标题: Co-fabrication of feldspar-cordierite ceramics from multi-solid wastes: Design, sintering behavior, and microstructural transformation

作者: Li, A (Li, An); Zeng, TY (Zeng, Tianyu); Li, JH (Li, Jiahao); Lan, JR (Lan, Jirong); Luo, T (Luo, Teng); Zhou, M (Zhou, Min); Hou, HB (Hou, Haobo)

来源出版物: CONSTRUCTION AND BUILDING MATERIALS 卷: 485 文献号: 141941 DOI: 10.1016/j.conbuildmat.2025.141941 Published Date: 2025 JUL 25

摘要: Addressing the challenges of pollution control and resource utilization of hazardous wastes like secondary aluminum ash (SAA) and municipal solid waste incineration fly ash (MSWIFA), this study developed a method for synthesizing high-performance porous ceramics from mixed solid wastes. A systematic evaluation was conducted on the phase transformation, physical properties, high-temperature deformation, sintering kinetics, structural integrity, and pollutant control of the prepared porous ceramics. The results indicated that with SAA, MSWIFA, and serpentine contents of 29 %, 15 %, and 5 %, respectively, at a sintering temperature of 1180 degrees C, the resulting porous ceramics achieved an optimal porosity of 55.28 %, a bulk density of 0.81 g/cm3, a compressive strength of 6.12 MPa, and a corrosion resistance of 91.01 %. Sintering kinetics revealed that the addition of 5 % serpentine resulted in the lowest activation energy for high-temperature sintering, at 153.80 kJ/mol. Removal rates for F-, Cl-, and NH3-N reached 94 %, with SAA formula ceramic achieving a fluoride (F-) removal rate of 96.02 %, and S formula ceramic achieving removal rates of 99.92 % for Cl-and 99.91 % for NH3-N. The leachate concentrations of the composite porous ceramics were below the relevant standard limits for construction concrete, ensuring environmental safety. This study highlights the significance of the silicate network structure in the melting and mechanical properties of the porous ceramics, providing a sustainable solution for the coordinated safe disposal and phase-oriented transformation of mixed solid wastes.

作者关键词: Porous ceramic; Multi-solid wastes; Phase-oriented transformation; Sintering behavior; Microstructure

KeyWords Plus: POROUS MULLITE CERAMICS; FLY-ASH; INCINERATION; DIFFUSION; ALBITE; CHINA; DROSS; XPS

地址: [Li, An; Zeng, Tianyu; Li, Jiahao; Zhou, Min; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

[Zeng, Tianyu; Luo, Teng; Hou, Haobo] Wuhan Univ, Zhaoqing Inst Resources & Environm Technol, Zhaoqing 526200, Guangdong, Peoples R China.

[Lan, Jirong] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China.

通讯作者地址: Zeng, TY; Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址: zty_0209@163.com; houhb@whu.edu.cn

影响因子：8