Citation: Runsheng Xu, Haotian Wu, Daoyuan Zu, Kui Yang, Xiangtong Kong, Jinxing Ma. Porous cathode enables continuous flow anodic oxidation for water purification: Performance and mechanisms[J]. Chinese Chemical Letters, ;2025, 36(8): 110517. doi: 10.1016/j.cclet.2024.110517 shu

Porous cathode enables continuous flow anodic oxidation for water purification: Performance and mechanisms

Runsheng Xu ^a ,
Haotian Wu ^a ,
Daoyuan Zu ^{a, *,} ,
Kui Yang ^{a, b} ,
Xiangtong Kong ^c ,
Jinxing Ma ^{a, *,}

a.
Guangdong Basic Research Center of Excellence for Ecological Security and Green Development, Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou 510006, China
b.
Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai 519087, China
c.
Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia

zudaoyuan@126.com

jinxing.ma@gdut.edu.cn

Received Date: 1 May 2024
Revised Date: 20 August 2024
Accepted Date: 29 September 2024
Available Online: 30 September 2024

Figures(5)

Flow anodic oxidation system has demonstrated to be a promising and environmental benign water treatment technology because of its advantages of high contaminant removal efficiency and low energy consumption. However, traditional setup needs an external unit for flow anode material separation and recovery, which inevitably increases the capital cost and hinders its continuous operation. Herein, a specific porous cathode is introduced to achieve continuous water purification with high contaminant removal in a flow anodic oxidation system. The effluent concentration of carbamazepine (CBZ), a common and model contaminant widely detected in natural water environment, was reduced by 99%. The linear sweep voltammetry (LSV) and quenching tests demonstrated that HO^• was the dominant reactive species. While the removal of contaminants was inhibited in practical surface water, largely related to the quenching by dissolved organic matter and bicarbonate, the flow anodic oxidation process was competent in alleviating the ecotoxicity following oxidation. Our study constructs a modular device for cost-effective continuous water purification and provides insight into the mechanisms of flow andic oxidation.
- Water purification,
- Flow anodic oxidation,
- Porous cathode,
- Magnéli phase titanium suboxide,
- Carbamazepine
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