Photodegradation of fluoroquinolone antibiotic gatifloxacin in aqueous solutions

被引：38

作者：

Ge LinKe ^{[1
]}

Chen JingWen ^{[1
]}

Zhang SiYu ^{[1
]}

Cai XiYun ^{[1
]}

Wang Zhuang ^{[1
]}

Wang ChunLing ^{[1
]}

机构：

[1] Dalian Univ Technol, Key Lab Ind Ecol & Environm Engn MOE, Dept Environm Sci & Technol, Dalian 116024, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2010年 / 55卷 / 15期

基金：

中国国家自然科学基金;

关键词：

gatifloxacin; photodegradation; influencing factors; reactive oxygen species; SEWAGE-TREATMENT PLANTS; ANTIBACTERIAL AGENTS; AQUATIC SYSTEMS; RISK-ASSESSMENT; ORGANIC-MATTER; PEARL RIVER; WASTE-WATER; SOUTH CHINA; PHOTOLYSIS; NITRATE;

D O I：

10.1007/s11434-010-3139-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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) x 10(-3) in pure water and undergoes direct photolysis as well as self-sensitized photodegradation. The FQ photodegrades slower in freshwater and seawater than in pure water, which is attributed to the integrative effects of pH and the aqueous dissolved matter (e.g., humic acids and NO(3)(-)) on the photodegradation. A toxicity test using Vibrio fischeri revealed the formation of hazardous photo-products.

引用

页码：1495 / 1500

页数：6

共 38 条

[1] Photosensitizing potential of ciprofloxacin at ambient level of UV radiation [J].