| Summary: | 碩士 === 國立成功大學 === 環境工程學系碩博士班 === 98 === This study examined the characteristics of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in emissions, ambient air? leaves and soil at the Y city. The following PCDD/Fs emmision sources were investigated: two small-scale industrial waste incinerator (IWIs); one medical waste incinerator (MWI); four sinter planes (SINTERs); five electric furnaces (EAFs); one secondary aluminum smelter (ALS); one secondary zinc smelter (ZN); one cement kiln (CEM); and, one crematorium (CRE). The emission factors of PCDD/Fs in the stack flue gases were determined? and the overall emission quantity of PCDD/Fs from the Y city was estimated. Finally, the influence of these emission sources on the surrounding environment was assessed. The mean PCDD/F concentrations in the stack flue gases were as follows: IWIs, 0.0299ng I-TEQ/Nm3; MWI, 0.202ng I-TEQ/Nm3; EAFs, 0.238ng I-TEQ/Nm3; SINTERs, 0.311ng I-TEQ/Nm3; CEM, 0.0207ng I-TEQ/Nm3; ALSs, 0.0868ng I-TEQ/Nm3; CRE 0.251ng I-TEQ/Nm3; and, ZN 0.0118ng I-TEQ/Nm3. The estimated total annual emission of PCDD/Fs from these emission sources in the industrial zone was 13.4 g I-TEQ/yr (large-scale MSWIs, 0.86%; small-scale MSWIs, 0.0026%; industrial waste incinerators, 0.077%; medical waste incinerators, 0.017%; electric furnaces, 60.8%; sinter planes, 37.0%; coke oven planes, 0.35%; cement kilns, 0.048%; secondary aluminum smelters, 0.62%; secondary zinc smelters, 0.019%; secondary copper smelters, 0.090%; Crematorium,0.28%). The PCDD/F emissions from metallurgical processes were dominant, and comprised 98.9% of the total PCDD/F annual emissions.
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