Speciation Analysis for Cadmium in Fly Ash

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  • Funatsuki Atsushi
    Forensic Science Laboratory, Mie Prefectural Police H.Q.
  • Takaoka Masaki
    Department of Urban and Environmental Engineering, Graduate school of Engineering Kyoto University
  • Kokubu Daisuke
    Forensic Science Laboratory, Mie Prefectural Police H.Q.
  • Oshita Kazuyuki
    Department of Urban and Environmental Engineering, Graduate school of Engineering Kyoto University
  • Takeda Nobuo
    Ritsumeikan University Research Center for Eco-Technology

Bibliographic Information

Other Title
  • 飛灰中カドミウムの化学形態分析
  • ヒカイ チュウ カドミウム ノ カガク ケイタイ ブンセキ

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Abstract

Eight kinds of municipal solid waste incineration fly ash and two kinds of molten fly ash were analyzed for the speciation of cadmium by a sequential extraction procedure, a pH-dependent test and X-ray absorption fine structure (XAFS). Concerning the result of XAFS, cadmium in fly ash was represented with CdCl2 : 94% + Cd : 6%. When the pH in the water-soluble fraction of the sequential extraction procedure is highly alkaline, it is presumed that CdCl2 is dissolved, and then precipitates in the form of Cd(OH)2, which is dissolved in the form of an ammine complex in the AcONH4 fraction of the sequential extraction procedure. When the pH in the water-soluble fraction is neutral, CdCl2 is dissolved and does not precipitate. The experimental result of sequential extraction, pH-dependent test and XAFS were consistent with modeling by Visual MINTEQ.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 59 (9), 801-810, 2010

    The Japan Society for Analytical Chemistry

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