In this study, free active chlorine (HOCl/OCl^-, FAC) was employed as an activator of ozone (O₃) to remove typical non-steroidal anti-inflammatory drugs of aspirin (ASA) and phenacetin (PNT). The combination of FAC and O₃ significantly improved the removal of pollutants. O₃ molecules, hydroxyl radicals (OH) and reactive chlorine species (RCS) contributed to the removal of target contaminants in O₃/FAC system. By fitting the pollutant removal pattern with the experiment and model, the contribution of each oxidative species in O₃/FAC system was measured. The average removal contribution of O₃, OH, and RCS to ASA/PNT was 10.3%/8.4%, 53.8%/10.5%, and 35.9%/81.1%, respectively. Compared with O₃ alone system, the average mineralization of pollutant in O₃/FAC system increased from 20.6% to 34.0%. The formation of five typical CX₃R-type disinfection by-products (DBPs) was evaluated with post-chlorine system. The maximum concentration of total DBPs was achieved at pH 6.0 of 12.5 μM, in which trichloromethane (TCMs) was the main component (accounting for 55.3%). This study provides a new method to remove contaminants based on the combination of O₃ and FAC disinfectants.

在这项研究中，游离活性氯（次氯酸/ OCL ^-，FAC）作为臭氧的活化剂（O ₃），以除去阿斯匹林（ASA）和非那西丁（PNT）的典型的非甾体类抗炎药。FAC和O ₃的组合显着改善了污染物的去除。O ₃分子，羟基自由基（OH）和反应性氯物种（RCS）有助于去除O ₃ / FAC系统中的目标污染物。通过与实验和模型相适应的污染物去除模式，测量了O ₃ / FAC系统中每种氧化性物质的贡献。O ₃的平均去除贡献，相对于ASA / PNT的OH和RCS分别为10.3％/ 8.4％，53.8％/ 10.5％和35.9％/ 81.1％。带O相比₃单独系统，污染物在O平均矿化₃ / FAC系统从20.6％提高到34.0％。用后氯系统评估了五种典型的CX ₃ R型消毒副产物（DBP）的形成。pH值为12.5μM时，DBP的最大浓度达到最大值，其中三氯甲烷（TCMs）为主要成分（占55.3％）。这项研究提供了一种基于O ₃和FAC消毒剂去除污染物的新方法。