由粉煤灰制备沸石分子筛及其吸附脱除水中氨氮的性能研究  

Preparation of Zeolite Molecular Sieve from Fly Ash and Its Performance in Adsorption and Removal of Ammonia Nitrogen from Water

作　　者：张子妍 李玉杰 张燕君 陈彦琦 陶菲菲[1] ZHANG Ziyan;LI Yujie;ZHANG Yanjun;CHEN Yanqi;TAO Feifei(Department of Chemistry and Chemical Engeering,Shaoxing University,Zhejiang Shaoxing 312000,China)

机构地区：[1]绍兴文理学院化学化工学院,浙江绍兴312000

出　　处：《广州化工》2025年第4期33-36,共4页GuangZhou Chemical Industry

摘　　要：采用碱熔融-水热晶化法,通过调控灰碱比、硅铝比、碱熔融温度、固液比和晶化时间等主要工艺参数,将预处理后的粉煤灰成功制备成一系列Na A型沸石分子筛。结合XRD、SEM、TEM、EDS等表征,筛选出Na A型沸石分子筛的最佳合成工艺条件为灰碱比1∶1.2、硅铝比2∶1、碱熔融温度600℃、固液比1∶6和晶化时间6 h。优化后的Na A型沸石分子筛是形貌规则、尺寸约1.5μm的立方体,其结晶度高、晶型完整、分散性好,比表面积为486.73 m^(2)/g,平均孔径为20.2?,孔容为0.246 cm^(3)/g,化学式为Na_(10)Al_(14)Si_(14)O_(54)·5H_(2)O,可交换阳离子含量为114 mg/g。将优化Na A型沸石分子筛用于水体中氨氮吸附性能研究,显示出快速、高效的氨氮去除能力。50 mg Na A型沸石分子筛吸附容量达到34.6 mg/g,去除率69.2%;研究氯化铵溶液浓度对吸附性能影响,发现最大吸附容量达到69.3 mg/g。The alkali melting hydrothermal crystallization method was adopted.By adjusting the main process parameters such as ash alkali ratio silicon aluminum ratio,alkali melting temperature,solid-liquid ratio and crystallization time,a series of NaA zeolite molecular sieves were successfully prepared from pre treated fly ash.By combining XRD,SEM,TEM,EDS and other characterizations,the optimal synthesis process conditions for NaA zeolite molecular sieve were selected as follows:ash alkali ratio was 1∶1.2,silicon aluminum ratio was 2∶1,alkali melting temperature was 600℃,solid-liquid ratio was 1∶6,and crystallization time was 6 h.The optimized NaA zeolite molecular sieve had a regular morphology and a size of approximately 1.5μm.The cube of m had high crystallinity,complete crystal form,good dispersibility,a specific surface area of 486.73 m^(2)/g,an average pore size of 20.2Å,a pore volume of 0.246 cm^(3)/g,a chemical formula of Na_(10)Al_(14)Si_(14)O_(54)·5H_(2)O,and an exchangeable cation content of 114 mg/g.The optimization of NaA zeolite molecular sieve was used to study the adsorption performance of ammonia nitrogen in water,showing a fast and efficient ammonia nitrogen removal ability.The adsorption capacity of 50 mg NaA zeolite molecular sieve reached 34.6 mg/g,with a removal rate of 69.2%.The effect of ammonium chloride solution concentration on adsorption performance was studied,and the maximum adsorption capacity was found to reach 69.3 mg/g.

关 键 词：粉煤灰 工艺优化 沸石分子筛 表征 氨氮吸附 

分 类 号：X703[环境科学与工程—环境工程]