纳米Fe/Co催化降解土霉素效果及影响因素研究

为探究液相还原法制备的纳米Fe/Co催化剂的类芬顿催化效果，以单因素分析法研究了pH、OTC（土霉素）初始质量浓度、H₂O₂摩尔浓度和催化剂用量对纳米Fe/Co催化剂催化性能的影响，并通过SEM（扫描电子显微镜）和BET（比表面积测试仪）对纳米Fe/Co催化剂进行表征，进一步研究了纳米Fe/Co催化剂对OTC模拟废水的催化降解效果.结果表明:①纳米Fe/Co催化剂可以有效地改善催化体系的pH使用范围，在pH为3.0~11.0范围内，纳米Fe/Co催化剂对浓度为100 mg/L OTC的去除率（94.0%）高于纳米Fe催化剂（85.0%）；低浓度OTC有利于提高污染物的去除率，而高浓度的OTC有利于提高反应速率；H₂O₂摩尔浓度为200 mmol/L时，纳米Fe/Co催化剂对OTC的去除率最高（93.8%）；纳米Fe/Co催化剂用量为6 g/L时，其对OTC的去除率最高（92.8%）.②纳米Fe/Co催化剂粒径为20~30 nm，比表面积较高，为121.3 m2/g.③纳米Fe/Co催化剂在重复利用13次后OTC去除率仍在50.0%以上，其重复利用性能良好.研究显示，纳米Fe/Co催化剂对OTC废水具有较好的催化性能、重复利用性能以及较宽的pH使用范围，可为含抗生素废水处理提供理论支撑. 

Oxidative Degradation of Oxytetracycline Using Nano Fe/Co Catalyst and H2O2 under Fenton Conditions

In order to study the Fenton-like catalytic effect of Nano Fe/Co catalyst prepared by liquid phase reduction method, the effects of the initial pH value of the catalytic reaction, the initial concentration of oxytetracycline (OTC), the amount of H₂O₂ and the amount of catalyst on the catalytic performance of the Nano Fe/Co catalyst were studied by single factor analysis. Then, SEM (scanning electron microscope) and BET (brunauer emmett teller) were used to characterize the Nano Fe/Co catalyst and study the catalytic degradation of simulated OTC wastewater by the Nano Fe/Co catalyst. The results showed that:(1) The Nano Fe/Co catalyst could effectively widen the pH range of catalytic system. When the pH was between 3.0 and 11.0, the removal rate of 100 mg/L OTC (94.0%) by Nano Fe/Co catalyst was better than that of nanometer Fe catalyst (85.0%). Low OTC concentration was beneficial to improve the removal rate of pollutants, while high OTC concentration was conducive to raising reaction rate. When H₂O₂ dosage was increased to 200 mmol/L, the Nano Fe/Co catalyst achieved the optimal removal rate of OTC (93.8%). When the dosage of Nano Fe/Co catalyst reached 6 g/L, the catalyst achieved the optimal removal rate of OTC (92.8%). (2) The particle size of the Nano Fe/Co catalyst is 20-30 nm, and the specific surface area is 121.3 m²/g. (3) When the Nano Fe/Co catalyst was reused for 13 times, its OTC removal rate reached more than 50.0%, showing its good reusability. The study found that the Nano Fe/Co catalyst had high catalytic performance and reusability for OTC wastewater, which could expand the range of reaction pH and provide theoretical support for the treatment of wastewater containing antibiotics.