Flow-through heterogeneous electro-Fenton system using a bifunctional FeOCl/carbon cloth/activated carbon fiber cathode for efficient degradation of trimethoprim at neutral pH

被引:17
作者
Song, Yongjun [1 ]
Wang, Aimin [1 ]
Ren, Songyu [1 ]
Zhang, Yanyu [1 ]
Zhang, Zhongguo [2 ]
机构
[1] Beijing Jiaotong Univ, Sch Environm, Beijing Key Lab Aqueous Typ Pollutants Control & W, Beijing, Peoples R China
[2] Beijing Acad Sci & Technol, Inst Resources & Environm, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
Heterogeneous electro-Fenton; Flow-through reactor; FeOCl; CC; ACF cathode; Trimethoprim; Mineralization; OXIDATION REACTION; SULFAMETHOXAZOLE; TRANSFORMATION; CATALYST; MINERALIZATION; PERFORMANCE; REMOVAL; HYBRID; ACID;
D O I
10.1016/j.envres.2023.115303
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The synthesis of multifunctional cathode with high-efficiency and stable catalytic activity for simultaneously producing and activating H2O2 is an effective way for promoting the performance of heterogeneous electro-Fenton process (HEF). In addition, accelerating mass transfer by adopting a flow-through reactor is also great importance because of its better utilization of catalysts and adequate contact of the contaminant with the oxi-dants generated on the electrode surface. Herein, a novel flow-through HEF (FHEF) system was designed for the degradation of trimethoprim (TMP) using bifunctional cathode with a sandwich structure FeOCl nanosheets loaded onto carbon cloth (CC) and activated carbon fiber (ACF) (FeOCl/CC/ACF). The cathode exhibited excellent performance in activating H2O2 for the in-situ generation of hydroxyl radicals (center dot OH). The electron spin resonance (ESR) measurements and radical quenching tests proved that the high production of center dot OH in the FHEF process was favorable to the high catalytic efficiency. 25 mg L-1 TMP was entirely degraded after 60 min, with the TOC removal of 62.6% (180 min) at pH 6.8, 9.0 mA cm-2, and flux rate 210 mL min-1. Moreover, the degradation rate still could reach 83% (60 min) after 10 cycles without obvious valence and crystal phase changes. Simultaneously, the current utilization rate has also been greatly enhanced, with an average current efficiency of 69.9% and a low energy consumption of 0.28 kWh kg-1. The reasonable degradation pathways for TMP were proposed based on the UPLC-QTOF-MS/MS results. Finally, the results of toxicological simulation showed a declining trend in the toxicity of the samples during TMP degradation. These results claim that the FeOCl/CC/ACF-FHEF system is an efficient and economical technology for the treatment of organic contami-nants in effluents.
引用
收藏
页数:11
相关论文
共 67 条
[1]  
Ali B., 2019, ADV FEEDSTOCK CONVER, P221, DOI [10.1016/b978-0-12-817937-6.00012-6, DOI 10.1016/B978-0-12-817937-6.00012-6]
[2]   A comprehensive insight into a rapid degradation of sulfamethoxazole by peroxymonosulfate enhanced UV-A LED/g-C3N4 photocatalysis [J].
Ao, Xiuwei ;
Li, Zifu ;
Zhang, Hao .
JOURNAL OF CLEANER PRODUCTION, 2022, 356
[3]   Efficient degradation of tetracycline by H2O2 catalyzed by FeOCl: A wide range of pH values from 3 to 7 [J].
Cao, Yong ;
Cui, Kangping ;
Chen, Yihan ;
Cui, Minshu ;
Li, Guanghong ;
Li, Dong ;
Yang, Xiaojun .
SOLID STATE SCIENCES, 2021, 113
[4]   Where should Fenton go for the degradation of refractory organic contaminants in wastewater? [J].
Chen, Qi ;
Lu, Fan ;
Zhang, Hua ;
He, Pinjing .
WATER RESEARCH, 2023, 229
[5]   Flow-through integration of FeOCl/graphite felt-based heterogeneous electro-Fenton and Ti4O7-based anodic oxidation for efficient contaminant degradation [J].
Cui, Lele ;
Sun, Mingming ;
Zhang, Zhenghua .
CHEMICAL ENGINEERING JOURNAL, 2022, 450
[6]   Carbon nanotube filter functionalized with MIL-101(Fe) for enhanced flow-through electro-Fenton [J].
Dai, Yuling ;
Yao, Yuan ;
Li, Mohua ;
Fang, Xiaofeng ;
Shen, Chensi ;
Li, Fang ;
Liu, Yanbiao .
ENVIRONMENTAL RESEARCH, 2022, 204
[7]   Effect of soft template variation on the synthesis, physical, and electrochemical properties of Mn3O4nanomaterial [J].
Danish, Muhammad ;
Tayyab, Muhammad ;
Akhtar, Arusa ;
Altaf, Ataf Ali ;
Kausar, Samia ;
Ullah, Shafiq ;
Iqbal, Muhammad .
INORGANIC AND NANO-METAL CHEMISTRY, 2020, 51 (03) :359-365
[8]   Electro-Fenton approach in oxidative degradation of dimethyl phthalate - The treatment of aqueous leachate from landfills [J].
Dolatabadi, Maryam ;
Swiergosz, Tomasz ;
Ahmadzadeh, Saeid .
SCIENCE OF THE TOTAL ENVIRONMENT, 2021, 772
[9]   One-pot synthesis of graphene hydrogel/M (M: Cu, Co, Ni) nanocomposites as cathodes for electrochemical removal of rifampicin from polluted water [J].
Ebratkhahan, Masoud ;
Zarei, Mahmoud ;
Akpinar, Ibtihel Zaier ;
Metin, Onder .
ENVIRONMENTAL RESEARCH, 2022, 214
[10]   Degradation of trans-ferulic acid in acidic aqueous medium by anodic oxidation, electro-Fenton and photoelectro-Fenton [J].
Flores, Nelly ;
Sires, Ignasi ;
Antonio Garrido, Jose ;
Centellas, Francesc ;
Maria Rodriguez, Rosa ;
Lluis Cabot, Pere ;
Brillas, Enric .
JOURNAL OF HAZARDOUS MATERIALS, 2016, 319 :3-12