Degradation of Tetracycline with BiFeO3 Prepared by a Simple Hydrothermal Method

Materials

Zhehua Xue¹  Ting Wang¹  Bingdi Chen²  Tyler Malkoske¹  Shuili Yu¹  Yulin Tang¹ 

[1] State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, China; E-Mails:;The Institute for Advanced Materials and Nano Biomedicine, Tongji University, Shanghai 200092, China; E-Mail:

关键词: tetracycline;    bismuth ferrite;    visible light photocatalysis;    Fenton;    photo-Fenton;   

DOI  :  10.3390/ma8095310

来源: mdpi

【 摘 要 】

BiFeO₃ particles (BFO) were prepared by a simple hydrothermal method and characterized. BFO was pure, with a wide particle size distribution, and was visible light responsive. Tetracycline was chosen as the model pollutant in this study. The pH value was an important factor influencing the degradation efficiency. The total organic carbon (TOC) measurement was emphasized as a potential standard to evaluate the visible light photocatalytic degradation efficiency. The photo-Fenton process showed much better degradation efficiency and a wider pH adaptive range than photocatalysis or the Fenton process solely. The optimal residual TOC concentrations of the photocatalysis, Fenton and photo-Fenton processes were 81%, 65% and 21%, while the rate constants of the three processes under the same condition where the best residual TOC was acquired were 9.7 × 10⁻³, 3.2 × 10⁻² and 1.5 × 10⁻¹ min⁻¹, respectively. BFO was demonstrated to have excellent stability and reusability. A comparison among different reported advanced oxidation processes removing tetracycline (TC) was also made. Our findings showed that the photo-Fenton process had good potential for antibiotic-containing waste water treatment. It provides a new method to deal with antibiotic pollution.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.