Nickel-doped red mud-based Prussian blue analogues heterogeneous activation of H2O2 for ciprofloxacin degradation: waste control by waste

被引：0
作者：
Liu S. [1 ,2 ]
Wang J. [1 ,2 ]
Liu Y. [1 ,2 ]
Yang B. [1 ,2 ]
Hong M. [1 ,2 ]
Yu S. [1 ,2 ]
Qiu G. [1 ,2 ]
机构：
[1] School of Minerals Processing and Bioengineering, Central South University, Hunan, Changsha
[2] Key Laboratory of Biohydrometallurgy, Ministry of Education, Central South University, Changsha
来源：
Environmental Science and Pollution Research | 2024年 / 31卷 / 27期
基金：
中国国家自然科学基金;
关键词：
Degradation pathways; Fenton-like; Metal organic framework; Reactive oxygen species; Red mud;
D O I：
10.1007/s11356-024-33794-w
中图分类号：
学科分类号：
摘要：
Red mud (RM) is a typical bulk solid waste with Fe/Al/Si/Ca-rich characteristics that has been used to prepare various heterogeneous catalysts such as iron-based catalysts and supported catalysts. Prussian blue analogues (PBA) is a low-cost, environmentally friendly, and active site rich iron-based metal organic framework, but its catalytic properties are adversely affected by their easy aggregation. In this study, nickel-doped RM-based PBA (RM-Ni PBA) was synthesized by acid dissolution-coprecipitation method for the degradation of ciprofloxacin (CIP). The characterization showed that RM-Ni PBA was a material with excellent dispersibility, large specific surface area, and abundant active sites. The degradation results showed that the removal efficiency of CIP in the RM-Ni PBA/H2O2 system was 16.63, 1.78, and 1.81 times that of RM, RM-PB, and Ni PBA, respectively. It was found that 1O2 was the main reactive oxygen species (ROS) dominated the degradation process, and its formation was accompanied by the mutual conversion of Ni(II)/Fe(II) and Ni(III)/Fe(III). Notably, the degradation process maintained a satisfactory efficiency over a wide pH range (3–9) and exhibited strong anti-interference ability against impurities such as Cl−, SO42−, and NO3−. The components and contents of RM-Ni PBA remained relatively stable during the degradation process. In addition, the degradation intermediates of CIP were identified, and possible degradation pathways were proposed. This study is expected to provide theoretical basis and technical guidance for the application of RM-based heterogeneous catalyst in the treatment of antibiotic wastewater. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.
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页码：39439 / 39453
页数：14
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