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

Title
Application of biochar in advanced oxidation processes: supportive, adsorptive, and catalytic role
Authors
김상훈FaheemJiangkun DuMuhammad Azher HassanSana IrshadJianguo Bao
Issue Date
2020-10
Publisher
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Citation
VOL 27, NO 30-37312
Abstract
The advanced oxidation processes (AOPs), especially sulphate radical (SO4radical dot-) 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 radical dotOH, SO4radical dot-, 1O2, and O2radical dot- 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.
URI
http://pubs.kist.re.kr/handle/201004/72904
ISSN
0944-1344
Appears in Collections:
KIST Publication > ETC
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