Multi-chamber membrane capacitive deionization coupled with peroxymonosulfate to achieve simultaneous removal of tetracycline and peroxymonosulfate reaction byproducts

• Published in: Journal of hazardous materials Vol. 476; p. 135036
• Main Authors: Yu, Minghao, Yang, Chenxu, Chen, Meng, Li, Yunke, Kang, Kexin, Wang, Cheng, Niu, Jianrui, Mu, Situ, Zhang, Jing, Liu, Chun, Ma, Junjun
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 05-09-2024
• Subjects: Anti-Bacterial Agents - chemistry; Byproduct ions; Membranes, Artificial; Multi-chamber membrane capacitive deionization; Oxidation-Reduction; Oxidative degradation; Peroxides - chemistry; Peroxymonosulfate; Reactive Oxygen Species - chemistry; Tetracycline; Tetracycline - chemistry; Water Pollutants, Chemical - chemistry; Water Purification - methods; Multi-chamber membrane capacitive deionization; Peroxymonosulfate; Byproduct ions; Oxidative degradation; Tetracycline
• ISSN: 0304-3894; 1873-3336; 1873-3336
• DOI: 10.1016/j.jhazmat.2024.135036

Advanced oxidation technologies based on peroxymonosulfate (PMS) have been extensively applied for the degradation of antibiotics. However, the degradation process inevitably introduces SO42- and other sulfur-containing anions, these pollutants pose a huge threat to the water and soil environment. Addressing these concerns, this study introduced PMS oxidation into a multi-chamber membrane capacitive deionization (MC-MCDI) device to achieve simultaneous tetracycline (TC) degradation and removal of PMS reaction byproduct ions. The experimental results demonstrated that when the TC solution (40 mg L−1) was pre-adsorbed for 10 min, the voltage was 1.2 V and the concentration of PMS solution added was 4 mg mL−1, the removal efficiency of TC and ion can reach 77.4 % and 46.5 % respectively. Furthermore, the activation process of PMS in MC-MCDI/PMS system and the reactive oxygen (ROS) that mainly produce degradation were deeply investigated. Finally, liquid chromatography-mass spectrometry (LC-MS) was employed to identify intermediates of TC degradation, propose potential degradation pathways, and analyze the toxicities of the intermediates. In addition, in five cycles, the MC-MCDI/PMS system demonstrated excellent stability. This study provides an effective strategy for treating TC wastewater and a novel approach for simultaneous TC degradation and desalination.
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•Effect of PMS activation residual ions on environment was concerned.•MC-MCDI coupling with PMS system was proposed innovatively.•TC and PMS activation residual ions can be removed simultaneously.•The operation mechanism of MC-MCDI/PMS system was analyzed detailly.