Enhancing laccase stability and activity for dyes decolorization using ZIF-8@MWCNT nanocomposite

doi:10.1016/j.cjche.2021.05.044

Chinese Journal of Chemical Engineering ›› 2022, Vol. 48 ›› Issue (8): 66-75.DOI: 10.1016/j.cjche.2021.05.044

Enhancing laccase stability and activity for dyes decolorization using ZIF-8@MWCNT nanocomposite

Pascal Habimana¹, Yanjun Jiang¹, Jing Gao¹, Jean Bernard Ndayambaje², Osama M. Darwesh³, Jean Pierre Mwizerwa⁴, Xiaobing Zheng¹, Li Ma¹

1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
2. University of Rwanda, College of Science and Technology, 3900 Kigali, Rwanda;
3. Department of Agricultural Microbiology, National Research Centre, Cairo 12622, Egypt;
4. College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China

Received:2021-01-06 Revised:2021-04-27 Online:2022-09-30 Published:2022-08-28
Contact: Xiaobing Zheng,E-mail:zhengxiaobing@hebut.edu.cn;Li Ma,E-mail:mali0502@hebut.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (Nos.21576068, 21276060, 21276062, and 21306039), the Natural Science Foundation of Tianjin City (16JCY-BJC19800), the Natural Science Foundation of Hebei Province (B2015202082, B2016202027, and B2020202036), the Science and Technology Program Project of Tianjin?(20YDTPJC00260), the Program for Top 100 Innovative Talents in Colleges and Universities of Hebei Province (SLRC2017029) and Hebei High level personnel of support program (A2016002027).

Enhancing laccase stability and activity for dyes decolorization using ZIF-8@MWCNT nanocomposite

Pascal Habimana¹, Yanjun Jiang¹, Jing Gao¹, Jean Bernard Ndayambaje², Osama M. Darwesh³, Jean Pierre Mwizerwa⁴, Xiaobing Zheng¹, Li Ma¹

1. School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China;
2. University of Rwanda, College of Science and Technology, 3900 Kigali, Rwanda;
3. Department of Agricultural Microbiology, National Research Centre, Cairo 12622, Egypt;
4. College of Mechatronics and Control Engineering, Shenzhen University, Shenzhen 518060, China

通讯作者: Xiaobing Zheng,E-mail:zhengxiaobing@hebut.edu.cn;Li Ma,E-mail:mali0502@hebut.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (Nos.21576068, 21276060, 21276062, and 21306039), the Natural Science Foundation of Tianjin City (16JCY-BJC19800), the Natural Science Foundation of Hebei Province (B2015202082, B2016202027, and B2020202036), the Science and Technology Program Project of Tianjin?(20YDTPJC00260), the Program for Top 100 Innovative Talents in Colleges and Universities of Hebei Province (SLRC2017029) and Hebei High level personnel of support program (A2016002027).

Abstract

Abstract: The continuous use of chemical dyes in various industries, and their discharge into industrial effluents, results in severe problems to human life and water pollution. Laccases have the ability to decolorize dyes and toxic chemicals in industrial effluents as green biocatalysts. Their possible industrial applications have been limited by poor reusability, low stability, and loss of free laccase action. In this research, laccase was immobilized on zeolitic imidazolate framework coated multi-walled carbon nanotubes (Laccase@ZIF-8@MWCNTs) via metal affinity adsorption to develop an easy separable and stable enzyme. The optimum reaction conditions for immobilized laccase are at a pH of 3.0 and a temperature of 60?℃. The immobilized laccase was enhanced in storage and thermal stability. The results indicated that Laccase@ZIF-8@MWCNTs still maintained 68% of its original activity after 10 times of repeated use. Most importantly, the biocatalytic system was applied for decolorization of different dyes (20?mg·L^?1) without a mediator, and up to 97.4% for Eriochrome black T and 95.6% Acid red 88 was achieved in 25 min. Biocatalysts with these properties may be used in a variety of environmental and industrial applications.

Key words: Metal-organic framework, Zeolitic imidazolate framework, Reusability and stability, Immobilized laccase, Dye decolorization

摘要： The continuous use of chemical dyes in various industries, and their discharge into industrial effluents, results in severe problems to human life and water pollution. Laccases have the ability to decolorize dyes and toxic chemicals in industrial effluents as green biocatalysts. Their possible industrial applications have been limited by poor reusability, low stability, and loss of free laccase action. In this research, laccase was immobilized on zeolitic imidazolate framework coated multi-walled carbon nanotubes (Laccase@ZIF-8@MWCNTs) via metal affinity adsorption to develop an easy separable and stable enzyme. The optimum reaction conditions for immobilized laccase are at a pH of 3.0 and a temperature of 60?℃. The immobilized laccase was enhanced in storage and thermal stability. The results indicated that Laccase@ZIF-8@MWCNTs still maintained 68% of its original activity after 10 times of repeated use. Most importantly, the biocatalytic system was applied for decolorization of different dyes (20?mg·L^?1) without a mediator, and up to 97.4% for Eriochrome black T and 95.6% Acid red 88 was achieved in 25 min. Biocatalysts with these properties may be used in a variety of environmental and industrial applications.

关键词: Metal-organic framework, Zeolitic imidazolate framework, Reusability and stability, Immobilized laccase, Dye decolorization

Pascal Habimana, Yanjun Jiang, Jing Gao, Jean Bernard Ndayambaje, Osama M. Darwesh, Jean Pierre Mwizerwa, Xiaobing Zheng, Li Ma. Enhancing laccase stability and activity for dyes decolorization using ZIF-8@MWCNT nanocomposite[J]. Chinese Journal of Chemical Engineering, 2022, 48(8): 66-75.

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Enhancing laccase stability and activity for dyes decolorization using ZIF-8@MWCNT nanocomposite

Enhancing laccase stability and activity for dyes decolorization using ZIF-8@MWCNT nanocomposite

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