Cobalt-boron-doped graphitic biochar for enhanced ofloxacin removal and mineralization via non-radical-dominated advanced oxidation processes

IF 10 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Cleaner Production Pub Date : 2025-09-25 DOI:10.1016/j.jclepro.2025.146706

Jiali Cui , Yi Liang , Chaoneng Ning , Feng Zhang , Fengjie Liang , Jingyi Gao , Ziyi Mao

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引用次数: 0

Abstract

Designing efficient non-radical advanced oxidation processes (AOPs) with broad pH adaptability remains challenging. Here, non-precious cobalt and metalloid boron were incorporated into biochar via impregnation-pyrolysis to prepare CoB co-doped graphitic biochar (CoB-BC). This material aimed to enhance catalytic performance by leveraging cobalt's high oxidation potential for pH stability and boron-promoted graphitization for efficient electron transfer. In the CoB-BC/peroxymonosulfate (PMS) system, ofloxacin (OFX) was completely degraded (>99 %) with 92.78 % mineralization within 40 min via non-radical pathways (¹O₂ and electron transfer) across pH 3–11. EEM, full-spectrum scanning, PMS concentration and TOC measurements confirmed OFX degradation and mineralization. Electrochemical analyses confirmed the graphitic structure facilitated electron transfer and cobalt valence cycling. The system exhibited low ecotoxicity (using soybean sprouts) and was successfully integrated into a membrane (CoB-BC/MCE), demonstrating application potential. This work develops a wood-based biochar catalyst combining high efficiency, environmental compatibility, and operational versatility for contaminant degradation.

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钴硼掺杂石墨生物炭通过非自由基主导的高级氧化过程增强氧氟沙星去除和矿化

设计具有广泛pH适应性的高效非自由基高级氧化工艺（AOPs）仍然是一个挑战。本研究通过浸渍热解将非贵重钴和类金属硼掺入生物炭中，制备CoB共掺杂石墨生物炭（CoB- bc）。这种材料旨在通过利用钴的高氧化电位来提高pH稳定性和硼促进石墨化来提高电子转移的催化性能。在CoB-BC/过氧单硫酸盐（PMS）体系中，氧氟沙星（OFX）在pH 3-11范围内通过非自由基途径（1O2和电子转移）在40分钟内被完全降解（> 99%），矿化率为92.78%。EEM、全谱扫描、PMS浓度和TOC测量证实了OFX的降解和矿化。电化学分析证实石墨结构有利于电子转移和钴价循环。该系统具有低生态毒性（利用豆芽），并成功整合到膜（CoB-BC/MCE）中，显示出应用潜力。本研究开发了一种基于木材的生物炭催化剂，结合了高效、环境相容性和多功能性的污染物降解。

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来源期刊

Journal of Cleaner Production 环境科学-工程：环境

CiteScore

20.40

自引率

9.00%

发文量

4720

审稿时长

111 days

期刊介绍： The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.