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可重复使用的FeO/SBA15纳米复合材料作为去除磺胺甲恶唑和橙黄II的高效光芬顿催化剂

Reusable FeO/SBA15 Nanocomposite as an Efficient Photo-Fenton Catalyst for the Removal of Sulfamethoxazole and Orange II.

作者信息

González-Rodríguez Jorge, Fernández Lucía, Vargas-Osorio Zulema, Vázquez-Vázquez Carlos, Piñeiro Yolanda, Rivas José, Feijoo Gumersindo, Moreira Maria Teresa

机构信息

CRETUS Institute, Department of Chemical Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.

Laboratory of Magnetism and Nanotechnology, Departments of Physical Chemistry, Faculty of Chemistry and Applied Physics, Faculty of Physics, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.

出版信息

Nanomaterials (Basel). 2021 Feb 19;11(2):533. doi: 10.3390/nano11020533.

DOI:10.3390/nano11020533
PMID:33669767
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7922933/
Abstract

Today, the presence of recalcitrant pollutants in wastewater, such as pharmaceuticals or other organic compounds, is one of the main obstacles to the widespread implementation of water reuse. In this context, the development of innovative processes for their removal becomes necessary to guarantee effluent quality. This work presents the potentiality of magnetic nanoparticles immobilized on SBA-15 mesoporous silica as Fenton and photo-Fenton catalysts under visible light irradiation. The influence of the characteristics of the compounds and nanoparticles on the removal yield was investigated. Once the key aspects of the reaction mechanism were analyzed, to evaluate the feasibility of this process, an azo dye (Orange II) and an antibiotic (sulfamethoxazole) were selected as main target compounds. The concentration of Orange II decreased below the detection limit after two hours of reaction, with mineralization values of 60%. In addition, repeated sequential experiments revealed the recoverability and stability of the nanoparticles in a small-scale reactor. The benchmarking of the obtained results showed a significant improvement of the process using visible light in terms of kinetic performance, comparing the results to the Fenton process conducted at dark. Reusability, yield and easy separation of the catalyst are its main advantages for the industrial application of this process.

摘要

如今，废水中存在难降解污染物，如药物或其他有机化合物，是广泛实施水回用的主要障碍之一。在此背景下，开发去除这些污染物的创新工艺对于保证出水水质变得十分必要。本文介绍了负载在SBA - 15介孔二氧化硅上的磁性纳米颗粒作为可见光照射下的芬顿和光芬顿催化剂的潜力。研究了化合物和纳米颗粒的特性对去除率的影响。在分析了反应机理的关键方面后，为评估该工艺的可行性，选择了一种偶氮染料（橙黄Ⅱ）和一种抗生素（磺胺甲恶唑）作为主要目标化合物。反应两小时后，橙黄Ⅱ的浓度降至检测限以下，矿化率达60%。此外，重复的连续实验表明纳米颗粒在小型反应器中具有可回收性和稳定性。将所得结果与黑暗条件下进行的芬顿工艺结果进行比较，基准测试表明使用可见光的该工艺在动力学性能方面有显著改进。催化剂的可重复使用性、产率和易于分离是该工艺在工业应用中的主要优势。

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