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Acta Physico-Chimica Sinica  2007, Vol. 23 Issue (12): 1893-1898    DOI: 10.3866/PKU.WHXB20071212
Synthesis of Magnetic 4A Zeolite at Ultrasonic Condition
CAO Ji-Lin; XING Dong-Qiang; LIU Xiu-Wu; TAN Zhao-Yang
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
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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 wordsUltrasonic      Magnetic 4A zeolite      Adsorption, Hydrothermal method     
Received: 29 May 2007      Published: 08 October 2007
MSC2000:  O643  
Corresponding Authors: CAO Ji-Lin     E-mail:
Cite this article:

CAO Ji-Lin; XING Dong-Qiang; LIU Xiu-Wu; TAN Zhao-Yang. Synthesis of Magnetic 4A Zeolite at Ultrasonic Condition. Acta Physico-Chimica Sinica, 2007, 23(12): 1893-1898.

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