原位产生并利用H2O2的新型类Fenton催化剂及去除废水中抗生素的机制

本项目拟研究一种原位产生并利用H2O2的新型类Fenton催化剂（Al-CNTs-Fe3O4），以克服传统Fenton法存在的不足，如H2O2不稳定导致其利用率低、运输和储存困难、反应要求pH较低等。主要研究内容包括：（1）制备一种能够原位产生H2O2并将其转化为·OH的新型类Fenton催化剂（Al-CNTs-Fe3O4），探讨其特性及机制；（2）构建一个新型类Fenton催化体系（Al-CNTs-Fe3O4/O2），用于去除废水中的磺胺类抗生素，探讨该体系对废水中抗生素的降解特性及去除机制；（3）采用基于密度泛函理论的计算化学方法，并结合实验检测到的中间降解产物，阐明抗生素的降解途径，探讨抗生素分子结构对其降解速率的影响规律，构建利用分子结构参数预测其降解速率的模型，用于预测抗生素在水环境中的降解特性。本项目研究成果可为开发高效去除废水中抗生素类污染物的新技术提供科学依据和技术。

The project will investigate a novel Fenton-like catalyst with in-situ generation and utilization of H2O2 (Al-CNTs-Fe3O4/O2) to overcome the main disadvantages of the conventional Fenton system, for example, the instability of H2O2 results in the inconveniences of transport and storage of H2O2 and the acidic pH conditions. The research contents include: (1) to prepare a new environmental catalytic materials (Al-CNTs-Fe3O4) by liquid phase chemical deposition-high energy ball milling-melting infiltration method, which can in-situ reduce O2 to H2O2 via micro electrolysis and generate ·OH species via Fenton-like process, to probe the performance and characteristics of the generation of H2O2 and ·OH; (2) to develop a novel Fenton-like system (Al-CNTs-Fe3O4/O2), and to apply it for the removal of sulfonamides antibiotics from simulated and practical wastewater, to investigate the characteristics and mechanisms of sulfonamides antibiotics degradation by Al-CNTs-Fe3O4/O2 system; (3) to explore the degradation pathway of antibiotics by using the calculation chemical method based on DFT theory, and combining with the possible intermediate products which were identified by the HPLC-MS analyses during the degradation process of the antibiotics, and to determine the influential regulation of the structure of antibiotics and its degradation rates, and to establish the prediction model, which can be sued for predicting the performance of a antibiotics degradation in the aquatic environment.This research proposal will provide the scientific foundation and technical support for developing a new technology for the removal of antibiotics contaminants from wastewater.