In this study, a heterogeneous catalyst derived from iron-containing waste mineral was enriched by magnetic composite (Fe³⁺/Fe²⁺) at modification ratio of 5 % for the highest mineralization of ofloxacin (OFL) by ozone/Fenton system. A comparative study between O₃, perozone (H₂O₂) and O₃/Fenton systems in mineralization of ofloxacin (OFL) under various solution pH, H₂O₂ dosages, initial OFL concentrations and catalyst (MFS-5) dosages was performed. Adding Fenton reagent (H₂O₂/MFS-5) into ozonation system gave the highest OFL removal efficiency of 70 % at optimal operational conditions of pH 9, catalyst dosage of 1.5 g/L, H₂O₂ dosage of 100 mg/L with initial OFL concentration of 100 mg/L due to synergistic effect of O₃ and Fenton reagent. The catalyst's properties were evaluated through BET, SEM image, EDS and mapping data, FTIR and XRD. The main mineralization mechanism of OFL was through hydroxyl radicals (^⁎OH) which were formed during ozonation process because FeO, Fe₃O₄ and SiO₂ in the MFS-5's constituent accelerated decomposition of O₃ and promoted reaction rate with H₂O₂. The catalyst exhibited a good reusability and stability after five consecutive runs with negligible change in mineralization efficiency of OFL and a very low leached iron amount into solution. Besides, there was an efficient improvement of biodegradability of real pharmaceutical wastewater after treatment by O₃/Fenton with 71 % and 62 % removal of COD and TOC, respectively. These findings indicated utilizing magnetic-modified waste iron mineral as heterogeneous catalyst in combination with H₂O₂ and O₃ achieved high efficiency and feasibility in removal of OFL antibiotic from real pharmaceutical wastewater.

在这项研究中，以含铁废矿物为原料，以5%的改性比对含铁废矿物的非均相催化剂进行富集，^以实现臭氧/芬顿体系对氧氟沙星（ ^{OFL ）的最高矿化。}在不同溶液 pH 值、H ₂ O ₂剂量、初始 OFL 浓度和催化剂 (MFS-5) 剂量下氧氟沙星 (OFL) 矿化过程中 O ₃、过氧带 (H ₂ O ₂ ) 和 O ₃ /Fenton 系统的比较研究是执行。添加芬顿试剂（H ₂ O _{2/MFS-5) 进入臭氧化系统时，在 pH 9、催化剂用量为 1.5 g/L、H 2} O ₂用量为 100 mg/L 和初始 OFL 浓度为 100 mg的最佳操作条件下，OFL 去除效率最高，为 70% /L 由于O ₃和芬顿试剂的协同作用。通过 BET、SEM 图像、EDS 和映射数据、FTIR 和 XRD 评估催化剂的性能。OFL的主要矿化机制是通过臭氧化过程中形成的羟基自由基（ ^⁎OH ），因为MFS-5成分中的FeO、Fe ₃ O ₄和SiO _{2加速了O 3}的分解并促进了与H ₂ O的反应速率。₂ . 该催化剂在连续运行五次后表现出良好的可重复使用性和稳定性，OFL 的矿化效率变化可忽略不计，并且浸出到溶液中的铁量非常低。_{此外，经O 3} /Fenton处理后，实际制药废水的生物降解性得到有效提高，COD 和 TOC 的去除率分别为 71 % 和 62 %。这些发现表明，利用磁性改性废铁矿物作为非均相催化剂与 H ₂ O ₂和 O ₃相结合，在从实际制药废水中去除 OFL 抗生素方面取得了高效率和可行性。