催化作用
共沉淀
尖晶石
流出物
污染物
氧化物
化学
废水
降级(电信)
化学工程
羟基自由基
光催化
水处理
污水处理
环境化学
水污染物
无机化学
环境科学
材料科学
环境工程
激进的
有机化学
冶金
计算机科学
工程类
电信
作者
Mingjie Huang,Yusheng Li,Chuan-Qi Zhang,Chao Cui,Qingqing Huang,Mengkai Li,Zhimin Qiang,Tao Zhou,Xiaohui Wu,Han‐Qing Yu
标识
DOI:10.1073/pnas.2202682119
摘要
Heterogeneous peroxymonosulfate (PMS)-based advanced oxidation processes (AOPs) have shown a great potential for pollutant degradation, but their feasibility for large-scale water treatment application has not been demonstrated. Herein, we develop a facile coprecipitation method for the scalable production (∼10 kg) of the Cu-Fe-Mn spinel oxide (CuFeMnO). Such a catalyst has rich oxygen vacancies and symmetry-breaking sites, which endorse it with a superior PMS-catalytic capacity. We find that the working reactive species and their contributions are highly dependent on the properties of target organic pollutants. For the organics with electron-donating group (e.g., -OH), high-valent metal species are mainly responsible for the pollutant degradation, whereas for the organics with electron-withdrawing group (e.g., -COOH and -NO2), hydroxyl radical (•OH) as the secondary oxidant also plays an important role. We demonstrate that the CuFeMnO-PMS system is able to achieve efficient and stable removal of the pollutants in the secondary effluent from a municipal wastewater plant at both bench and pilot scales. Moreover, we explore the application prospect of this PMS-based AOP process for large-scale wastewater treatment. This work describes an opportunity to scalably prepare robust spinel oxide catalysts for water purification and is beneficial to the practical applications of the heterogeneous PMS-AOPs.
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