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Citation: CAO Ji-Lin, XING Dong-Qiang, LIU Xiu-Wu, TAN Zhao-Yang. Synthesis of Magnetic 4A Zeolite at Ultrasonic Condition[J]. Acta Physico-Chimica Sinica, ;2007, 23(12): 1893-1898. doi: 10.3866/PKU.WHXB20071212 shu

Synthesis of Magnetic 4A Zeolite at Ultrasonic Condition

1.
School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China

Received Date: 29 May 2007
Available Online: 8 October 2007

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 od 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.
- Ultrasonic; Magnetic 4A zeolite; Adsorption, Hydrothermal method
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