Co-treatment of municipal solid waste incineration fly ash and alumina-/silica-containing waste: A critical review

Yang, Daokui; Kow, Kien Woh; Wang, Wenlong; Meredith, Will; Zhang, Guanlin; Mao, Yanpeng; Xu, Mengxia

Abstract

Municipal solid waste incineration fly ash (MSWI-FA) is a hazardous by-product of the incineration process, characterized by elevated levels of heavy metals, chlorides, and dioxins. With a composition high in calcium but low in silicon/aluminum, MSWI-FA exhibits a poor immobilization effect, high energy demands, and limited pozzolanic activity when it is disposed of or reutilized alone. Conversely, alumina-/silica-containing waste (ASW) presents a chemical composition rich in SiO2 and/or Al2O3, offering an opportunity for synergistic treatment with MSWI-FA to facilitate its harmless disposal and resource recovery. Despite the growing interest in co-treatment of MSWI-FA and ASW in recent years, a comprehensive evaluation of ASW's roles in this process remains absent from the existing literature. Therefore, this study endeavors to examine the advancement in the co-treatment of MSWI-FA and ASW, with the focus on three key aspects, i.e., elucidating the immobilization mechanisms by which ASW improves the solidification/stabilization of MSWI-FA, exploring the synergies between MSWI-FA and ASW in various thermal and mechanochemical treatments, and highlighting the benefits of incorporating ASW in the production of MSWI-FA-based building materials. Additionally, in the pursuit of sustainable solid waste management, this review identifies research gaps and delineates future prospects for the co-treatment of MSWI-FA and ASW.

Citation

Yang, D., Kow, K. W., Wang, W., Meredith, W., Zhang, G., Mao, Y., & Xu, M. (2024). Co-treatment of municipal solid waste incineration fly ash and alumina-/silica-containing waste: A critical review. Journal of Hazardous Materials, 479, Article 135677. https://doi.org/10.1016/j.jhazmat.2024.135677

• Journal Article Type: Review
• Acceptance Date: Aug 26, 2024
• Online Publication Date: Aug 27, 2024
• Publication Date: Nov 5, 2024
• Deposit Date: Sep 13, 2024
• Publicly Available Date: Sep 13, 2024
• Journal: Journal of Hazardous Materials
• Print ISSN: 0304-3894
• Electronic ISSN: 1873-3336
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 479
• Article Number: 135677
• DOI: https://doi.org/10.1016/j.jhazmat.2024.135677
• Keywords: MSWI-FA, Heavy metal, Dioxin, Solidification/stabilization, Thermal treatment, Mechanochemical treatment, Building material
• Public URL: https://nottingham-repository.worktribe.com/output/39178222
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0304389424022568?via%3Dihub