作　　者： ; ; ; ; (郭学涛）; (舒小华）;

机构地区： 桂林电子科技大学生命与环境科学学院

出　　处： 《农业环境科学学报》 2014年第12期2444-2449,共6页

摘　　要： 自然水体中的泰乐菌素的光降解通常受水溶液性质影响,以紫外灯作为光源,考察了水中泰乐菌素(TYL)的光降解特性及影响因素。结果表明,初始浓度为10 mg·L-1的TYL水溶液的6 h后光降解效率在50%左右。碱性条件有助于TYL的光解,酸性和中性条件下TYL的光解情况相似;溶液的初始浓度、NO-3浓度和腐植酸浓度的增大均可抑制TYL的光解。直接光降解可能是水体中泰乐菌素光降解的主要途径。 Photolysis can influence the behaviors of tylosin(TYL), a common veterinary macrolide antibiotic, in the environment. It is also one of the most important ways to remove TYL from the environment. However, TYL photolysis is affected by the properties of aqueous solution. In this paper, a laboratory-scale photochemical reaction device was employed to investigate the photochemical behaviors of TYL in solution under UV light condition. The photochemical degradation of TYL was examined at various initial concentrations of TYL, NO-3and humic acid, and p H values. The results showed that the degradation of TYL within 6 hours was about 50% at the initial TYL concentration of10 mg·L-1. Alkaline condition enhanced TYL photolysis. However, elevated initial TYL, NO-3and humic acid concentrations inhibited TYL photolysis. Nitrate and humic acid might compete light absorption with TYL, thus suppressing TYL photolysis. The present results suggest that direct photolysis might be the major way of TYL degradation in the natural aqueous system.

关 键 词： 抗生素 泰乐菌素 光降解 腐植酸

领　　域： [环境科学与工程]