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Study on Mn-Cu Composite Catalyzed Persulfate for Degradation of Lignin-like Pollutants
Received:July 08, 2024  
DOI：10.11980/j.issn.0254-508X.2025.01.019
Key Words:persulfate  Mn-Cu bimetallic composite catalyst  lignin  papermaking wastewater  degradation
Fund Project:国家自然科学基金（32071722）。
Author NameAffiliationPostcode
AN Junjian* Hubei Key Lab of Green Light Industrial Materials, Hubei University of Technology, Wuhan, Hubei Province, 430068 430068
LU Jincheng Hubei Key Lab of Green Light Industrial Materials, Hubei University of Technology, Wuhan, Hubei Province, 430068 430068
WANG Shanshan 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
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Abstract:MnO2-Cu（mIM）2 bimetallic composite catalyst was prepared by co-precipitation method using manganese dioxide， copper nitrate， and dimethylimidazole as raw materials. The catalyst was used to activate persulfate and degrade vanillic acid as a lignin model. The single factor method and response surface methodology were used to study the influence of the preparation conditions of catalysts and reaction conditions on the catalytic activation efficiency of catalyst， further explored the catalytic mechanism of catalysts. The results showed that 94.23% of vanilla could be degraded at the optimum conditions （catalyst dosage of 0.387 g/L， initial concentration of oxidant of 1.3 mmol/L， pH value of 6.1）. It was indicated that the pollutants in papermaking wastewater could be effectively catalytic activated degraded with the result of three position fluorescence detection. Characterization by electron paramagnetic resonance indicated that the main reactive species in the degradation system were 1O2， ·OH， and SO4-·， with non-free radical 1O2 playing a major role.
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