Journal of Jilin University(Earth Science Edition) ›› 2022, Vol. 52 ›› Issue (6): 2014-2020.doi: 10.13278/j.cnki.jjuese.20210086

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Experimental on Removal of Methylene Blue by Laccase and Biochar Encapsulated Copper Alginate Beads

Piao Yunxian, Liu Zairan, Zhang Yu, Li Kelan   

  1. College of New Energy and Environment，Jilin University/Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Changchun 130021, China
  • Received:2021-03-23 Online:2022-11-26 Published:2022-12-27
  • Supported by:
    the National Natural Science Foundation of China (51809111) 

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Abstract: In order to remove a large amount of methylene blue in water, copper alginate (CA), a good biocompatibility material, was used as the carrier to prepare laccase and biochar encapsulated copper alginate spheres (Lac-BCA) to remove methylene blue. The loading characteristics and stability of the laccase were also investigated. The experimental results showed that the Lac-BCA had a wider operating range of pH (3-7) and temperature (10-80 ℃) compared with the free laccase. The relative activity of Lac-BCA could still be 79.4% when stored at 4 ℃ for 15 d. The Lac-BCA could remove 100.0% methylene blue (15 mg/L) after 8 h, and 93.4% methylene blue could still be removed after five times of reuse. Moreover, due to the addition of highly adsorbent biochar, the removal efficiency of Lac-BCA on pollutants was increased from 46% to 100% compared with CA. 

Key words: biochar；methylene blue, encapsulating, laccase

CLC Number: 

  • X506
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