Details

Autor(en) / Beteiligte

• Xu, Zhenzhan
• Ma, Xiaolin
• He, Fengting
• Lu, Mingjie
• Zhang, Jinqiang
• Wang, Shuaijun
• Dong, Pei
• Zhao, Chaocheng

Titel

In situ generated iron oxide nanosheet on iron foam electrode for enhanced electro-Fenton performance toward pharmaceutical wastewater treatment

Ist Teil von

• Journal of hazardous materials, 2024-03, Vol.465, p.133193-133193, Article 133193

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2024

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Electro-Fenton (EF) is considered to be an effective technology for the purification of organic wastewater containing antibiotics, but the construction of accessible and efficient heterogeneous EF catalytic materials still faces challenges. In this study, an iron foam-derived electrode (FeOx/if-400) was prepared by a simple method (chemical oxidation combined heat treatment). The fabricated electrode presented great EF degradation efficiency under wide pH range (almost completely removing 50 mg L−1 TNZ within 60 min) and maintained great stability after consecutive operation (>95% removal after six cycles). Also, the FeOx/if-400 electrode showed good purification ability for pharmaceutical wastewater as evaluated by the quadrupole time-of-flight mass spectrometry and the three-dimensional excitation-emission matrix fluorescence spectroscopy. Based on experimental results, characterization analysis, and density functional theory (DFT) calculations, the EF reaction mechanism of FeOx/if-400 electrode and the organics degradation pathways in simulated and real matrices were proposed. Significantly, the biotoxicity assessment of the degradation intermediate products was revealed by ECOSAR software and relative inhibition of E. coli, which fully proved the environmental friendliness of the EF process by the FeOx/if-400 cathode. This work provides a green and effective EF system, showing a promising application potential in the field of organic wastewater treatment containing antibiotic contaminants. [Display omitted] •Fabrication of novel iron foam electrode with in situ generated iron oxide nanosheet.•Electrode had great EF activity for TNZ and pharmaceutical wastewater purification.•Decomposition process of TNZ and organics in real wastewater were revealed.•The free radical and non-free radical pathways all contribute to the EF process.•Biotoxicity was predicted to evaluate the environmental friendliness of EF system.