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Advances in Materials Science and Engineering
Volume 2014, Article ID 409086, 5 pages
Research Article

Degradation of Tetracycline by Birnessite under Microwave Irradiation

School of Material Sciences and Technology, China University of Geosciences, Beijing 100083, China

Received 19 June 2014; Revised 14 August 2014; Accepted 14 August 2014; Published 2 September 2014

Academic Editor: Ying Li

Copyright © 2014 Meng Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The efficiency and factors affecting tetracycline (TC) degradation by birnessite under microwave irradiation (MI) were investigated under different initial TC concentrations, solution pH, MI time, and MI power. The crystal structure, degradation efficiency, and reaction mechanism were investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and ultraviolet-visible spectroscopy (UV-Vis). The results showed that birnessite was an excellent microwave catalyst. The maximum TC removal efficiency by birnessite was 99% under MI at 400 W for 30 min in strongly acidic media. Under MI, the surface activity of birnessite increased, resulting in the ability to accelerate TC removal in high temperature.