Thermochemical formation of polychlorinated dibenzo-p-dioxins and dibenzofurans on the fly ash matrix from metal smelting sources
文献类型：期刊论文
| 作者 | Zheng, Minghui; Zhao, Yuyang; Yang, Hongbo; Yang, Lili; Wu, Xiaolin; Jin, Rong ; Xu, Yang; Xiao, Ke; Liu, Wenbin; Liu, Guorui
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| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2018 |
| 卷号 | 191页码:825-831 |
| 关键词 | PCDD/Fs Persistent organic pollutants Fly ash Secondary aluminum smelting Secondary lead smelting Sintering |
| ISSN号 | 0045-6535 |
| 文献子类 | Article |
| 英文摘要 | Metal smelting processes are important sources of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). The present work aims to clarify the formation characteristics of PCDD/Fs by heterogeneous mechanisms on fly ash from typical multiple secondary aluminum (SAl), secondary lead (SPb) smelting, and iron ore sintering (SNT) sources in China. The formation characteristics of PCDD/Fs on fly ash were studied in the temperature range 250-450 degrees C for 10-150 min. Substantial thermochemical formation of PCDD/Fs on SAl and SNT ash was observed. The maximum increase of PCDD/F concentrations under 350 degrees C for 30 min was 604 times greater than the initial concentration in SAI ash. The concentration of PCDD/Fs was 77 times greater than that of SNT fly ash under 350 degrees C for 30 min. However, the maximum increase of PCDD/F concentrations was less than 8 times that in raw SPb ash under 350 degrees C. Contents of total organic carbon (TOC), Cu, Al, Zn and Cl, which are widely recognized as important elements for promoting PCDD/F formation, were obviously higher in SAl and SNT ash than in SPb ash. This may explain the greater observed formation times of PCDD/Fs on SAl and SNT ash than that on SPb ash. It was found that several congeners tended to form at higher temperatures than those for SAl ash. Activation energy calculation according to the Arrhenius equations could explain the dominant formation of those congeners at much higher temperatures on SAl ash. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41070]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zheng, Minghui,Zhao, Yuyang,Yang, Hongbo,et al. Thermochemical formation of polychlorinated dibenzo-p-dioxins and dibenzofurans on the fly ash matrix from metal smelting sources[J]. CHEMOSPHERE,2018,191:825-831. |
| APA | Zheng, Minghui.,Zhao, Yuyang.,Yang, Hongbo.,Yang, Lili.,Wu, Xiaolin.,...&Liu, Guorui.(2018).Thermochemical formation of polychlorinated dibenzo-p-dioxins and dibenzofurans on the fly ash matrix from metal smelting sources.CHEMOSPHERE,191,825-831. |
| MLA | Zheng, Minghui,et al."Thermochemical formation of polychlorinated dibenzo-p-dioxins and dibenzofurans on the fly ash matrix from metal smelting sources".CHEMOSPHERE 191(2018):825-831. |
入库方式： OAI收割
来源：生态环境研究中心
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