抗生素在水环境中的光化学行为

Progress in studies on aqueous environmental photochemical behavior of antibiotics

抗生素是在水环境中广泛存在的一类新兴污染物,近年来,由于其"假"持久性并能引起环境菌群的抗药性而备受关注.光化学降解是水环境中抗生素类污染物的重要消减方式.本文总结了水环境中抗生素光化学行为研究的最新进展,介绍了抗生素的直接、间接和自敏化光解动力学,评述了pH和水中溶解性物质对抗生素光解的影响及典型抗生素的光降解路径与机理,讨论了抗生素的光致毒性,最后对抗生素在水环境中光化学行为的研究进行了展望.

Antibiotics are emerging pollutants that are ubiquitous in the aqueous environment. They have recently received increasing concerns due to their pseudo-persistence and potential to induce bacterial resistance. Photochemical degradation is a central factor in determining the fate of antibiotics. This paper reviews the current research progress on the aqueous environmental photochemical behavior of antibiotics. Their direct, indirect and self-sensitized photodegradation kinetics are introduced. The effects of pH and aqueous dissolved matter on the photodegradation kinetics of antibiotics are highlighted, and the photodegradation pathways and mechanisms are summarized for some important antibiotic classes. Furthermore, the photoinduced toxicities of some antibiotics are discussed. Finally, the research prospects about the aqueous photochemical behavior of antibiotics are proposed.