期刊
CHEMICAL ENGINEERING JOURNAL
卷 450, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.138263
关键词
Electro-Fenton; Anodic oxidation; Sub-stoichiometric titanium oxide; H2O2 diffusion; H2O2 decomposition
资金
- National Natural Science Foundation of China [52170041]
- Committee of Science and Technology Innovation of Shenzhen [JCYJ20190813163401660]
- Tsinghua SIGS Start-up Funding [QD2020002N]
A paired heterogeneous EF-AO flow-through system was constructed to rapidly degrade OTC. The system eliminated the need for H2O2 diffusion and demonstrated significantly enhanced center dot OH utilization.
Improvement to the synergistic performance of cathodic electro-Fenton (EF) and anodic oxidation (AO) has been severely restricted by the tendency for ineffective decomposition of cathode-produced H2O2 at the non-active anode and poor center dot OH utilization. Herein, a paired heterogeneous EF-AO flow-through system, consisting of an FeOCl-deposited graphite felt (FeOCl/GF) cathode and a Ti4O7 membrane anode, was constructed for rapid degradation of oxytetracycline (OTC). The real-time spatiotemporal distribution of H2O2 was systematically investigated and results revealed that the necessity for H2O2 diffusion was eliminating in the proposed system, thus contributing a 2.66-fold increase with respect to OTC degradation kinetics compared to the conventional homogeneous EF-AO system. Meanwhile, the flow-through configuration demonstrated significantly enhanced center dot OH utilization with a 6.65-fold increase in the OTC degradation rate constant compared to the batch mode system. In addition, the EF-AO flow-through system demonstrated a high OTC degradation rate (> 80 %) over a wide pH range from 3 to 7 and with different real water matrices. This work opens new avenues for advanced treatment of refractory wastewater using electrochemical advanced oxidation processes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据