磁性ZSM-5分子筛的合成及吸附性能研究

Study on Synthesis and Adsorption Performance of Magnetic Properties ZSM-5 Zeolite

采用水热晶化法,加入不同质量的磁粉Fe3O4,按照12 Na2O:100 SiO2:2 Al2O3:2500 H2O的摩尔配比,180℃24 h合成不同的磁性ZSM-5分子筛样品,并采用XRD,SEM等手段技术对磁性分子筛进行表征。考察了投加量,pH,以及温度对吸附效果的影响,结果表明,当温度为25℃,投加量为0.4 g/L,pH为4时用含Fe3O4 2.65%的ZSM-5分子筛对20 mg/L的对硝基苯酚进行吸附试验,其吸附效率为69.23%,并采用简单的磁力方法进行了回收。

Different magnetismZSM-5 molecular sieve were synthesized with hydrothermal method,adding different amounts of magnetic Fe3O4, and according to the molar ratio of 12 Na2O:100 SiO2:2 Al2O3:2500 H2 O,in 180 ℃ for 24 hours. These magnetic zeolite were characterized using XRD, SEM. The adsorption influence factors of pH, dosage and temperature on the adsorption effect are investigated. The results shows that when the temperature is 25 ℃, dosing quantity is 0.4 g/L, pH is 4, 2.65% Fe3O4 of ZSM-5 zeolite to test the absorption of 20 mg/L p-nitrophenol, its adsorption efficiency is 69.23%, and sample can be recycled with simple magneticmethod.