农业环境科学学报2018，Vol.37Issue(2)：323-331,9.DOI:10.11654/jaes.2017-1098
泰乐菌素的超声波降解效果及机制
The efficiency and mechanism of ultrasonic tylosin degradation
摘要
Abstract
In order to study the effect of ultrasonic waves on the removal of macrolide antibiotics from a water body,the influences of the ini-tial concentration,pH value of the solution,ultrasonic power,and ultrasonic treatment time on ultrasonic degradation were investigated using the common veterinary antibiotic,tylosin(TYL).Moreover,combining H2O2or montmorillonite with ultrasonic treatment was carried out in order to investigate the combined function of TYL degradation.On this basis,an ultrasonic degradation mechanism of TYL was also proposed in this paper.The results showed that ultrasonic treatment could degrade TYL effectively.The TYL degradation rate was 72% with an initial concentration of 10 mg·L-1TYL,pH of 11,ultrasonic power of 280 W,and ultrasonic treatment time of 90 min.The ultrasonic degradation of TYL was noticeably inhibited by the addition of the free radical scavenger.Moreover,the concentration of free radicals was positively corre-lated with the degradation rate of TYL under experimental conditions.These results indicated that the free radical played an important role in the ultrasonic degradation of TYL,and the oxidation of a hydroxyl radical may be the main mechanism of ultrasonic degradation.A syner-gistic phenomenon for the ultrasonic degradation of TYL was observed after an appropriate amount of H2O2/montmorillonite was added to the solution.The degradation efficiency of TYL was enhanced under both conditions.The ultrasonic degradation rate of TYL reached 80.9% and 93.9% when H2O2or montmorillonite were combined with ultrasonic treatment, respectively. Direct oxidation and promotion of·OH oc-curred in the process of combining H2O2with ultrasonic treatment.For montmorillonite,the synergism mechanism might be due to the effect on·OH concentration by adsorption characteristics and Fe2O3in montmorillonite.The synergy of combined ultrasound degradation for an-tibiotics cannot be attributed solely to the oxidation of hydroxyl radicals, and it is closely related to the characteristics of any added sub-stances.The results indicated that macrolide antibiotics could be removed efficiently by an appropriate ultrasound method.The application of ultrasound in the treatment of antibiotics wastewater should be considered.关键词
抗生素/泰乐菌素/超声降解/高级氧化/矿物Key words
antibiotic/tylosin(TYL)/ultrasonic degradation/advanced oxidation/mineral分类
资源环境引用本文复制引用
舒小华,张倩,杨琛,许子夫,韦惠华,梁英,莫德清..泰乐菌素的超声波降解效果及机制[J].农业环境科学学报,2018,37(2):323-331,9.基金项目
国家自然科学基金青年科学基金项目(41501342) （41501342）
广西自然科学基金项目(2016GXNSFBA380116)The Young Scientists Fund of the National Natural Science Foundation of China(41501342) （2016GXNSFBA380116）
The Natural Science Foundation of Guangxi Province,China(2016GXNSFBA380116) （2016GXNSFBA380116）
