Coal fly ash (CFA) is an industrial solid waste discharged from coal-fired power plants. Due to the high contents of aluminum and silicon, it can be direct used for synthesis of zeolites. In this study, cancrinite (CAN) type zeolite was prepared from CFA by a novel hot stuffy method. The effects of various parameters such as alkaline dosage, crystallization temperature and holding time on the formation of zeolite were studied systematically. A well-crystallized CAN type zeolite was synthesized after mixing CFA with NaOH in a mortar followed by hot stuffy at 140 °C for 4 h. The characterized results revealed that the CAN zeolite showed a solo mineral phase with typical porous surface and internal ring structure. The synthesized zeolite was used as an adsorbent to remove anionic acid from aqueous solution, exhibiting great adsorption performance with 98% removal efficiency within 40 min. This study provided a facile alternative for efficient utilization of solid waste to produce high value-added zeolite, exhibiting great potential for industrial application.

粉煤灰（CFA）是燃煤电厂排放的工业固体废物。由于铝和硅含量高，可直接用于合成沸石。本研究以CFA为原料，采用新型热闷法制备了cancrinite (CAN)型沸石。系统研究了碱用量、结晶温度和保温时间等参数对沸石形成的影响。将 CFA 和 NaOH 在研钵中混合，然后在 140 ℃热闷 4 小时，合成结晶良好的 CAN 型沸石。 H。表征结果表明，CAN沸石呈现出具有典型多孔表面和内部环状结构的单一矿物相。合成的沸石用作吸附剂从水溶液中去除阴离子酸，表现出良好的吸附性能，40  min 内去除效率达 98%。该研究为有效利用固体废物生产高附加值沸石提供了一种简便的替代方案，具有巨大的工业应用潜力。