Charcoal-based block catalyst boosts peroxymonosulfate activation for ciprofloxacin degradation

IF 8.1 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Yuwei Li , Chengfeng Zhou , Xiaohan Zhang , Bin Hui
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Abstract

Developing high-performance and low-cost heterogeneous catalyst is an urgent need to activate peroxymonosulfate (PMS) towards organic pollutants degradation. Herein, a novel block catalyst comprising of iron oxide nanosheets and wood carbon (FeOX@WC) is proposed to enhance PMS activation for ciprofloxacin (CIP) degradation. The resultant FeOX@WC achieved the removal rate of 86.6% in 10 min. This hardwood-derived catalyst remained the excellent degradation performance in a wide pH range of 2.0–11.0 and the co-existence of other organic pollutants. Inspired by water circulation pathway in tree, a flowthrough degradation device was constructed via using the hardwood-derived carbon block with large vessel channels and small fiber tracheids channels in diameter. The removal rate reached 75.4% in 17 min for mass pollution solution (450 mL), suggesting the good degradation ability in practical application. Quenching experiments, electron paramagnetic resonance and electrochemical analysis reveal that non-radical pathways including singlet oxygen and electron transfer occupy the dominant effect. Nine intermediates were identified and three kinds of degradation pathways were proposed. This work provides a charcoal-based block catalyst to enhance the degradation efficiency towards aqueous CIP pollutants.

Abstract Image

炭基嵌段催化剂促进过氧单硫酸盐活化降解环丙沙星
开发高性能、低成本的多相催化剂是激活过氧单硫酸根(PMS)降解有机污染物的迫切需要。本文提出了一种由氧化铁纳米片和木碳(FeOX@WC)组成的新型嵌段催化剂,以增强PMS对环丙沙星(CIP)降解的活化作用。所得FeOX@WC在10 min内的去除率达到86.6%。该硬木衍生催化剂在2.0-11.0的宽pH范围内以及与其他有机污染物共存的情况下仍保持了优异的降解性能。受树木水循环途径的启发,采用具有大血管通道和小直径纤维管状通道的硬木源碳块构建了一种直流式降解装置。对于质量污染溶液(450 mL), 17 min的去除率达到75.4%,具有良好的降解能力。猝灭实验、电子顺磁共振和电化学分析表明,单线态氧和电子转移等非自由基途径占主导作用。鉴定出9种中间体,并提出了3种降解途径。本研究提供了一种炭基嵌段催化剂,以提高对含水CIP污染物的降解效率。
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来源期刊
Separation and Purification Technology
Separation and Purification Technology 工程技术-工程:化工
CiteScore
14.00
自引率
12.80%
发文量
2347
审稿时长
43 days
期刊介绍: Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.
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阿拉丁
Boric acid (H3BO3)
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p-benzoquinone (BQ)
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tert-butanol
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Furfuryl alcohol (FFA)
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