High performance of heterogeneous catalytic ozonation for tetracycline removal by a N-doped biochar derived from co-pyrolysis of sludge and water hyacinth

IF 3.8 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2024-10-16 DOI:10.1016/j.cep.2024.110031

Huanxin Zhao , Mingyi Lv , Xiaoyuan Shang , Yuqi Liu , Huixin Yu

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Abstract

Enhancing the performance of heterogeneous catalytic ozonation (HCO) for contaminant removal using biochar that is both cost-effective and stable is of great significance. In this research, a novel nitrogen-doped biochar (HSBC) was synthesized through the co-pyrolysis of sludge and water hyacinth. The presence of pyrrolic N, pyridinic N and graphitic N in HSBC as well as the high-temperature co-pyrolysis process, conferred a high degree of graphitization to the biochar. The graphitic N species facilitated the generation of free radicals, while the graphitic structure enhanced electron transfer between the catalyst and tetracycline (TC). HSBC demonstrated exceptional efficiency in TC removal via HCO, achieving a 93% removal rate within just 130 min. Moreover, the biodegradability of actual printing and dyeing wastewater with a chemical oxygen demand (COD) of (9900 mg/L) was increased sevenfold after HCO treatment. This study offers new perspectives on the preparation of N-doped biochar and its practical application in the treatment of industrial wastewater through HCO processes.

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利用污泥和布袋莲共同热解产生的掺杂 N 的生物炭实现异相催化臭氧去除四环素的高性能化

利用既经济又稳定的生物炭提高异相催化臭氧（HCO）去除污染物的性能具有重要意义。本研究通过对污泥和布袋莲进行共热解，合成了一种新型掺氮生物炭（HSBC）。HSBC 中含有吡咯烷酮氮、吡啶酮氮和石墨氮，加上高温共热解过程，使生物炭高度石墨化。石墨化 N 物种促进了自由基的生成，而石墨结构则增强了催化剂与四环素（TC）之间的电子转移。HSBC 通过 HCO 去除四环素的效率极高，在短短 130 分钟内就达到了 93% 的去除率。此外，经过 HCO 处理后，化学需氧量（COD）为 9900 mg/L 的实际印染废水的生物降解能力提高了七倍。这项研究为掺杂 N 的生物炭的制备及其在通过 HCO 工艺处理工业废水中的实际应用提供了新的视角。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.