摘要
环境中常检出四类抗生素,即磺胺类、大环内酯类、喹诺酮类和四环素类.这些抗生素在环境中会进一步转化、消解,其中,光降解是非常重要的一种转化方式.抗生素的光降解过程复杂,分为直接光降解、间接光降解和自敏化光降解.不同光降解方式的机理不同,且环境水体的pH、DOM、无机离子、光照强度也都会影响抗生素的光降解过程.对抗生素的光降解动力学、影响因素、降解机制进行了介绍及分析,以期为抗生素的生态风险评估和环境质量基准的制定提供依据.
Abstract
The four types of antibiotics that are commonly detected in the environment are sulfonamides,macrolides,quinolones,and tetracy-clines.These antibiotics will further transform and disintegrate in the environment,among which photodegradation is a very important transfor-mation method.The photodegradation process of antibiotics is complex,divided into direct photodegradation,indirect photodegradation,and self-sensitized photodegradation.The mechanisms of different photodegradation methods are different,and factors such as pH,DOM,inorgan-ic ions,and light intensity in the environment will also affect the photodegradation process of antibiotics.The research progress on the photodeg-radation kinetics,influencing factors,and degradation mechanisms of antibiotics is discussed to provide a scientific basis for the ecological risk assessment of antibiotics and the formulation of environmental quality benchmarks.
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