期刊
CATALYSTS
卷 11, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/catal11111275
关键词
sludge; catalyst; wastewater treatment; advanced oxidation processes; application
资金
- basic research fund of the central public-interest scientific institution [2020YSKY-005]
- China special S&T project on treatment and control of water pollution [2017ZX07402002]
This study systematically reviews the development and application of sludge biochar-based catalysts in various advanced oxidation processes for wastewater treatment. The catalysts demonstrate excellent catalytic behavior due to their abundant functional groups, metal phases, and unique structures, with a synergistic effect when combined with pollutant dopants. Factors such as initial solution pH, catalyst dosage, reaction temperature, and coexisting anions play vital roles in the advanced oxidation processes.
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.
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