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题名: Variations and factors that influence the formation of polychlorinated naphthalenes in cement kilns co-processing solid waste
作者: Jin, Rong; Zhan, Jiayu; Liu, Guorui; Zhao, Yuyang; Zheng, Minghui
刊名: JOURNAL OF HAZARDOUS MATERIALS
出版日期: 2016-09-05
卷号: 315, 期号:0, 页码:117-125
关键词: Cement kiln ; Solid waste ; Polychlorinated naphthalenes ; Destruction efficiency ; Influencing factors
DOI: 10.1016/j.jhazmat.2016.05.003
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: Pilot studies of unintentionally produced pollutants should be performed before waste being co-processed in cement kilns. Polychlorinated naphthalene (PCN) formation and emission from cement kilns co-processing sorted municipal solid waste, sewage sludge, and waste acid, however, have not previously been studied. Here, PCNs were analyzed in stack gas samples and solid samples from different stages of three cement production runs. PCN destruction efficiencies were higher when waste was co-processed (93.1% and 88.7% in two tests) than when waste was not co-processed (39.1%), so co-processing waste would not increase PCN outputs. The PCN concentrations were higher in particle samples from the Cl preheater and stages at back end of kiln than in particle samples from other stages, suggesting that cyclone preheater and back end of kiln should be focused for controlling PCN emissions. Besides that, based on the variation of PCN concentrations and corresponding operating conditions in different stages, the temperature, feeding materials, and chlorine content were suggested as the main factors influencing PCN formation. The PCN homologue and congener profiles suggested chlorination and dechlorination were the main PCN formation and decomposition pathways, and congeners CN-23, CN-46, and CN-59 appear to be appropriate indicators of PCNs emitted from coal-burning sources. (C) 2016 Elsevier B.V. All rights reserved.
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/311016/35982
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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