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Chlorination Mechanism of Carbon during Dioxin Formation Using Cl-K Near-edge X-ray-absorption Fine Structure

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Abstract

Many environmental organic chemicals have chloride in their structure. Thus, researching the chlorination mechanism of carbon is of interest. Dioxins are typically concentrated in fly ash collected from the post-combustion zone during the operation of municipal solid waste incinerators. In this study, we report the application of Cl-K near-edge X-ray-absorption fine structure (NEXAFS) in determining the chlorination mechanism of carbon in fly ash. The separation of a chloride-carbon (C–Cl) bond was readily recognizable as a peak in the Cl-K NEXAFS spectrum. Chlorination effects could be estimated using Cl K-edge NEXAFS with no dependence on metal species. Analysis of Cl K-edge NEXAFS spectra showed the reduction of copper(II) chloride at 300°C and oxidation of iron(III) chloride at 400°C in connection with the chlorination of carbon.

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Author notes

  1. Takashi Fujimori

    Present address: Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan

Authors and Affiliations

  1. Department of Urban and Environmental Engineering, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo, Kyoto, 615-8540, Japan

    Takashi Fujimori, Yuta Tanino, Masaki Takaoka & Shinsuke Morisawa

Authors
  1. Takashi Fujimori
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  2. Yuta Tanino
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  3. Masaki Takaoka
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  4. Shinsuke Morisawa
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Corresponding author

Correspondence to Takashi Fujimori.

Additional information

This is an English edition of the paper which won the Best Paper Award in Bunseki Kagaku, 2009 [Bunseki Kagaku, 2009, 58(4), 221].

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Fujimori, T., Tanino, Y., Takaoka, M. et al. Chlorination Mechanism of Carbon during Dioxin Formation Using Cl-K Near-edge X-ray-absorption Fine Structure. ANAL. SCI. 26, 1119–1125 (2010). https://doi.org/10.2116/analsci.26.1119

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  • DOI: https://doi.org/10.2116/analsci.26.1119

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