Abstract Tylosin (TYL), as a difficult degradable antibiotic, has a high risk in inducing drug-resistant bacteria. Photocatalysis technology is identified as an effective method to removal TYL from water. Here, the Sm-doped g-C3N4 (SCN) was synthesized to serve as a novel photocatalyst for degradation of TYL. The characterization results showed that the SCN was embedded with unique mesoporous structure and excellent capacity of charge transportation. In addition, the tests of leaching toxicity, carried out with seed germination and E. coli, demonstrated that the SCN-x were safe in water treatment process. The Sm doping greatly enhanced the photocatalytic performance of g-C3N4 for degradation of TYL and Rhodamine B. It could realize a 3.55 (2.01) times higher than that of CN when the Sm doping amount was 0.025%. The environmental conditions on photocatalytic performance of SCN were systematically investigated, including initial pH, concentration of TYL solution, aeration rate and anion species. All experimental results indicated that the SCN-x catalyst might act as a promising candidate catalyst in photocatalyzation of antibiotic.

中文翻译：

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Sm掺杂介孔g-C3N4高效催化剂降解泰乐菌素：影响因素及毒性评价

摘要 泰乐菌素（TYL）作为一种难降解的抗生素，在诱导耐药菌方面具有很高的风险。光催化技术被确定为从水中去除TYL的有效方法。在这里，合成了 Sm 掺杂的 g-C3N4 (SCN) 作为一种新型光催化剂用于降解 TYL。表征结果表明，SCN嵌入了独特的介孔结构和优异的电荷传输能力。此外，用种子萌发和大肠杆菌进行的浸出毒性测试表明，SCN-x 在水处理过程中是安全的。Sm掺杂大大增强了g-C3N4对TYL和罗丹明B的降解光催化性能。当Sm掺杂量为0.025%时，其光催化性能比CN高3.55（2.01）倍。系统研究了影响SCN光催化性能的环境条件，包括初始pH值、TYL溶液浓度、曝气速率和阴离子种类。所有的实验结果表明，SCN-x 催化剂可能是一种有前景的抗生素光催化候选催化剂。