【摘要】 为了解决微细粉末状沸石产品应用中与所处理溶液难以分离的问题,在传统水热合成法合成4A沸石的晶化原料液中,加入磁性Fe3O4微粒,经过70℃,功率为100W的超声波晶化6h,合成了一系列Fe3O4含量不同的磁性4A沸石,并对其进行了XRD、SEM、IR、TG/DTA、EDX、磁化率及吸附性能等表征测试.结果表明,磁性4A沸石具有良好的磁稳定性,其磁化率随Fe3O4含量的增加而增大;磁性4A沸石对水中氟离子和六价铬的吸附与纯4A沸石性能相同,其吸附速率可以用拟二级动力学方程来描述.更多还原

【Abstract】 In order to solve the difficulty in separating powdery 4A zeolite from solution in application of 4A zeolite,a series of magnetic 4A zeolites with different Fe3O4 contents were synthesized by traditional hydrothermal method through ultrasonic crystallization for 6 h at 70 ℃ after adding magnetic Fe3O4 particulates to the crystallization solution for 4A zeolite synthesis.The products were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),IR,magnetic susceptibility,TG/DTA,EDX and ion exchange capability.The results showed that the magnetic 4A zeolite had good magnetism and its magnetic susceptibility increased with the Fe3O4 amount increasing.For adsorption of F-and Cr(VI)in water,the adsorption capability of magnetic 4A zeolite is equal with the pure 4A zeolite and the adsorption rate filled well the pseudo-second-order rate model.更多还原