Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (12): 1893-1898.doi: 10.3866/PKU.WHXB20071212

• ARTICLE • Previous Articles     Next Articles

Synthesis of Magnetic 4A Zeolite at Ultrasonic Condition

CAO Ji-Lin; XING Dong-Qiang; LIU Xiu-Wu; TAN Zhao-Yang   

  1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
  • Received:2007-05-29 Revised:2007-09-04 Published:2007-11-30
  • Contact: CAO Ji-Lin

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.

Key words: Ultrasonic, Magnetic 4A zeolite, Adsorption, Hydrothermal method