Tuning of Persulfate Activation from a Free Radical to a Nonradical Pathway through the Incorporation of Non-Redox Magnesium Oxide

Nonradical-based advanced oxidation processes for pollutant removal have attracted much attention due to their inherent advantages. Herein we report that magnesium oxides (MgO) in CuOMgO/Fe3O4 not only enhanced the catalytic properties but also switched the free radical peroxymonosulfate (PMS)-activated process into the 1O2 based nonradical process. CuOMgO/Fe3O4 catalyst exhibited consistent performance in a wide pH range from 5.0 to 10.0, and the degradation kinetics were not inhibited by the common free radical scavengers, anions, or natural organic matter. Quantitative structure–activity relationships (QSARs) revealed the relationship between the degradation rate constant of 14 substituted phenols and their…

• NS
  National Science Foundation
• NN
  National Natural Science Foundation of China

  Award: 21671072
• MO
  Ministry of Education of the People's Republic of China

  Award: 2019kfyRCPY058
• MO
  Ministry of Science and Technology of the People's Republic of China

  Award: 2018YFC1802302
• HU
  Huazhong University of Science and Technology
• FR
  Fundamental Research Funds for the Central Universities

  Award: 2019kfyRCPY058