自产H2O2的光-类芬顿体系去除畜禽废水中抗生素的效能和机制研究

抗生素污染已对生态环境及人体健康产生了严重危害。外源补充H2O2的类芬顿技术因其成本高、催化性能有限而在有机废水治理中受到极大限制。通过结合光催化产H2O2与类芬顿过程构建出自产H2O2的光-类芬顿催化技术在有机废水治理中展现出广阔的应用前景。本项目拟将三维多孔结构的g-C3N4纳米片（3D g-C3N4）和磁性MnFe2O4纳米颗粒进行复合，通过优化制备条件获得高效的S型MnFe2O4/3D g-C3N4异质结催化剂材料。基于该异质结材料构建出自产H2O2的非均相光-类芬顿催化体系，并应用于畜禽废水中抗生素污染的去除研究。通过静态模拟废水实验及动态实际废水连续处理实验考察该催化体系对抗生素的去除效能。通过实验检测、技术表征及理论计算深入分析该催化体系自产H2O2及去除抗生素的内在过程及机制。本研究有望为发展一种绿色经济高效的废水中抗生素污染治理方法提供理论依据及实践参考。

The antibiotic pollution has caused serious harm to the ecological environment and human health. The Fenton-like technology need be supplemented with H2O2 reagent is greatly limited in the treatment of organic wastewater due to its high cost and limited catalytic performance. The photo-Fenton-like catalytic technology based on in-situ H2O2 production by combining photocatalytic H2O2 production with Fenton-like process has shown a broad application prospect in organic wastewater treatment. Herein, the efficient S-Scheme MnFe2O4/3D g-C3N4 heterojunction composite have been prepared firstly. Then, a heterogeneous photo-Fenton-like catalytic system based on in situ H2O2 production has been built by using the composite, and applied it for the removal of antibiotic pollution from livestock wastewater. The removal efficiency of antibiotic was investigated by static experiments of simulation wastewater and dynamic continuous removal experiments of actual wastewater. The internal process and mechanism of the H2O2 production and the removal of antibiotics in this catalytic system were analyzed through experimental detection, technical characterization and theory calculation. This study is expected to provide theoretical basis and practical reference for the development of an environment-friendly, economical and efficient method for the treatment of antibiotic contaminated wastewater.