연탄의 연소에 의한 다이옥신류 (PCDD/DFs and dioxin-like PCBs) 와 PAHs의 배출특성에 관한 연구

Abstract

This study was carried out for evaluation of concentration in briquet and ignition briquet for Dioxins, such as polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), dioxin like polychlorinated biphenyls (DLPCBs) and polycyclic aromatic hydrocarbons (PAHs) in briquet and ignition briquet. The content of dioxins and PAHs in the flue gas were determined. Sampling came into operation by 3 types(briquet, ignition briquet, briquet and ignition briquet), samples were analyzed for Dioxins using high resolution gas chromatography (HRGC) coupled to high resolution mass spectrometer (HRMS) and analyzed for PAHs using GC/MSD. The evaluation of PCDD/DFs calculated from the homologue sums were significantly higher for the briquet regarding their flue gas concentrations. PCDD/DFs and dioxin-like PCBs were detected in briquet samples from concentration of 0.963-4.889 ng WHO-TEQ/Nm3 and 0.103-0.277 ng WHO-TEQ/Nm3, respectively. The concentration of these compounds were predominantly TeCDF and the profile indicated the low chlorinated congener as being TeCDF as the most important contributor. The total PAHs (16-EPA) concentrations ranged 1.250-17.293 μg/m3 from briquet gas and 23.256-51.389 μg/m3 from ignition briquet gas. Total organic carbon (TOC) contents ranged from 69.19-78.68% for briquet and 46.79-73.31% ignition briquet. The Emissions Factors from briquet gas were 13.043 ng-TEQ/kg, PAHs 33.937 μg/kg, PAHcarcinogenesis(PAHcarc) 1.478 μg/kg, respectively. Emissions amounts of dioxins, PAHs and PAHcarc from briquet gas are estimated at 26.217 g WHO-TEQ/yr, 68.214 kg/yr, and 2.970 kg/yr, respectively as environmental release contribution levels. Consequently, this research will demonstrate that the evaluation of the homologue profiles and the isomer contribution indicates that the mechanism of the formation of PCDD/DFs in the flue gas is similar for both coal sorts. In this quantitative results, an assessment of briquet domestic heating as a source of PCDD/DFs is identified in this study.