SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 68 ›› Issue (4): 216-223.DOI: 10.1016/j.cjche.2023.12.015

• • 上一篇    下一篇

Biocatalytic enhancement of laccase immobilized on ZnFe2O4 nanoparticles and its application for degradation of textile dyes

Yuhang Wei1, Qingpeng Zhu1, Weiwei Xie1, Xinyue Wang1, Song Li2, Zhiming Chen1   

  1. 1. School of Chemical and Environmental Engineering, Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application, Anhui Polytechnic University, Wuhu 241000, China;
    2. School of Biology and Food Engineering, Anhui Polytechnic University, Wuhu 241000, China
  • 收稿日期:2023-10-07 修回日期:2023-12-09 出版日期:2024-04-28 发布日期:2024-06-28
  • 通讯作者: Zhiming Chen,E-mail address:zmchen@ahpu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (21471002), Scientific Research Projects of Universities in Anhui Province (2022AH040135), Natural Science Research Project for Anhui Universities (KJ2021A0509) and Anhui Natural Science Foundation (2208085MC83).

Biocatalytic enhancement of laccase immobilized on ZnFe2O4 nanoparticles and its application for degradation of textile dyes

Yuhang Wei1, Qingpeng Zhu1, Weiwei Xie1, Xinyue Wang1, Song Li2, Zhiming Chen1   

  1. 1. School of Chemical and Environmental Engineering, Anhui Laboratory of Functional Coordinated Complexes for Materials Chemistry and Application, Anhui Polytechnic University, Wuhu 241000, China;
    2. School of Biology and Food Engineering, Anhui Polytechnic University, Wuhu 241000, China
  • Received:2023-10-07 Revised:2023-12-09 Online:2024-04-28 Published:2024-06-28
  • Contact: Zhiming Chen,E-mail address:zmchen@ahpu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21471002), Scientific Research Projects of Universities in Anhui Province (2022AH040135), Natural Science Research Project for Anhui Universities (KJ2021A0509) and Anhui Natural Science Foundation (2208085MC83).

摘要: Efficient and convenient treatment of industrial dyeing wastewater is of great significance to guarantee human and animal health. This work presented the enhanced catalytic activity at pH 3.0 of laccase immobilized on amino-functionalized ZnFe2O4 nanoparticles (ZnFe2O4-laccase) and its application for the degradation of textile dyes. Due to the existence of a large number of oxygen vacancies on the surface of the ZnFe2O4 nanoparticles, negative ions accumulated on the magnetic carriers, which resulted in a harsh optimal pH value of the ZnFe2O4-laccase. Laccase activity assays revealed that the ZnFe2O4-laccase possessed superior pH and thermal stabilities, excellent reusability, and noticeable organic solvent tolerance. Meanwhile, the ZnFe2O4 laccase presented efficient and sustainable degradation of high concentrations of textile dyes. The initial decoloration efficiencies of malachite green (MG), brilliant green (BG), azophloxine, crystal violet (CV), reactive blue 19 (RB19), and procion red MX-5B were approximately 99.1%, 95.0%, 93.3%, 87.4%, 86.1%, and 85.3%, respectively. After 10 consecutive reuses, the degradation rates of the textile dyes still maintained about 98.2%, 92.5%, 83.2%, 81.5%, 79.8% and 65.9%, respectively. The excellent dye degradation properties indicate that the ZnFe2O4-laccase has a technical application in high concentrations of dyestuff treatment.

关键词: ZnFe2O4-laccase, Catalytic activity, Stability and reusability, Degradation of textile dye

Abstract: Efficient and convenient treatment of industrial dyeing wastewater is of great significance to guarantee human and animal health. This work presented the enhanced catalytic activity at pH 3.0 of laccase immobilized on amino-functionalized ZnFe2O4 nanoparticles (ZnFe2O4-laccase) and its application for the degradation of textile dyes. Due to the existence of a large number of oxygen vacancies on the surface of the ZnFe2O4 nanoparticles, negative ions accumulated on the magnetic carriers, which resulted in a harsh optimal pH value of the ZnFe2O4-laccase. Laccase activity assays revealed that the ZnFe2O4-laccase possessed superior pH and thermal stabilities, excellent reusability, and noticeable organic solvent tolerance. Meanwhile, the ZnFe2O4 laccase presented efficient and sustainable degradation of high concentrations of textile dyes. The initial decoloration efficiencies of malachite green (MG), brilliant green (BG), azophloxine, crystal violet (CV), reactive blue 19 (RB19), and procion red MX-5B were approximately 99.1%, 95.0%, 93.3%, 87.4%, 86.1%, and 85.3%, respectively. After 10 consecutive reuses, the degradation rates of the textile dyes still maintained about 98.2%, 92.5%, 83.2%, 81.5%, 79.8% and 65.9%, respectively. The excellent dye degradation properties indicate that the ZnFe2O4-laccase has a technical application in high concentrations of dyestuff treatment.

Key words: ZnFe2O4-laccase, Catalytic activity, Stability and reusability, Degradation of textile dye