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Microstructures and thermal properties of municipal solid waste incineration fly ash

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Abstract

To analyze the feasibility of utilization of thermal technology in fly ash treatment, thermal properties and microstructures of municipal solid waste incineration (MSWI) fly ash were studied by measuring the chemical element composition, specific surface area, pore sizes, functional groups, TEM image, mineralogy and DSC-TG curves of raw and sintered fly ash specimens. The results show that MSWI fly ash particles mostly have irregular shapes and non-typical pore structure, and the supersonic treatment improves the pore structure; MSWI fly ash consists of such crystals as SiO2, CaSO4 and silica-aluminates, and some soluble salts like KCl and NaCl. During the sintering process, mineralogy changes largely and novel solid solutions are produced gradually with the rise of temperature. Therefore, the utilization of a proper thermal technology not only destructs those persistent organic toxicants but also stabilizes hazardous heavy metals in MSWI fly ash.

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Authors and Affiliations

  1. Key Laboratory of The Three Gorges Reservoir Region’s Eco-environmental of Ministry of Education, Chongqing University, Chongqing, 400044, China

    Yuan-yuan Liu  (刘元元) & Jia-jia Wang  (王佳佳)

  2. College of Resources and Environmental Science, Chongqing University, Chongqing, 400044, China

    Xiang Lin  (林祥), Li-ao Wang  (王里奥) & Wei Yang  (杨威)

  3. College of Environment and Resources, Guangxi Normal University, Guilin, 541004, China

    Shan Zhong  (钟山)

Authors
  1. Yuan-yuan Liu  (刘元元)
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  2. Jia-jia Wang  (王佳佳)
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  3. Xiang Lin  (林祥)
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  4. Li-ao Wang  (王里奥)
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  5. Shan Zhong  (钟山)
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  6. Wei Yang  (杨威)
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Corresponding author

Correspondence to Yuan-yuan Liu  (刘元元).

Additional information

Foundation item: Project(50808184) supported by the National Natural Science Foundation of China

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Liu, Yy., Wang, Jj., Lin, X. et al. Microstructures and thermal properties of municipal solid waste incineration fly ash. J. Cent. South Univ. Technol. 19, 855–862 (2012). https://doi.org/10.1007/s11771-012-1083-5

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  • DOI: https://doi.org/10.1007/s11771-012-1083-5

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