Facilely tuning the intrinsic catalytic sites of the spinel oxide for peroxymonosulfate activation: From fundamental investigation to pilot-scale demonstration

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Indexed by:Journal paper

First Author:Mingjie Huang, Yu-Sheng Li, Chuan-Qi Zhang, Chao Cui, Qing-Qing Huang, Mengkai Li, Zhimin Qiang, Tao Zhou, Xiaohui Wu, and Han-Qing Yu*

Journal:Proceedings of the National Academy of Sciences of the United States of America

Included Journals:SCI

Place of Publication:美国

Discipline:Engineering

First-Level Discipline:Environmental Science and Engineering

Document Type:J

Volume:119

Issue:30

Page Number:e2202682119

ISSN No.:0027-8424

Key Words:advanced oxidation process, peroxymonosulfate, catalysis, water treatment, large-scale

DOI number:10.1073/pnas.2202682119

Date of Publication:2022-07-18

Impact Factor:12.779

Abstract:Heterogeneous peroxymonosulfate (PMS)–based advanced oxidation processes (AOPs) have shown a great potential for pollutant degradation, but their feasibility for largescale 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 symmetrybreaking 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 PMSbased 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.

Links to published journals:https://www.pnas.org/doi/10.1073/pnas.2202682119