Nonradical reaction driven by peroxymonosulfate(PMS)based advanced oxidation pro-cesses has drawn widespread attention in water treatment due to their inherent advantages,but the degradation behavior and mechanism of organic pollutants are still unclear.In this study,the performance,intermediates,mechanism and toxicity of tetracycline(TC)degra-dation were thoroughly examined in the constructed magnetic nitrogen-doped porous car-bon/peroxymonosulfate(Co-N/C-PMS)system.The results showed that 85.4％of TC could be removed within 15 min when Co-N/C and PMS was simultaneously added and the degra-dation rate was enhanced by 3.4 and 14.7 folds compared with Co-N/C or PMS alone,re-spectively.Moreover,the performance of Co-N/C was superior to that of most previously reported catalysts.Many lines of evidence indicated that Co-N/C-PMS system was a singlet oxygen-dominated nonradical reaction,which was less interfered by pH and water compo-nents,and displayed high adaptability to actual water bodies.Subsequently,the degrada-tion process was elaborated on the basis of three-dimensional excitation-emission matrix spectra and liquid chromatography-mass spectrometry.At last,the toxicity of treated TC was greatly reduced by using microalgae Coelastrella sp.as ecological indicator.This study provides a promising approach based on singlet oxygen-dominated nonradical reaction for eliminating TC in water treatment.

Shaohua Wu;Chunping Yang;Yan Lin;Jay J.Cheng

Guangdong Provincial Key Laboratory of Petrochemcial Pollution Processes and Control,School of Environmental Science and Engineering,Guangdong University of Petrochemical Technology,Maoming,Guangdong 525000,China;College of Environmental Science and Engineering,Hunan University and Key Laboratory of Environmental Biology and Pollution Control(Hunan University),Ministry of Education,Changsha,Hunan 410082,China;Maoming Engineering Research Center for Organic Pollution Control,Academy of Environmental and Resource Sciences,Guangdong University of Petrochemical Technology,Maoming,Guangdong 525000,China;Hunan Provincial Environmental Protection Engineering Center for Organic Pollution Control of Urban Water and Wastewater,Changsha,Hunan 410001,China;Department of Biological and Agricultural Engineering,North Carolina State University,Raleigh,NC 27695,USA

环境科学学报（英文版）

[1]Shaohua Wu;Chunping Yang;Yan Lin;Jay J.Cheng-.Efficient degradation of tetracycline by singlet oxygen-dominated peroxymonosulfate activation with magnetic nitrogen-doped porous carbon)[J].环境科学学报（英文版）,2022(05):330-340

Nonradical,nonradical,Coelastrella

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