Antibiotics are a new class of organic compounds that have antibacterial and anti-inflammatory effects in the clinic, but their widespread use has serious adverse effects on the natural water environment. Sulfadiazine (SDZ) is a typical kind of antibiotic, and the treatment effect of the traditional biochemical degradation process has not been ideal. Thus, in order to find a more efficient and clean degradation method, we investigated the degradation effect of ozone/persulfate (O₃/PMS) advanced oxidation process (AOPs) on SDZ in prepared water and natural water for the first time and compared it with the experimental results of ozone (O₃) and ozone/ultraviolet (O₃/UV) methods. The experimental results showed that when the initial mass concentration of O₃ was 3 mg/L, the initial mass concentration of SDZ was 10 mg/L, the temperature was 25 °C, the pH was 6.8 ± 0.1, the K_obs of O₃/PMS was 0.2497 min⁻¹, and the K_obs values of O₃ and O₃/UV were 0.1242 and 0.1328 min⁻¹, respectively. The time required for O₃/PMS to degrade SDZ below the detection limit (0.01 mg/L) was about 7 min shorter than that of O₃ and O₃/UV. It was found that in O₃/PMS, the increase in the initial mass concentration of SDZ inhibited its degradation, and the increase in the initial mass concentration of ozone increased the degradation rate of sulfadiazine. The degradation process conformed to the pseudo-first-order reaction kinetic equation. O₃/PMS was suitable for weak alkaline environments. When pH was 9, the concentration of free radicals was the highest. Excessive alkalinity led to mutual quenching of free radicals and reduced the degradation rate. The mineralization effect of O₃/PMS was slightly worse than that of the O₃/UV process, but O₃/PMS effectively degraded SDZ and fluorescent substances dissolved in water, with good prospects in practical engineering applications.

中文翻译：

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臭氧/过硫酸盐高级氧化工艺对水中磺胺嘧啶的降解效率分析

抗生素是一类在临床上具有抗菌、抗炎作用的新型有机化合物，但其广泛使用对天然水环境产生了严重的不良影响。磺胺嘧啶（SDZ）是一种典型的抗生素，传统的生化降解工艺处理效果一直不理想。因此，为了寻找一种更高效、更清洁的降解方法，我们首次研究了臭氧/过硫酸盐（O ₃ /PMS）高级氧化工艺（AOPs）对制备水和天然水中SDZ的降解效果，并进行了比较。与臭氧（O ₃）和臭氧/紫外线（O ₃ /UV）方法的实验结果。实验结果表明，当 O 的初始质量浓度₃为3 mg/L，SDZ的初始质量浓度为10 mg/L，温度为25℃，pH为6.8±0.1，O _{3 /PMS的K obs}为0.2497 min ^-1，K O ₃和O _{3 /UV的obs}值分别为0.1242和0.1328 min ^-1。O ₃ /PMS 降解 SDZ 低于检测限（0.01 mg/L）所需的时间比 O ₃和 O ₃ /UV 的时间短约 7 分钟。发现在 O ₃/PMS，SDZ初始质量浓度的增加抑制了其降解，臭氧初始质量浓度的增加增加了磺胺嘧啶的降解速率。降解过程符合准一级反应动力学方程。O ₃ /PMS 适用于弱碱性环境。当pH为9时，自由基浓度最高。碱度过高导致自由基相互猝灭，降低了降解速率。_{O 3} /PMS的矿化效果略逊于O ₃ /UV工艺，但O ₃ /PMS有效降解溶解在水中的SDZ和荧光物质，在实际工程应用中具有良好的前景。