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Materials 2016, 9(5), 364; doi:10.3390/ma9050364

Effective Degradation of Aqueous Tetracycline Using a Nano-TiO2/Carbon Electrocatalytic Membrane

1
Institute of Medical Equipment, Academy of Military Medical Sciences, Tianjin 300161, China
2
State Key Laboratory of Hollow Fiber Membrane Materials and Processes, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
*
Authors to whom correspondence should be addressed.
Academic Editor: George Zhao
Received: 10 March 2016 / Revised: 27 April 2016 / Accepted: 10 May 2016 / Published: 12 May 2016
(This article belongs to the Special Issue Porous Materials for Water Technology)
View Full-Text   |   Download PDF [3536 KB, uploaded 12 May 2016]   |  

Abstract

In this work, an electrocatalytic membrane was prepared to degrade aqueous tetracycline (TC) using a carbon membrane coated with nano-TiO2 via a sol-gel process. SEM, XRD, EDS, and XPS were used to characterize the composition and structure of the electrocatalytic membrane. The effect of operating conditions on the removal rate of tetracycline was investigated systematically. The results show that the chemical oxygen demand (COD) removal rate increased with increasing residence time while it decreased with increasing the initial concentration of tetracycline. Moreover, pH had little effect on the removal of tetracycline, and the electrocatalytic membrane could effectively remove tetracycline with initial concentration of 50 mg·L−1 (pH, 3.8–9.6). The 100% tetracycline and 87.8% COD removal rate could be achieved under the following operating conditions: tetracycline concentration of 50 mg·L−1, current density of 1 mA·cm−2, temperature of 25 °C, and residence time of 4.4 min. This study provides a new and feasible method for removing antibiotics in water with the synergistic effect of electrocatalytic oxidation and membrane separation. It is evident that there will be a broad market for the application of electrocatalytic membrane in the field of antibiotic wastewater treatment. View Full-Text
Keywords: electrocatalytic membrane; nano-TiO2; electrocatalytic oxidation; membrane separation; tetracycline electrocatalytic membrane; nano-TiO2; electrocatalytic oxidation; membrane separation; tetracycline
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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. (CC BY 4.0).

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Liu, Z.; Zhu, M.; Wang, Z.; Wang, H.; Deng, C.; Li, K. Effective Degradation of Aqueous Tetracycline Using a Nano-TiO2/Carbon Electrocatalytic Membrane. Materials 2016, 9, 364.

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