Polychlorinated Biphenyl Emissions from Steelmaking Electric Arc Furnaces

Electric arc furnaces (EAFs) in steelmaking plants are a major source of dioxins. Preheating of steelmaking raw materials is widely used in EAFs to reduce energy consumption. Few studies have investigated emissions of dioxin-like polychlorinated biphenyls (PCBs) from EAFs, and the PCB emission level...

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Bibliographic Details
Published in:Bulletin of environmental contamination and toxicology 2021-04, Vol.106 (4), p.670-675
Main Authors: Shen, Jia, Yang, Lili, Yang, Qiuting, Zhao, Xiaoguang, Liu, Guorui, Zheng, Minghui
Format: Article
Language:English
Subjects:
Aquatic Pollution
Biphenyl
Dibenzofurans, Polychlorinated
Dioxins
Dioxins - analysis
Earth and Environmental Science
Ecotoxicology
Electric arc furnaces
Emission analysis
Emissions
Energy consumption
Environment
Environmental Chemistry
Environmental Health
Environmental Monitoring
Furnaces
Gases
Gases - analysis
Heating
Homology
PCB
Pollution
Polychlorinated biphenyls
Polychlorinated Biphenyls - analysis
Polychlorinated Dibenzodioxins - analysis
Raw materials
Soil Science & Conservation
Steel making
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Electric arc furnaces (EAFs) in steelmaking plants are a major source of dioxins. Preheating of steelmaking raw materials is widely used in EAFs to reduce energy consumption. Few studies have investigated emissions of dioxin-like polychlorinated biphenyls (PCBs) from EAFs, and the PCB emission levels and characteristics during preheating are unknown. In this study, PCB concentrations and distributions in stack gases emitted during EAF preheating were determined. The average dioxin-like PCB concentrations in stack gases emitted during preheating of three EAFs were 1236.1, 81,664.4, and 669.8 pg/Nm 3 , respectively. These values were greatly influenced by the composition of the steelmaking raw materials. The PCB profiles in all samples were dominated by less-chlorinated homologs. PCB emission factor for preheating in the EAFs is 0.58 µg WHO-TEQ/ton averagely, indicating significant emissions of PCBs from preheating process. The data will be useful for developing approaches for preventing and controlling PCB emissions from EAFs.
ISSN:0007-4861
1432-0800
DOI:10.1007/s00128-021-03105-x