Fusion pretreatment is introduced to the microwave-assisted hydrothermal process to improve the zeolite fabrication from municipal solid waste incineration (MSWI) fly ash. The fusion-pretreated microwave-assisted hydrothermal method (FMHM) and microwave-assisted hydrothermal method are conducted and systematically compared. With fusion pretreatment, the quartz is transformed into amorphous form, which is easier to dissolve into a hydrothermal solution and thus accelerates the zeolite fabrication process. The scanning electron microscope, X-ray diffraction, Fourier transform infrared measurement and thermal gravimetric analysis are performed, whose results suggest the formation of zeolite materials in the FMHM product, such as needle-like tobermorite and rose-like sodalite. The thermal gravimetric analysis indicates water adsorption of the FMHM product is improved. The cation exchange capacity of the FMHM product is 1.172 meq g⁻¹, more than twofold larger than that of the MHM product. Additionally, the toxicity test indicates that the leakage of heavy metal ions from the FMHM product is dramatically reduced. The improved safety makes the zeolitic product synthesized from MSWI fly ash promising for further applications. FMHM significantly facilitates the disposal and reuse of the MSWI fly ash.

将熔融预处理引入微波辅助水热工艺中，以改善由城市固体废物焚烧（MSWI）粉煤灰生产的沸石。进行了熔融预处理微波辅助水热法（FMHM）和微波辅助水热法的比较。通过熔融预处理，石英转变为非晶态形式，更易于溶解为水热溶液，从而加快了沸石的制造过程。进行了扫描电子显微镜，X射线衍射，傅立叶变换红外测量和热重分析，结果表明在FMHM产品中形成了沸石材料，如针状雪铁矿和玫瑰状方钠石。热重分析表明FMHM产物的水吸附得到改善。FMHM产品的阳离子交换容量为1.172 meq g^-1，比MHM产品的两倍大。此外，毒性测试表明，FMHM产品中重金属离子的泄漏显着减少。改进的安全性使MSWI粉煤灰合成的沸石产品有望进一步应用。FMHM极大地促进了MSWI粉煤灰的处置和再利用。