粉煤灰碱熔融-水热法合成A型沸石及吸附性能研究  

Synthesis of A-Zeolite from Coal Fly Ash by Alkali Fusion-Hydrothermal Process and Its Adsorption Research

作　　者：吴迪秀 罗柳 贾玉娟 程伟[1,2,3] WU Di-xiu;LUO Liu;JIA Yu-juan;CHENG Wei(College of Mining,Guizhou University,Guiyang 550025,China;National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas,Guizhou University,Guiyang 550025,China;Guizhou Key Lab of Comprehensive Utilization of Non-metallic Mineral Resources,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学矿业学院,贵阳550025 [2]贵州大学,喀斯特地区优势矿产资源高效利用国家地方联合工程实验室,贵阳550025 [3]贵州大学,贵州省非金属矿产资源综合利用重点实验室,贵阳550025

出　　处：《硅酸盐通报》2019年第6期1873-1877,共5页Bulletin of the Chinese Ceramic Society

基　　金：贵州省科学技术基金(黔科合J字[2015]2048号);贵州大学引进人才科研项目(贵大人基合字(2014)58号);贵州大学SRT项目(贵大SRT字(2015)173号)

摘　　要：为利用粉煤灰中的铝、硅资源制备高性能吸附材料,本研究以贵州某地粉煤灰为原料,采用“碱熔融-水热合成法”合成A型沸石,并考察了合成沸石对溶液中Cu2+的吸附性能。研究运用单因素法考察不同碱灰比、焙烧时间、晶化温度及晶化时间对沸石合成效果的影响,采用扫描电镜(SEM)、X射线衍射仪(XRD)对合成沸石表面形貌和晶体特征进行表征。在此基础上,考察了粉煤灰合成沸石对模拟料液中Cu2+的吸附效果。结果表明:当粉煤灰原灰中铝硅比约为1∶1,在碱灰比为1.3∶1、焙烧温度650℃、焙烧时间60min、晶化温度100℃、晶化时间8h条件下,合成了晶型较为理想的A型沸石产品,合成沸石对Cu2+吸附效果较好,对溶液中Cu2+的去除率大于95%。The alkali-fusion-hydrothermal process has been used to synthesize A-zeolite from fly ash in Guizhou Province. The effect of different alkali-ash ratio,calcination time,crystallization temperature and crystallization time on zeolite synthesis were investigated by single factor method. The surface morphology and crystal features of the zeolite products were characterized by Scanning Electron Microscopy( SEM) and X-Ray Diffraction( XRD) respectively. The results show that the optimal synthesis condition is as follows: the ratio of silica to silica is about 1 ∶ 1,the ratio of alkali to ash is 1. 3∶ 1,the calcination temperature is 650 ℃, the calcination time is 60 min, the crystallization temperature is 100 ℃ and the crystallization time is 8 h. Under this condition,the adsorption ability of the A-zeolite towards Cu2+ in aqueous solution can be maximized,and the adsorption rate is over 95%.

关 键 词：粉煤灰 碱熔融法 水热合成法 沸石 

分 类 号：TQ173[化学工程—搪瓷工业]