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Langmuir

Langmuir

IF: 3.7
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Solar Energy-Promoted Bisphenol A Degradation with Immobilized Laccase in an Fe3O4-Embedded Metal–Organic Framework

Published:11 December 2024 DOI: 10.1021/acs.langmuir.4c03349
Zixuan Li, Jiacheng Sun, Qinghong Shi, Xiaoyan Dong, Linling Yu, Yan Sun

Abstract

Bisphenol A (BPA) is a well-recognized endocrine-disrupting chemical that poses risks to both human health and the environment. Laccase can effectively biodegrade bisphenol A, but the low environmental temperature (~25 °C) restricts the biodegradation efficiency. In this study, the enzyme laccase and Fe3O4 with solar–thermal conversion capability were coimmobilized into zeolitic imidazolate framework-8 (Lac@ZIF-8-Fe3O4) to facilitate efficient biodegradation of bisphenol A under simulated solar irradiation. Compared to free laccase, Lac@ZIF-8-Fe3O4 exhibited high activity recovery (115.5%), an ~39% increased catalytic constant, more effective bisphenol A biodegradation (up to 24-fold) at extensive bisphenol A concentrations (5–100 mg/L), excellent thermal stability (50 °C, 12 h), acid-tolerance (pH 3), and storage ability in 10 days. Simulated solar irradiation (1 kW/m2) increased the temperature of Lac@ZIF-8-Fe3O4 solution (10 μg laccase/mL) from 25 to 42.5 °C within 15 min, resulting in 96.4% biodegradation of bisphenol A within 60 min, nearly double the biodegradation efficiency under dark condition (55.9%). Furthermore, Lac@ZIF-8-Fe3O4 maintained 99.0% biodegradation efficiency even after 12 recycles of use under simulated solar irradiation (5 mg/L bisphenol A, 80 min/cycle). This work has thus offered efficient biocatalysis for integrating solar-energy promotion and enzymatic catalysis in treating environmental BPA pollutants. Further, the experimental findings benefited from the development of more sustainable and high-performance immobilized enzyme preparations for pollutant treatment via solar–thermal promotions.

Substances (5)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Citric acid 77-92-9 C6H8O7 1796 suppliers $5.00-$2290.00
Acetic acid 64-19-7 C2H4O2 1628 suppliers $10.00-$8459.00
Sodium acetate 127-09-3 C2H3NaO2 1190 suppliers $8.00-$2170.00
Methanol 67-56-1 CH4O 833 suppliers $9.00-$7620.00
Bisphenol A 80-05-7 C15H16O2 735 suppliers $13.00-$1593.90

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