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Plasma Sci. Technol. ›› 2019, Vol. 21 ›› Issue (6): 065503.doi: 10.1088/2058-6272/ab079c

• Plasma Technology • Previous Articles     Next Articles

Plasma-catalytic degradation of tetracycline hydrochloride over Mn/γ-Al2O3 catalysts in a dielectric barrier discharge reactor

Baowei WANG (王保伟), Chao WANG (王超), Shumei YAO (姚淑美), Yeping PENG (彭叶平) and Yan XU (徐艳)   

  

  1. Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
  • Received:2018-11-14 Published:2019-01-30
  • Supported by:

    This work is financially supported by National Key Research and Development Program of China (No. 2016YFB0600703) and Shijiazhuang City Important Science and Technology project (No. 176240857A).

Abstract:

A coaxial dielectric barrier discharge (DBD) reactor was used for plasma-catalytic degradation of tetracycline hydrochloride over a series of Mn/γ-Al2O3  catalysts prepared by the incipient wetness impregnation method. The combination of plasma and the Mn/γ-Al2O3  catalysts significantly enhanced the degradation efficiency of tetracycline hydrochloride compared to the plasma process alone, with the 10% Mn/γ-Al2O3  catalyst exhibiting the best tetracycline hydrochloride degradation efficiency. A maximum degradation efficiency of 99.3% can be achieved after 5 min oxidation and a discharge power of 1.3 W, with only 69.7% by a single plasma process. The highest energy yield of the plasma-catalytic process is 91.7 gkWh−1. Probable reaction mechanisms of the plasma-catalytic removal of tetracycline hydrochloride were also proposed.

Key words: antibiotics, dielectric barrier discharge, Mn/γ-Al2O3, plasma-catalytic, tetracycline hydrochloride hydrochloride