Yang Daokui, Kow Kien-Woh, Wang Wenlong, Meredith Will, Zhang Guanlin, Mao Yanpeng, Xu Mengxia
Department of Chemical and Environmental Engineering, and New Materials Institute, University of Nottingham Ningbo China, Ningbo 315100, Zhejiang, China; Key Laboratory of Carbonaceous Waste Processing and Process Intensification of Zhejiang Province, University of Nottingham Ningbo China, Ningbo 315100, Zhejiang, China; National Engineering Laboratory for Reducing Emissions from Coal Combustion, Engineering Research Center of Environmental Thermal Technology of Ministry of Education, Shandong Key Laboratory of Energy Carbon Reduction and Resource Utilization, School of Energy and Power Engineering, Shandong University, Jinan, Shandong 250061, China.
Department of Chemical and Environmental Engineering, and New Materials Institute, University of Nottingham Ningbo China, Ningbo 315100, Zhejiang, China; Key Laboratory of Carbonaceous Waste Processing and Process Intensification of Zhejiang Province, University of Nottingham Ningbo China, Ningbo 315100, Zhejiang, China.
J Hazard Mater. 2024 Nov 5;479:135677. doi: 10.1016/j.jhazmat.2024.135677. Epub 2024 Aug 27.
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 SiO and/or AlO, 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.
城市固体垃圾焚烧飞灰（MSWI-FA）是焚烧过程中产生的一种有害副产品，其特点是重金属、氯化物和二恶英含量较高。由于MSWI-FA的钙含量高但硅/铝含量低，单独处置或再利用时，其固化效果差、能源需求高且火山灰活性有限。相反，含氧化铝/二氧化硅的废物（ASW）具有富含SiO₂和/或Al₂O₃的化学成分，为与MSWI-FA协同处理提供了机会，以促进其无害化处置和资源回收。尽管近年来对MSWI-FA和ASW的联合处理越来越受到关注，但现有文献中仍缺乏对ASW在此过程中作用的全面评估。因此，本研究致力于探讨MSWI-FA和ASW联合处理的进展，重点关注三个关键方面，即阐明ASW改善MSWI-FA固化/稳定化的固定机制，探索MSWI-FA和ASW在各种热和机械化学处理中的协同作用，以及突出在基于MSWI-FA的建筑材料生产中加入ASW的好处。此外，为了实现可持续的固体废物管理，本综述确定了研究差距，并描绘了MSWI-FA和ASW联合处理的未来前景。
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