Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China.
J Environ Sci (China). 2012;24(4):743-9. doi: 10.1016/s1001-0742(11)60814-0.
Photodegradation of Norfloxacin in aqueous solution containing algae under a medium pressure mercury lamp (15 W, lambda(max) = 365 nm) was investigated. Results indicated that the photodegradation of Norfloxacin could be induced by the algae in the heterogeneous algae-water systems. The photodegradation rate of Norfloxacin increased with increasing algae concentration, and was greatly influenced by the temperature and pH of solution. Meanwhile, the cooperation action of algae and Fe(III), and the ultrasound were beneficial to photodegradation of Norfloxacin. The degradation kinetics of Norfloxacin was found to follow the pseudo zero-order reaction in the suspension of algae. In addition, we discussed the photodegradation mechanism of Norfloxacin in the suspension of algae. This work will be helpful for understanding the photochemical degradation of antibiotics in aqueous environment in the presence of algae, for providing a new method to deal with antibiotics pollution.
在中压汞灯（15 W，lambda(max) = 365 nm）照射下，研究了含藻水中诺氟沙星的光降解情况。结果表明，藻类可以在非均相藻类-水体系中诱导诺氟沙星的光降解。诺氟沙星的光降解速率随着藻类浓度的增加而增加，并受到溶液温度和 pH 值的显著影响。同时，藻类和 Fe(III)的协同作用以及超声有利于诺氟沙星的光降解。在藻类悬浮液中，诺氟沙星的降解动力学符合准零级反应。此外，我们还探讨了藻类悬浮液中诺氟沙星的光降解机制。这项工作将有助于了解藻类存在时水中抗生素的光化学降解，为处理抗生素污染提供了一种新方法。
