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题名: Mono- to Octachlorinated Polychlorinated Dibenzo-p-dioxin and Dibenzofuran Emissions from Sintering Plants Synergistically Controlled by the Desulfurization Process
作者: Wang, Mengjing; Liu, Wenbin; Hou, Meifang; Li, Qianqian; Han, Ying; Li, Haifeng; Yan, Nan; Zheng, Minghui
刊名: ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期: 2016-05-17
卷号: 50, 期号:10, 页码:5207-5215
DOI: 10.1021/acs.est.5b06095
部门归属: 环境化学与生态毒理学国家重点实验室
英文摘要: The influence of desulfurization systems in sintering plants on polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) concentrations, profiles, and emission factors was studied. Mono- to tri-CDD/Fs and tetra- to octa-CDD/F concentrations were 4.4 +/- 2.3 and 10.5 +/- 8.3 ng m(-3), respectively, at the inlets and 0.87 +/- 0.48 and 0:47 +/- 0.22 ng m(-3); respectively, after desulfurization. The toxic equivalents (TEQs) were 0.95 +/- 0.093 and 0.51 +/- 0.040 ng of I-TEQ m(-3) at the inlets and after desulfurization, respectively. The congener profiles and homologue distributions were dominated by 2-MoCDF and MoCDF, respectively. The PCDD/F removal efficiencies achieved by desulfurization increased as the chlorination level increased. The PCDD/Fs became adsorbed to gypsum. Annual mono- to tri-CDD/Fs PCDD/F and TEQ (tetra- to octa-CDD/F) emission factors for flue gas and gypsum between 2003 and 2012 were determined. The total amounts of mono- tortri-CDD/Fs emitted in flue gas and gypsum between 2003 and 2012 were 10.7 and 10.2 kg, respectively. The total TEQs emitted in flue gas and gypsum between 2003 and 2012 were estimated to be 15486 and 1878 g of I-TEQ, respectively. PCDD/Fs adsorbed to gypsum are not effectively eliminated. The PCDD/F concentrations increased as the fly ash surface area increased moving through the electrostatic precipitator stages.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35902
Appears in Collections:环境化学与生态毒理学国家重点实验室_期刊论文

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