Tian Lin, Wang Liting, Wei Shikun, Zhang Liwen, Dong Deming, Guo Zhiyong
Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun, 130012, China.
Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun, 130012, China; School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu, Sichuan, 610031, China.
Environ Res. 2024 Jun 15;251(Pt 1):118650. doi: 10.1016/j.envres.2024.118650. Epub 2024 Mar 6.
The ferrihydrite-catalyzed heterogeneous photo-Fenton reaction shows great potential for environmental remediation of fluoroquinolone (FQs) antibiotics. The degradation of enoxacin, a model of FQ antibiotics, was studied by a batch experiment and theoretical calculation. The results revealed that the degradation efficiency of enoxacin reached 89.7% at pH 3. The hydroxyl radical (∙OH) had a significant impact on the degradation process, with a cumulative concentration of 43.9 μmol L at pH 3. Photogenerated holes and electrons participated in the generation of ∙OH. Eleven degradation products of enoxacin were identified, with the main degradation pathways being defluorination, quinolone ring and piperazine ring cleavage and oxidation. These findings indicate that the ferrihydrite-catalyzed photo-Fenton process is a valid way for treating water contaminated with FQ antibiotics.
水铁矿催化的非均相光芬顿反应在环境修复氟喹诺酮（FQs）抗生素方面显示出巨大潜力。通过批量实验和理论计算研究了作为FQ抗生素模型的依诺沙星的降解情况。结果表明，在pH值为3时，依诺沙星的降解效率达到89.7%。羟基自由基（∙OH）对降解过程有显著影响，在pH值为3时其累积浓度为43.9 μmol/L。光生空穴和电子参与了∙OH的生成。鉴定出了依诺沙星的11种降解产物，主要降解途径为脱氟、喹诺酮环和哌嗪环裂解及氧化。这些发现表明，水铁矿催化的光芬顿过程是处理受FQ抗生素污染水的有效方法。
