水环境中抗生素的光降解研究进展
Research progress on photodegradation of antibiotics in aqueous solution
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摘要: 抗生素的大量使用已经成为了全球环境问题.由于其在环境水体中难以被微生物降解,且能导致细菌抗药性越来越受到关注.光降解是污染物在水环境中非常重要的非生物降解途径.本文介绍了水环境中抗生素的直接、间接和自敏化光降解动力学,着重阐述了抗生素的光降解过程的影响因素、降解产物和可能降解途径等最新研究成果,指出抗生素光降解产物的分离提取与结构鉴定,以及预测抗生素降解过程的动力学模型构建将成为今后主要的研究方向和趋势.Abstract: The extensive use of antibiotics has been a worldwide environmental issue. A growing concern was paid to antibiotics due to their non-biodegradation and potential to induce bacterial resistance. Photodegradation is one of the important abiotic degradation pathways of contaminants in water. This paper summarized the latest information available in the literature on photochemical behavior of antibiotics. The photodegradation kinetics, including direct, indirect and self sensitization were introduced. Various influence factors,such as light intensity, pH, aqueous dissolved matter (DOM) and different nitrogen forms on the photodegradation kinetics of antibiotics were highlighted, and the photodegradation pathways and mechanisms were also discussed for some selected antibiotics. It was suggested that the separation of photodegradation products, structure identification and model development for predicting photodegradation kinetics process need to be further pursued in future research.
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Key words:
- antibiotics /
- photodegradation /
- influence factors /
- photolysis pathways
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