NDLI: Efficient Activation of Peroxymonosulfate by Biochar-Loaded Zero-Valent Copper for Enrofloxacin Degradation: Singlet Oxygen-Dominated Oxidation Process

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Efficient Activation of Peroxymonosulfate by Biochar-Loaded Zero-Valent Copper for Enrofloxacin Degradation: Singlet Oxygen-Dominated Oxidation Process

Content Provider	MDPI
Author	Zhao, Jiang Chen, Tianyin Hou, Cheng Huang, Baorong Du, Jiawen Liu, Nengqian Zhou, Xuefei Zhang, Yalei
Copyright Year	2022
Abstract	The removal of contaminants of emerging concern (CECs) has become a hot research topic in the field of environmental engineering in recent years. In this work, a simple pyrolysis method was designed to prepare a high-performance biochar-loaded zero-valent copper (CuC) material for the catalytic degradation of antibiotics ENR by PMS. The results showed that 10 mg/L of ENR was completely removed within 30 min at an initial pH of 3, CuC 0.3 g/L, and PMS 2 mmol/L. Further studies confirmed that the reactive oxygen species (ROS) involved in ENR degradation are ·OH, ${S O}_{4}^{-}$ ·, ¹O₂, and $O_{2}^{-}$ . Among them, ¹O₂ played a major role in degradation, whereas $O_{2}^{-}$ · played a key role in the indirect generation of ¹O₂. On the one hand, CuC adsorbed and activated PMS to generate ·OH, ${SO}_{4}^{-}$ · and $O_{2}^{-}$ ·. $O_{2}^{-}$ · was unstable and reacted rapidly with H₂O and ·OH to generate large amounts of ¹O₂. On the other hand, both the self-decomposition of PMS and direct activation of PMS by C=O on biochar also generated ¹O₂. Five byproducts were generated during degradation and eventually mineralized to CO₂, H₂O, ${N O}_{3}^{-}$ , and F⁻. This study provides a facile strategy and new insights into the biochar-loaded zero-valent transition-metal-catalyzed PMS degradation of CECs.
Starting Page	2842
e-ISSN	20794991
DOI	10.3390/nano12162842
Journal	Nanomaterials
Issue Number	16
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2022-08-18
Access Restriction	Open
Subject Keyword	Nanomaterials Environmental Engineering Peroxymonosulfate Biochar-loaded Zero-valent Copper Enrofloxacin Singlet Oxygen Superoxide Radical
Content Type	Text
Resource Type	Article

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