酸处理碳毡阴极增强电芬顿降解左氧氟沙星性能研究

Study on Acid-Treated Graphite Felt Cathodes for Enhanced Electro-Fenton Degradation of Levofloxacin

本文通过水热酸处理碳毡(GF),增加其亲水性和表面缺陷数量,增强了电芬顿降解抗生素左氧氟沙星(LEV)性能。采用SEM、XRD、XPS、Raman、FT-IR、接触角等测试技术对酸处理修饰的碳毡(MGF)进行了分析表征,结果表明MGF表面羧基含量和缺陷数量明显增加。在最优的反应条件下,电流0.15 A,pH为2,O_(2)曝气量为0.4 L/min,FeSO_(4)加入量为20 mg/L,该体系反应20 min后,LEV降解率达到96.1%,并且MGF表现出良好的稳定性,经过4个循环LVX降解率仍能达到95.4%。这项工作表明MGF是一种很有前途的电芬顿阴极材料,在水处理领域显示了优异的应用前景。

In this paper,the electro-Fenton degradation antibiotic levofloxacin(LEV)performance was enhanced by hydrothermal acid treatment of graphitic carbon felt(GF)to increase its hydrophilicity and the number of surface defects.The acid-treated modified graphitic carbon felt(MGF)was characterized using the SEM,XRD,XPS,Raman,FT-IR,contact angle and other testing techniques.The results showed that the carboxyl group contents and the number of defects on the surface of MGF were significantly increased.Under the optimal reaction condition with a current of 0.15 A,pH=2,O_(2) aeration of 0.4 L/min and FeSO_(4) addition of 20 mg/L,the LEV degradation efficiency reached 96.1%after reaction for 20 min.The MGF showed good stability,and the LEV degradation rate could still reach 95.4%after 4 cycles.This work indicated that the MGF is a promising electro-Fenton cathode material and shows excellent application prospects in the field of water treatment.