Recent Development in Sludge Biochar-Based Catalysts for Advanced Oxidation Processes of Wastewater

Sewage sludge as waste of the wastewater treatment process contains toxic substances, and its conversion into sludge biochar-based catalysts is a promising strategy that merges the merits of waste reutilization and environmental cleanup. This study aims to systematically recapitulate the published a...

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Bibliographic Details
Published in:Catalysts 2021-11, Vol.11 (11), p.1275
Main Authors: Chen, Xingxing, Fu, Liya, Yu, Yin, Wu, Changyong, Li, Min, Jin, Xiaoguang, Yang, Jin, Wang, Panxin, Chen, Ying
Format: Article
Language:English
Subjects:
advanced oxidation processes
application
Bisphenol A
Carbon
catalyst
Catalysts
Catalytic oxidation
Chemical reactions
Decontamination
Efficiency
Environmental cleanup
Fourier transforms
Functional groups
Iron
Metals
Oxidation
Pollutants
Process parameters
Scientific imaging
Sewage sludge
Sludge
Synergistic effect
Wastewater treatment
Water treatment
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Summary:Sewage sludge as waste of the wastewater treatment process contains toxic substances, and its conversion into sludge biochar-based catalysts is a promising strategy that merges the merits of waste reutilization and environmental cleanup. This study aims to systematically recapitulate the published articles on the development of sludge biochar-based catalysts in different advanced oxidation processes of wastewater, including sulfate-based system, Fenton-like systems, photocatalysis, and ozonation systems. Due to abundant functional groups, metal phases and unique structures, sludge biochar-based catalysts exhibit excellent catalytic behavior for decontamination in advanced oxidation systems. In particular, the combination of sludge and pollutant dopants manifests a synergistic effect. The catalytic mechanisms of as-prepared catalysts in these systems are also investigated. Furthermore, initial solution pH, catalyst dosage, reaction temperature, and coexisting anions have a vital role in advanced oxidation processes, and these parameters are systematically summarized. In summary, this study could provide relatively comprehensive and up-to-date messages for the application of sludge biochar-based catalysts in the advanced oxidation processes of wastewater treatment.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal11111275