Electrochemical degradation of the antibiotic ceftazidime by La doped modified PbO2 electrode: Catalytic conditions and degradation pathway

IF 4.5 3区化学 Q1 Chemical Engineering

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 DOI:10.1016/j.jelechem.2023.117620

Ziming Chen , Yafei Du , Guangming Yang , Jian Wang , Yulong Ma , Yonggang Sun , Yongsheng Ren , Xiaoxiao Duan

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Abstract

The use of antibiotics continues to increase, and its unreasonable use and discharge have caused great harm. Electrochemical oxidation is an effective method to solve this problem. In this work, which was prepared by electrodeposition of Ti/PbO₂ and Ti/PbO₂-La electrodes, using the above electrode explores the ceftazidime electrochemical degradation. The results indicated that the electrode doped with La had more active sites and better electrochemical performance. Through 2 h of degradation, the removal rate of ceftazidime attained 96.12 %. Meanwhile, the influence of current density, electrode spacing, electrolyte concentration, and initial concentration of ceftazidime on the degradation efficiency were systematically evaluated. Based on the identification of intermediate products, the degradation pathway was proposed, and ceftazidime was finally degraded to some small molecules. A new method was developed to remove the ceftazidime.

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La掺杂修饰PbO2电极电化学降解抗生素头孢他啶:催化条件和降解途径

抗生素的使用不断增加，其不合理的使用和排放造成了很大的危害。电化学氧化是解决这一问题的有效方法。本文通过电沉积制备Ti/PbO2和Ti/PbO2- la电极，探讨了利用上述电极对头孢他啶的电化学降解。结果表明，掺杂镧的电极具有更多的活性位点和更好的电化学性能。经过2 h的降解，头孢他啶的去除率达到96.12%。同时系统评价了电流密度、电极间距、电解质浓度和头孢他啶初始浓度对降解效率的影响。在中间产物鉴定的基础上，提出了头孢他啶的降解途径，最终将其降解为一些小分子。提出了一种去除头孢他啶的新方法。

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来源期刊

Journal of Electroanalytical Chemistry Chemical Engineering-General Chemical Engineering

CiteScore

7.50

自引率

6.70%

发文量

912

审稿时长

>12 weeks

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.