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Tackling Challenges of Long-Term Electrode Stability in Electrochemical Treatment of 1,4-Dioxane in Groundwater
- Title
- Tackling Challenges of Long-Term Electrode Stability in Electrochemical Treatment of 1,4-Dioxane in Groundwater
- Authors
- Chen, Wensi; Rigby, Kali; Lim, Hyun Jeong; Kim, David J.; Kim, Jae-Hong
- Ewha Authors
- 임현정
- SCOPUS Author ID
- 임현정
![scopus](/images/layout/icon2.png)
- Issue Date
- 2024
- Journal Title
- ENVIRONMENTAL SCIENCE & TECHNOLOGY
- ISSN
- 0013-936X
1520-5851
- Citation
- ENVIRONMENTAL SCIENCE & TECHNOLOGY vol. 58, no. 30, pp. 13552 - 13561
- Keywords
- electrochemical; advanced oxidation; 1,4-dioxane; pulse; titanium suboxide
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; SCOPUS
![WOS](/images/layout/wos.gif)
- Document Type
- Article
- Abstract
- Electrochemical advanced oxidation is an appealing point-of-use groundwater treatment option for removing pollutants such as 1,4-dioxane, which is difficult to remove by using conventional separation-based techniques. This study addresses a critical challenge in employing electrochemical cells in practical groundwater treatment & horbar;electrode stability over long-term operation. This study aims to simulate realistic environmental scenarios by significantly extending the experimental time scale, testing a flow-through cell in addition to a batch reactor, and employing an electrolyte with a conductivity equivalent to that of groundwater. We first constructed a robust titanium suboxide nanotube mesh electrode that is utilized as both anode and cathode. We then implemented a pulsed electrolysis strategy in which reactive oxygen species are generated during the anodic cycle, and the electrode is regenerated during the cathodic cycle. Under optimized conditions, single-pass treatment through the cell (effective area: 2 cm(2)) achieved a remarkable 65-70% removal efficiency for 1,4-dioxane in the synthetic groundwater for over 100 h continuous operation at a low current density of 5 mA cm(-2) and a water flux of 6 L m(-2) h(-1). The electrochemical cell and pulse treatment scheme developed in this study presents a critical advancement toward practical groundwater treatment technology.
- DOI
- 10.1021/acs.est.4c03189
- Appears in Collections:
- 공과대학 > 환경공학과 > Journal papers
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