摘要
      抗生素污染水的处理仍然是一个全球性的环境挑战。在本研究中，发现四环素（TC）通过配体-金属电荷转移机制有效地敏化纯TiO2进行可见光光催化降解。敏化归因于TC-TiO2复合物的形成以及TC的分子轨道和TiO2的导带的重叠。然而，TC的中间降解产物没有使TiO2敏化，这是矿化率低的原因。然而，我们的结果表明，TC的中间降解产物显著降低了杀菌效果，减少了抗生素抗性基因（ARGs）的诱导。这项研究展示了使用最常见的光催化剂TiO2有效处理含抗生素废水，降低了ARGs传播的风险。
Abstract
Treatment of antibiotics contaminated water remains a global environmental challenge. In this study, tetracycline (TC) was found to effectively sensitize pure TiO2 for visible light photocatalytic degradation via a ligand-to-metal charge transfer mechanism. The sensitization was attributed to the formation of TC-TiO2 complex and the overlap of the molecular orbitals of TC and the conduction band of TiO2. The intermediate degradation products of TC, however, did not sensitize TiO2, which was the reason for the low mineralization rate. Nevertheless, our results showed that the intermediate degradation products of TC had significantly reduced bactericidal effects and less induction of antibiotic-resistance genes (ARGs). This study showcases an effective treatment of antibiotics-containing wastewater using the most common photocatalyst TiO2 with reduced risk in the spread of ARGs.

https://www.sciencedirect.com/science/article/abs/pii/S1001841722000833