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Study on the Degradation of Lignin Model Compound Using a Dual Reaction Active Center Catalytic System
Received:May 24, 2024  
DOI：10.11980/j.issn.0254-508X.2024.09.019
Key Words:lignin model compound  persulfate  bimetallic composite catalyst  activated carbon  degradation
Author NameAffiliationPostcode
LIU Wenting China Tobacco Hubei Industry Co.， Ltd.， Wuhan， Hubei Province， 430040 430040
JIA Weiping China Tobacco Hubei Industry Co.， Ltd.， Wuhan， Hubei Province， 430040 430040
LI Chenqiao China Tobacco Hubei Industry Co.， Ltd.， Wuhan， Hubei Province， 430040 430040
SUN Peng Wuhan Hongjinlong Printing Co.， Ltd.， Wuhan， Hubei Province， 430100 430100
LU Jincheng Hubei Key Lab of Green Light Industrial Materials， Hubei University of Technology， Wuhan， Hubei Province， 430068 430068
WANG Peng* Hubei Key Lab of Green Light Industrial Materials， Hubei University of Technology， Wuhan， Hubei Province， 430068 430068
AN Junjian Hubei Key Lab of Green Light Industrial Materials， Hubei University of Technology， Wuhan， Hubei Province， 430068 430068
XIE Yimin Hubei Key Lab of Green Light Industrial Materials， Hubei University of Technology， Wuhan， Hubei Province， 430068 430068
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Abstract:A copper-iron bimetallic composite catalyst supported on activated carbon was prepared by using copper nitrate and iron nitrate as raw materials， which was utilized to activate persulfate to degrade lignin model compound （ferulic acid）. The optimum reactim conditions and effects of catalyst preparation conditions and reaction conditions on the catalytic activation efficiency of the material were also explored. It was found that 90% of ferulic acid could be degraded under the optimum condition （AC content was 6%， sodium persulfate concentration was 0.05 mol/L， dosage of catalyst was 0.03 g/L with molar ratio of Cu2+ to Fe3+ of 2∶1， pH value was 7）. Through the analysis of degradation intermediates， it was found that ferulic acid molecules could be degraded into carboxylic acids with small molecule weight through a series of oxidation reactions. Characterization by electron paramagnetic resonance technology indicated that the main reactive species in the catalytic system were sulfate radicals and hydroxyl radicals. The catalyst possessed good stability and recyclability.
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