Photodegradation of fluoroquinolone antibiotic gatifloxacin in aqueous solutions

• 来源期刊: 科学通报(英文版)
• 学科: 地球科学
• 关键词: 喹诺酮类抗生素 加替沙星 光降解 水溶液 氟 影响因素 降解机制 量子产率
• 年，卷（期）: 2010,（15）
• 所属期刊栏目: ARTICLES
• 页码范围: 1495-1500
• 页数: 6页
• 分类号: X703 TQ465
• 语种: 英文

摘要

Fluoroquinolone antibiotics (FQs) are frequently detected as emerging pollutants in aqueous environments.In this study,kinetics,influencing factors and mechanisms on the photodegradation of gatifloxacin,a representative FQ,were investigated.The photodegradation follows the pseudo-first-order kinetics.Gatifloxacin photodegrades with a quantum yield of (5.94 ± 0.95) × 10 3 in pure water and undergoes direct photolysis as well as self-sensitized photodegradation.The FQ photodegrades slower in freshwater and se...