摘要
氧氟沙星大量进入水环境,具有较高的生态风险.探明氧氟沙星在沉积物-水界面上的降解规律有助于对其水环境污染进行控制.本研究探索了从沉积物中提取和测定氧氟沙星的方法,研究了其在沉积物-水界面上的降解动力学过程以及微生物对该过程的影响.研究结果表明利用1:1的乙腈和Mcllvina缓冲溶液(p H=10)可以从沉积物中有效提取氧氟沙星,提取回收率大于90%.降解动力学结果显示:在微生物抑制条件下,氧氟沙星降解微弱;在微生物未抑制条件下氧氟沙星的降解基本符合一级动力学和二级动力学过程,半衰期分别为10.1天和7.2天.研究暗示可以通过工程措施增强水环境中微生物的群落多样性和活性,达到促进水体中氧氟沙星的降解、降低环境风险的目的.
Ofloxacin entering into water environment in large amount causes high ecological risk. Understanding the degradation patterns of this drug is beneficial to control its pollution. This studydevelopeda method of extracting and detecting Ofloxacin from sediment. The degradation kinetics of Ofloxacin at sediment-water interfaces was also studied. The results showed that Ofloxacin can be effectively extracted with acetonitrile -Mcllvina buffer（ pH = 10,1 ： 1 ）. The recovery rate is more than 90%. The study al- so showed that when the microorganisms were inhibited, the degradation of Ofloxacin was weak, while the microorganisms were not inhibited,the degradation of Ofloxacin was in accord with the first-order kinetics as well as the second-order kinetics equation. The half life is 10. 1 and 7.2 days for the two equations, respectively. The studysuggests that engineering measures which can enhance the diversity and activity of microorganisms in water environment would promote the degradation of Ofloxacin in water environment and reduce its ecological risks.
出处
《西南民族大学学报（自然科学版）》
CAS
2016年第4期409-413,共5页
Journal of Southwest Minzu University(Natural Science Edition)
基金
西南民族大学中央高校基本科研业务费专项项目(2016NZYQN17)
四川省大学生创新创业训练计划项目(S2015106560852)
