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Advances in preparation,application in contaminant removal,and environmental risks of Biochar-based catalysts:a review

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biochar 2022年第1期4卷 327-357页

作者： Bowen Yang Jiawei Dai Yuan Zhao Jingwei Wu Caiya Ji Yuhu Zhang College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China School of Environmental and Safety Engineering Changzhou UniversityChangzhou 213164China

As a carbon-rich material produced by pyrolysis of biomass,biochar features low cost,large specific surface area,and widely available feedstocks based on the functional diversity and environmental-friendly properties,it has received increasing attention in the fields of pollutant removal due to three win-win effects of water remediation,carbon sequestration and reutilization of wastes.To design excellent Biochar-based catalysts for environmental applications,one must understand recent advances in the catalysts for contaminant removal.This review focuses on the current application of Biochar-based catalysts in redox systems,Fenton-like systems,sonocatalytic systems and photocatalytic systems.Besides in-depth discussion in effects of preparation conditions on physicochemical characteristics of biochars,the review supplements new preparation technologies of biochar and Biochar-based catalysts.Most importantly,the advantages/shortcomings,catalysis mechanisms,as well as the pollutant removal ability of different types of Biochar-based catalysts are discussed.The environmental risks of the catalyst applications are also elaborated on.Future research on biochar-based catalyst production and its environmental applications is discussed.The review provides a good overview of the current advances of Biochar-based catalysts in pollutant control and the future research directions.

关键词： Biochar-based catalysts Sonocatalysts Fenton-like catalysts Photocatalysts Pollutant removal Environmental risks

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