介孔材料
氧化还原
激进的
浸出(土壤学)
羟基自由基
矿化(土壤科学)
化学
降级(电信)
光化学
硫酸盐
无机化学
化学工程
催化作用
氮气
计算机科学
有机化学
电信
工程类
土壤科学
土壤水分
环境科学
作者
Anqi Wang,Chao Zuo,Zhikeng Zheng,Hong Xu,Hui Wang,Ho-Min Kang,Kai Yan
标识
DOI:10.1016/j.cej.2019.122340
摘要
Sulfate radical-based advanced oxidation processes (SR-AOPs) are promising alternatives to conventional hydroxyl radical-AOPs for recalcitrant contaminants elimination in water treatment. Herein, the efficient and fast degradation of antibiotic levofloxacin (LEV) using mesoporous [email protected]x microspheres was successfully achieved with peroxymonosulfate (PMS) as an oxidant under simulated sunlight irradiation. Remarkably, [email protected]x catalyst achieves 98.1% degradation and 81.4% mineralization of LEV after being irradiated for 30 min, and SO4−, OH, O2− and 1O2 species play the imperative role in the SR-photo-Fenton-like oxidation process. Through the reaction intermediates identification, the LEV degradation pathways are speculated. The deterioration of performance is inconspicuous in the cyclic runs with negligible Mn-ions leaching. The excellent catalytic activity and stability of the H2-reduced [email protected]x microsphere are ascribed to the mesoporous structure, multivalence and oxygen vacancies, resulting in the large specific area, strong UV–vis response, effective charge separation coupling with desirable self-redox properties of Mn-ions on the catalyst surface. This study offers a useful guideline to efficiently degrade recalcitrant contaminants for water treatment.
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