کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6601911 | 1424073 | 2018 | 43 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evolution of the antibacterial activity and oxidation intermediates during the electrochemical degradation of norfloxacin in a flow cell with a PTFE-doped β-PbO2 anode: Critical comparison to a BDD anode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Evolution of the antibacterial activity and oxidation intermediates during the electrochemical degradation of norfloxacin in a flow cell with a PTFE-doped β-PbO2 anode: Critical comparison to a BDD anode Evolution of the antibacterial activity and oxidation intermediates during the electrochemical degradation of norfloxacin in a flow cell with a PTFE-doped β-PbO2 anode: Critical comparison to a BDD anode](/preview/png/6601911.png)
چکیده انگلیسی
The electrochemical degradation of the antibiotic norfloxacin (NOR) was investigated using an electrodeposited polytetrafluoroethylene (PTFE)-doped β-PbO2 anode; its attained performance was compared to that of a boron-doped diamond (BDD) anode to check out a literature claim of superior performance by the former anode. The PTFE content in the electrodeposition bath was optimized to lead to a significantly extended service life of the β-PbO2 anode despite its titanium substrate. The NOR degradation electrolyses (100â¯mgâ¯Lâ1 NOR in 0.1â¯molâ¯Lâ1 Na2SO4) were carried out in a filter-press flow cell (flow rate of 420â¯Lâ¯hâ1) using the following optimized conditions: no pH control, current density of 10 mAâ¯cmâ2, and 40â¯Â°C. The electrooxidation process performance under these conditions was assessed through the evolution of the attained removals of NOR, total organic carbon (TOC), and antibacterial activity against Escherichia coli; the evolution of oxidation intermediates (aromatic compounds and carboxylic acids) was also assessed. In spite of the complete oxidation of NOR, the TOC removal attained with the PTFE-doped β-PbO2 anode was relatively low (70% after 12â¯h, compared to 90% after only 5â¯h for a Si/BDD anode). As a consequence of this inferior performance comparatively to that of a BDD anode, a higher number of aromatic intermediates was detected; these intermediates seemed to still present antibacterial activity against Escherichia coli, which lasted even after all NOR was oxidized, contrary to the case of the electrooxidation with a BDD anode. The performance of the PTFE-doped β-PbO2 anode was not superior to that of a BDD anode, i.e. the doping of the β-PbO2 film with PTFE, making it hydrophobic, does not change the oxidation power of the anode despite increasing its service life.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 284, 10 September 2018, Pages 260-270
Journal: Electrochimica Acta - Volume 284, 10 September 2018, Pages 260-270
نویسندگان
Isaac Sánchez-Montes, José R. Fuzer Neto, Bianca F. Silva, Adilson J. Silva, José M. Aquino, Romeu C. Rocha-Filho,