Transforming MSWI fly ash and waste glass into hierarchical pores of foam glass-ceramics for effective adsorption
Zhang J. Deng J. Shen H. Zhang D. Simões M.F. Antunes A. Liu B.
10 October 2025Elsevier Ltd
Construction and Building Materials
2025#494
Municipal solid waste incineration (MSWI) fly ash is classified as hazardous solid waste due to the presence of heavy metals and dioxins. In this study, a novel alkali-activated sintering process was developed to prepare foam glass-ceramics derived from MSWI fly ash. These ceramics were then utilized to adsorb malachite green due to their hierarchical pores. The effects of foaming agent dosage, raw material proportion, thermal temperature, holding time on the phases transition, chemical bonds, hierarchical pores, and other parameters were investigated. The mechanism of in-situ development of hierarchical pores and efficient adsorption of pollutants was clarified. Foam glass-ceramics with maximum porosity of 82.12 % and water absorption of 103.13 % were prepared under optimal parameters of the foaming agent: an alkali-activated system of 1.75 wt%, MSWI fly ash content of 40 wt%, and sintering at 1000℃ for 2 h. These foam glass-ceramics achieved an adsorption rate of 82.45–97.20 % for malachite green. This study has proposed an innovative method for the environmental recycling of MSWI fly ash by converting it into high-porosity and high-adsorption foam glass-ceramics.
Alkali-activated , Foam glass-ceramics , MSWI fly ash , Resource utilization , Waste glass
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Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, China
State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macao, China
China National Space Administration, Macau Center for Space Exploration and Science, Macao, China
Institute of Science and Environment, University of Saint Joseph, Macao, China
Department of Civil and Environmental Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, Kazakhstan
Shunde Innovation School, University of Science and Technology Beijing, Foshan, China
Institute for Advanced Materials and Technology
State Key Laboratory of Lunar and Planetary Sciences
China National Space Administration
Institute of Science and Environment
Department of Civil and Environmental Engineering
Shunde Innovation School
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