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<p>The accelerating climate change requires rapid techniques to both sequester carbon dioxide and recycle solid waste. Here we review&#xa0;the&#xa0;accelerated carbonation of fly ash from municipal solid waste with emphasis on carbonation methods, carbon dioxide sequestration capability, influence of carbonation on fly ash properties, fly ash as a cementitious material, non-conventional uses of fly ash, environmental and economic benefits, mixing with other waste materials, pilot and industrial applications, and limitations. We observe that the&#xa0;accelerated carbonation of fly ash allows for carbon dioxide capture of up to 0.24&#xa0;g CO<sub>2</sub> per gram of ash, reduces heavy metal leaching, facilitates the&#xa0;reuse of stabilized ashes, and generates materials suitable for a wide&#xa0;range of uses. Limitations include possible pH-induced remobilization of toxic metals such as cadmium, chromium, and antimony.</p>

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Accelerated carbonation of municipal waste fly ash for carbon sequestration: a review

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Fikret Muge Alptekin,
  • Alessandra Zanoletti,
  • Laura E. Depero,
  • Elza Bontempi

摘要

The accelerating climate change requires rapid techniques to both sequester carbon dioxide and recycle solid waste. Here we review the accelerated carbonation of fly ash from municipal solid waste with emphasis on carbonation methods, carbon dioxide sequestration capability, influence of carbonation on fly ash properties, fly ash as a cementitious material, non-conventional uses of fly ash, environmental and economic benefits, mixing with other waste materials, pilot and industrial applications, and limitations. We observe that the accelerated carbonation of fly ash allows for carbon dioxide capture of up to 0.24 g CO2 per gram of ash, reduces heavy metal leaching, facilitates the reuse of stabilized ashes, and generates materials suitable for a wide range of uses. Limitations include possible pH-induced remobilization of toxic metals such as cadmium, chromium, and antimony.