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题名: Removal of polychlorinated biphenyls by desulfurization and emissions of polychlorinated biphenyls from sintering plants
作者: Wang, Mengjing; Hou, Meifang; Zhao, Kai; Li, Haifeng; Han, Ying; Liao, Xiao; Chen, Xuebin; Liu, Wenbin
刊名: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
出版日期: 2016-04
卷号: 23, 期号:8, 页码:7369-7375
关键词: Polychlorinated biphenyls ; Desulfurization ; Removal ; Gypsum ; Fly ash ; Emission factor
DOI: 10.1007/s11356-015-5903-7
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 on polychlorinated biphenyls (PCBs) from sintering plants was investigated. The concentrations of dioxin-like (dl) PCBs, toxic equivalents (TEQs), indicator PCBs, and total tri- to deca-chlorinated PCB homolog groups (aPCBs) in the flue gases at the desulfurization system inlets were 290-1906 pg m(-3) (2.4-18.8 pg World Health Organization (WHO) TEQ m(-3)), 420-2885 pg m(-3), and 6496-22,648 pg m(-3), respectively. Desulfurization reduced the values to 43.3-500 pg m(-3) (0.46-9.5 pg WHO-TEQ m(-3)), 183-587 pg m(-3), and 2383-11,639 pg m(-3), respectively. The removed PCBs were adsorbed by gypsum from the flue gas; the PCB concentration distributions at the inlets and outlets and in the gypsum samples were similar. The emission factors were 9.86 ng WHO-TEQ t(-1) for the flue gas and 8.37 ng WHO-TEQ t(-1) for gypsum. Desulfurization decreased the annual atmospheric PCB emissions from 48.6 to 30.7 g WHO-TEQ, and the estimated annual emissions in gypsum were 8.06 g WHO-TEQ. PCBs in the gypsum have not been effectively eliminated and will probably reenter the environment and in turn become a new source of PCB emission. The PCB concentrations in fly ashes from series-connected electrostatic precipitators clearly increased.
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/311016/35932
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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