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Degradation of Norfloxacin in saline water by synergistic effect of anode and cathode in a novel photo-electrochemical system

Yu, Han LU ; Dou, Dexing; Zhang, Xi; Zhang, Linus LU ; Dong, Heng and Yu, Hongbing (2020) In Journal of Cleaner Production 242.
Abstract

The removal and degradation of refractory antibiotics in saline water by electrochemical and photo-electrochemical catalysis has emerged as a worldwide research hotspot. Aiming to improve degradation performance, most of the concerned studies focus on new sophisticated materials and modification methods on the single working electrode (anode or cathode). But the synergistic effects between anode and cathode has rarely been studied, especially in photo-electrochemical system. In this work, these effects were initially developed and investigated in the photo-electrochemical system. In this work, a low-cost double-working electrodes photo-electrochemical system (TSSC-Photo) with Ti/SnO2-Sb anode and carbon black air diffusion... (More)

The removal and degradation of refractory antibiotics in saline water by electrochemical and photo-electrochemical catalysis has emerged as a worldwide research hotspot. Aiming to improve degradation performance, most of the concerned studies focus on new sophisticated materials and modification methods on the single working electrode (anode or cathode). But the synergistic effects between anode and cathode has rarely been studied, especially in photo-electrochemical system. In this work, these effects were initially developed and investigated in the photo-electrochemical system. In this work, a low-cost double-working electrodes photo-electrochemical system (TSSC-Photo) with Ti/SnO2-Sb anode and carbon black air diffusion cathode (TSSC) was constructed for Norfloxacin (NOR) degradation in saline water. The degradation efficiency, vital factors, degradation pathways were investigated. The mathematic modeling was adopted to distinguish the degradation kinetics and degradation contributions ratio from anode and cathode sides of this system. Owing to the synergistic effects of both electrodes, a rapidly complete NOR removal was achieved within 4 min and the highest TOC removal ratio reached 83.9% within 120 min. Free radicals (•Cl, •OH, etc) were considered as dominate oxidants in degradation with no activated chlorine (HClO/ClO) detected from the electrolyte during the photo-electrolysis. The analysis based on the mathematic modeling indicated that anode acted as the only contributor (>97% of overall contribution) during the first 5 min of photo-electrolysis, whereas at the end of 120 min running, 21.4% of the total contribution came from cathode side. The remarkable performance of TSSC-Photo claimed its great capacity for organic matter degradation in saline water especially with Cl.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Carbon air diffusion cathode, Cleaner production, Norfloxacin degradation, Photo-electrochemical, Ti/SnO-Sb anode
in
Journal of Cleaner Production
volume
242
publisher
Elsevier
external identifiers
  • scopus:85072639787
ISSN
0959-6526
DOI
10.1016/j.jclepro.2019.118548
language
English
LU publication?
yes
id
2d29715f-3eb4-4211-aa07-7f30bbe63906
date added to LUP
2019-10-02 12:23:09
date last changed
2019-10-02 12:23:09
@article{2d29715f-3eb4-4211-aa07-7f30bbe63906,
  abstract     = {<p>The removal and degradation of refractory antibiotics in saline water by electrochemical and photo-electrochemical catalysis has emerged as a worldwide research hotspot. Aiming to improve degradation performance, most of the concerned studies focus on new sophisticated materials and modification methods on the single working electrode (anode or cathode). But the synergistic effects between anode and cathode has rarely been studied, especially in photo-electrochemical system. In this work, these effects were initially developed and investigated in the photo-electrochemical system. In this work, a low-cost double-working electrodes photo-electrochemical system (TSSC-Photo) with Ti/SnO<sub>2</sub>-Sb anode and carbon black air diffusion cathode (TSSC) was constructed for Norfloxacin (NOR) degradation in saline water. The degradation efficiency, vital factors, degradation pathways were investigated. The mathematic modeling was adopted to distinguish the degradation kinetics and degradation contributions ratio from anode and cathode sides of this system. Owing to the synergistic effects of both electrodes, a rapidly complete NOR removal was achieved within 4 min and the highest TOC removal ratio reached 83.9% within 120 min. Free radicals (•Cl, •OH, etc) were considered as dominate oxidants in degradation with no activated chlorine (HClO/ClO<sup>−</sup>) detected from the electrolyte during the photo-electrolysis. The analysis based on the mathematic modeling indicated that anode acted as the only contributor (&gt;97% of overall contribution) during the first 5 min of photo-electrolysis, whereas at the end of 120 min running, 21.4% of the total contribution came from cathode side. The remarkable performance of TSSC-Photo claimed its great capacity for organic matter degradation in saline water especially with Cl<sup>−</sup>.</p>},
  articleno    = {118548},
  author       = {Yu, Han and Dou, Dexing and Zhang, Xi and Zhang, Linus and Dong, Heng and Yu, Hongbing},
  issn         = {0959-6526},
  keyword      = {Carbon air diffusion cathode,Cleaner production,Norfloxacin degradation,Photo-electrochemical,Ti/SnO-Sb anode},
  language     = {eng},
  publisher    = {Elsevier},
  series       = {Journal of Cleaner Production},
  title        = {Degradation of Norfloxacin in saline water by synergistic effect of anode and cathode in a novel photo-electrochemical system},
  url          = {http://dx.doi.org/10.1016/j.jclepro.2019.118548},
  volume       = {242},
  year         = {2020},
}