高级氧化技术 (advanced oxidation processes, AOPs) 因其具有产生强氧化性自由基的能力, 在降解有机污染物领域受到广泛关注. 然而, 由于传统的 Fenton 反应存在 pH 值适用范围窄 (2.8∼3.5) 和产生铁泥沉淀等缺点, 故通过 Al+酸+H₂O₂ 体系反应后经过滤得到含有高活性铝离子的羟基自由基滤液, 发现该体系可以有效降解水中的土霉素 (oxytetracycline, OTC). 研究了制备羟基自由基滤液所用 Al 粉体剂量、反应时间、H₂O₂ 浓度以及 pH 值等因素对降解水中土霉素的影响, 同时对滤液中羟基自由基产生的机理进行了分析.

Advanced oxidation processes (AOPs) are widely used to degrade organic pollutants in aqueous solutions due to their ability to generate highly reactive radicals. However, the traditional Fenton reaction is limited by its required pH range of 2.8∼3.5 and the formation of Fe sludge. This study presents a hydroxyl radical filtrate containing highly active aluminum ions, prepared by filtering the reaction suspension of an Al+acid+H₂O₂ system. The filtrate effectively degraded oxytetracycline (OTC) in aqueous solution. The effects of Al dosage, reaction time, H₂O₂ concentration, and pH of filtrate preparation on oxytetracycline degradation efficiency were systematically investigated. Additionally, the mechanism underlying hydroxyl radical generation in the filtrate was analyzed.