有色金属科学与工程2026，Vol.17Issue(4)：611-620,10.DOI:10.13264/j.cnki.ysjskx.2026.04.013
粉煤灰协同赤泥合成沸石及其吸附性能研究
Synthesis of zeolite from fly ash with red mud and its adsorption performance
摘要
Abstract
In order to enrich and utilize the valuable elements of silicon and aluminum in red mud and fly ash,zeolite was synthesized by the alkali melting-hydrothermal method.By integrating X-ray diffraction(XRD)and scanning electron microscopy with energy dispersive spectroscopy(SEM-EDS),the effects of the molar ratio of silicon-to-aluminum(n(Si)∶n(Al)),hydrothermal crystallization temperature and duration on the synthesis of red mud-fly ash-derived zeolite were systematically investigated.The BET specific surface area and pore size distribution of the samples were determined by the low-temperature nitrogen adsorption static capacity method.Combined with Cu2+adsorption experiments,the adsorption performance of the synthesized zeolite was systematically evaluated.The results showed that with the n(Si)∶n(Al)range of 1∶0.70 to 1∶0.60,increasing the silicon-aluminum ratio was conducive to the generation of P1 zeolite.The temperature of hydrothermal crystallization should be strictly controlled.A temperature that was too low hindered the formation of crystal nuclei,whereas an excessively high temperature might lead to coarse grain development and induce phase transformation.The duration of crystallization significantly influenced both the crystallinity and grain size of the synthesized zeolites.Under the conditions of n(Si)∶n(Al)=1∶0.65,a crystallization temperature of 100℃,and a duration of 10 h,well-crystallized P1 zeolite,faujasite zeolite and X zeolite were simultaneously obtained.The synthesized zeolite exhibited excellent nitrogen adsorption performance and Cu2+adsorption capacity.When the amount of zeolite was 3.0 g/L,the adsorption efficiency increased with temperature,and the adsorption rate for Cu2+at 60℃reached 98.04%.This indicated that the material could achieve high-efficiency removal of heavy metals under mild conditions,providing a feasible path for the high-value utilization of red mud and fly ash.关键词
粉煤灰/赤泥/沸石/水热法/Cu2+吸附/资源化利用Key words
fly ash/red mud/zeolite/hydrothermal method/Cu2+adsorption/resource utilization分类
矿业与冶金引用本文复制引用
吕逸飞,吕馨悦,赵梦瑶,邱家用,赵经宇,文应江,马玉想,赵凯,何舒丞..粉煤灰协同赤泥合成沸石及其吸附性能研究[J].有色金属科学与工程,2026,17(4):611-620,10.基金项目
江苏省大学生创新创业训练计划项目(S202513991047,S202513991050) （S202513991047,S202513991050）
江苏科技大学大学生创新训练计划项目(X202510289899) （X202510289899）
江苏省教育厅2025年研究生科研与实践创新项目(SJCX25_2550) （SJCX25_2550）
