研究报告

  • 李晓良,路思佳,郑兴,杨鹤云.活性碳纤维修饰PbO2电极的制备及其对阿莫西林的降解解毒研究[J].环境科学学报,2021,41(10):3985-3992

  • 活性碳纤维修饰PbO2电极的制备及其对阿莫西林的降解解毒研究
  • Fabrication of PbO2 electrode modified by activated carbon fiber and its degradation and detoxification of amoxicillin
  • 基金项目:陕西省教育厅重点实验室科研计划项目(No.19JS049);中国博士后科学基金资助项目(No.2020M683688XB)
  • 作者
  • 单位
  • 李晓良
  • 西安理工大学, 西北旱区生态水利国家重点实验室, 陕西 710048
  • 路思佳
  • 西安理工大学, 西北旱区生态水利国家重点实验室, 陕西 710048
  • 郑兴
  • 西安理工大学, 西北旱区生态水利国家重点实验室, 陕西 710048
  • 杨鹤云
  • 西安理工大学, 西北旱区生态水利国家重点实验室, 陕西 710048
  • 摘要:采用电沉积法将活性碳纤维(ACF)修饰于PbO2阳极表面,通过扫描电镜(SEM)、X射线衍射仪(XRD)、电化学工作站等对其进行表征分析与优选.并以优选电极对典型抗生素阿莫西林(AMX)进行电催化降解,同时探究AMX在电催化过程中的降解效果与毒性演变规律.结果表明,ACF以"镶嵌"的方式被修饰于电极表层,且修饰后的电极析氧过电位、电荷传输速率、产·OH速率、稳定性等均有所提高.电催化降解结果显示,经120 min电催化处理,AMX去除率和矿化率分别达到70.69%、58.61%.基因毒理学测试结果表明,AMX毒性水平随电催化降解时间延长呈逐渐下降趋势,转录效应指数TELItotal数值由最初的1.96降至1.72.同时AMX经电催化处理后氧化应激、膜应激与一般应激表达均由强烈转为温和.
  • Abstract:Activated carbon fiber (ACF) was fabricated on the surface of PbO2 electrode by using electrodeposition method. Characterization and optimization of electrode was performed with scanning electron microscope (SEM), X-ray diffractometer (XRD) and electrochemical workstation. The electrocatalytic degradation of amoxicillin (AMX) was carried out with the optimized electrode, and the degradation of AMX and variation of its toxicity were also investigated. Results show that ACF was present on the surface layer of the electrode in a "filled in" manner, after modification. The performance of selected electrode was improved in terms of oxygen-evolution overpotential, charge transfer rate, ·OH production capacity and stability. AMX degradation results showed that after 120 minutes of electrocatalytic treatment, the removal and mineralization of targeted pollutant reached 70.7% and 58.6%, respectively. Genotoxicological results show that the toxicity of AMX tended to decrease gradually along with increasing electrocatalytic reaction time, indicated by the decrease of transcriptional effect index TELItotal from 1.96 to 1.72. Accordingly, oxidative stress, membrane stress and general stress changed from strong to mild.

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