & Waste Management Association (1995) JO - J Air Waste Manag Assoc VL - 55 IS - 2 N2 - This study investigates the emissions of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) from four electric arc furnaces (EAFs) and eight secondary aluminum smelters (secondary ALSs) in Taiwan. The mean PCDD/F International-Toxicity Equivalents (I-TEQ) concentrations in the stack gases of these EAFs and secondary ALSs are 0.28 ng I-TEQ/Nm3 (relative standard deviation [RSD]= 100%) and 3.3 ng I-TEQ/Nm3 (RSD = 260%), respectively. The high RSDs, especially for those obtained from secondary ALSs, could be caused by the intrinsic differences in their involved feeding materials, furnace operating conditions, and air pollution control devices. The mean I-TEQ emission factor of PCDD/Fs for EAFs (1.8 microg I-TEQ/tonne-feedstock) is lower than that for secondary ALSs (37 microg I-TEQ/tonne-feedstock). This result might be because the involved furnace temperatures for secondary ALSs (650-750 degrees C) are lower than those for EAFs (1600-1700 degrees C), resulting in the deterioration of the combustion condition, leading to the formation of PCDD/Fs during the industrial process. This study found that the total PCDD/F emissions from EAFs (20 g I-TEQ/yr) and secondary ALSs (18 g I-TEQ/yr) are approximately 27, 53, and approximately 24, 49 times higher than those from municipal solid waste incinerators (MSWIs; 0.74 g I-TEQ/yr) and medical waste incinerators (MWIs; 0.37 g I-TEQ/yr), respectively; while those are 44 and 40% of total PCDD/F emission from sinter plants (45 g I-TEQ/ yr), respectively. Considering a more stringent emission limit has been applied to waste incinerators (0.1 ng I-TEQ/Nm3) in Taiwan lately, the results suggest that the control of the emissions from metallurgical processes has become the most important issue for reducing the total PCDD/F emission from industrial sectors to the ambient environment. SN - 1096-2247 UR - https://www.unboundmedicine.com/medline/citation/15796112/Emissions_of_polychlorinated_dibenzo_p_dioxins_and_dibenzofurans_from_stack_gases_of_electric_arc_furnaces_and_secondary_aluminum_smelters_ L2 - https://www.tandfonline.com/doi/full/10.1080/10473289.2005.10464613 DB - PRIME DP - Unbound Medicine ER -