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The production of municipal solid waste (MSW) is increasing rapidly because of population growth and the disposal of solid products creates serious environmental and health issues as it consists of leachable heavy metals. Incineration has emerged as a common method for waste management, resulting in the generation of fly ash (FA) as a by-product. This study aimed to investigate the application of electrodialysis (ED) to remove heavy metals from incinerated municipal solid waste fly ash (IMSW-FA) thus addressing its environmental hazards. The electrodialysis treatment effect on IMSW-FA was evaluated through a 7-day run. Parameters such as pH, conductivity, and current were monitored and recorded daily. The elemental composition and crystallinity of untreated and treated IMSW-FA were analyzed using X-Ray Fluorescence Spectrometer (Rigaku Primus II) (XRF) and X-ray Diffractometer (Siemens D501 model) (XRD), respectively. Moreover, the concentrations of heavy metals in the treated wastewater were determined by the Inductively coupled plasma optical emission spectroscopy (ICP-OES). The results showed that ED treatment significantly reduced the concentration of heavy metals, mainly Manganese (Mn), Copper (Cu), Zinc (Zn) and Al with the removal efficiencies of 100, 92.16, 67.52 and 33.46%, respectively. Removing heavy metals from IMSW-FA using ED treatment was successful, indicating high potential of ED treatment to reduce heavy metals from IMSW-FA thus promoting sustainable waste management practices.

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Electrodialytic Treatment of Incinerated Municipality Solid Waste (IMSW) for Resource Recovery

  • 会议论文

  • 发表日期：

    2026年

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  • Makali Motumi,
  • Ivine Makani,
  • Freeman Ntuli,
  • Thandiwe Sithole,
  • Tumeletso Lekgoba,
  • Gunvor Kirkelund,
  • Lisbeth Ottosen

摘要

The production of municipal solid waste (MSW) is increasing rapidly because of population growth and the disposal of solid products creates serious environmental and health issues as it consists of leachable heavy metals. Incineration has emerged as a common method for waste management, resulting in the generation of fly ash (FA) as a by-product. This study aimed to investigate the application of electrodialysis (ED) to remove heavy metals from incinerated municipal solid waste fly ash (IMSW-FA) thus addressing its environmental hazards. The electrodialysis treatment effect on IMSW-FA was evaluated through a 7-day run. Parameters such as pH, conductivity, and current were monitored and recorded daily. The elemental composition and crystallinity of untreated and treated IMSW-FA were analyzed using X-Ray Fluorescence Spectrometer (Rigaku Primus II) (XRF) and X-ray Diffractometer (Siemens D501 model) (XRD), respectively. Moreover, the concentrations of heavy metals in the treated wastewater were determined by the Inductively coupled plasma optical emission spectroscopy (ICP-OES). The results showed that ED treatment significantly reduced the concentration of heavy metals, mainly Manganese (Mn), Copper (Cu), Zinc (Zn) and Al with the removal efficiencies of 100, 92.16, 67.52 and 33.46%, respectively. Removing heavy metals from IMSW-FA using ED treatment was successful, indicating high potential of ED treatment to reduce heavy metals from IMSW-FA thus promoting sustainable waste management practices.