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Application of biochar in advanced oxidation processes: supportive, adsorptive, and catalytic role.

Authors
  • Faheem,1
  • Du, Jiangkun2
  • Kim, Sang Hoon3
  • Hassan, Muhammad Azher4
  • Irshad, Sana1
  • Bao, Jianguo5
  • 1 School of Environmental Studies, China University of Geosciences, 430074, Wuhan, People's Republic of China. , (China)
  • 2 School of Environmental Studies, China University of Geosciences, 430074, Wuhan, People's Republic of China. [email protected] , (China)
  • 3 Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul, 136-791, Korea. , (North Korea)
  • 4 Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China. , (China)
  • 5 School of Environmental Studies, China University of Geosciences, 430074, Wuhan, People's Republic of China. [email protected] , (China)
Type
Published Article
Journal
Environmental Science and Pollution Research
Publisher
Springer-Verlag
Publication Date
Oct 01, 2020
Volume
27
Issue
30
Pages
37286–37312
Identifiers
DOI: 10.1007/s11356-020-07612-y
PMID: 31933079
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The advanced oxidation processes (AOPs), especially sulphate radical (SO4•-)-based AOPs (SR-AOPs), have been considered more effective, selective, and prominent technologies for the removal of highly toxic emerging contaminants (ECs) due to wide operational pH range and relatively higher oxidation potential (2.5-3.1 V). Recently, biochar (BC)-based composite materials have been introduced in AOPs due to the dual benefits of adsorption and catalytic degradation, but the scientific review of BC-based catalysts for the generation of reactive oxygen species (ROSs) through radical- and non-radical-oriented routes for EC removal was rarely reported. The chemical treatments, such as acid/base treatment, chemical oxidation, surfactant incorporation, and coating and impregnation of minerals, were applied to make BC suitable as supporting materials (SMs) for the loading of Fenton catalysts to boost up peroxymonosulphate/persulphate/H2O2 activation to get ROSs including •OH, SO4•-, 1O2, and O2•- for targeted pollutant degradation. In this review, all the possible merits of BC-based catalysts including supportive, adsorptive, and catalytic role are summarised along with the possible route for the development prospects of BC properties. The limitations of SR-AOPs especially on production of non-desired oxyanions, as well as disinfection intermediates and their potential solutions, have been identified. Lastly, the knowledge gap and future-oriented research needs are highlighted.

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