Related Experiment Video
Updated: Aug 14, 2026

A Dual-Functional Electroactive Filter Towards Simultaneously Sb(III) Oxidation and Sequestration
Published on: December 5, 2019
Efficiency and Mechanism of Sulfamethoxazole Removal via Peroxymonosulfate Activation by Using Base Etched
Chen Tian1,2, Yuchen Zhang3, Chu Dai4
1Yangtze River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Wuhan 430223, China.
Abstract:
Developing efficient and eco-friendly catalysts for peroxymonosulfate (PMS) activation to degrade persistent antibiotics in water remains a major challenge. Herein, acid-base etched montmorillonite is employed to activate PMS for sulfamethoxazole (SMX) degradation under neutral to weakly alkaline conditions. Compared with pristine montmorillonite and acid-etched montmorillonite (A-Mon), base-etched montmorillonite (B-Mon) achieves the highest removal efficiency, eliminating 92% of SMX within 120 min. The degradation rate constant of the B-Mon/PMS system is 0.19 min-1, which is 2.7 times that of the pristine montmorillonite/PMS system. Reactive species analysis reveals that the B-Mon/PMS system increases the singlet oxygen (1O2) concentration by 10.3-fold compared to PMS alone. Electron spin resonance (ESR), temperature-programmed desorption (TPD), and quenching experiments demonstrate that medium-weak Lewis basic sites on the B-Mon surface play a pivotal role in PMS activation and SMX degradation. Moreover, these medium-weak Lewis basic sites facilitate 1O2 generation via the self-decomposition mechanism of PMS. Stability tests confirm that B-Mon exhibits excellent cycling stability and anti-interference capability. This work provides a deeper mechanistic insight into the development of environmentally friendly aluminum-based catalysts for practical remediation of complex water.
Related Concept Videos
Electrophilic Aromatic Substitution: Sulfonation of Benzene
Radical Oxidation of Allylic and Benzylic Alcohols
Microbial Bioremediation of Uranium
Drug Metabolism: Phase II Reactions
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
Phase II Reactions: Sulfation and Conjugation with α-Amino Acids
