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Self-Sufficient Aflatoxin Decontamination System: MOF-Based Composite Membrane with Peroxidase-Mimic and Controlled

Xiaofei Cheng1,2, Wenzhong Zhu1, Xueting Zhu1

  • 1School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China.

Toxins
|October 28, 2025
PubMed

Insights

This study introduces a novel PVDF composite membrane with Fe/Co-MOF and CaO2 for efficient aflatoxin removal from milk. The technology achieves over 95% degradation of AFB1 and AFM1, offering a reusable and stable solution for food safety.

Area of Science:

  • Food Science and Technology
  • Materials Science
  • Environmental Chemistry

Background:

  • Aflatoxins B1 (AFB1) and M1 (AFM1) are carcinogenic mycotoxins in dairy products, posing significant food safety risks.
  • Conventional mycotoxin degradation methods suffer from low efficiency and high energy requirements.

Purpose of the Study:

  • To develop an innovative composite membrane for effective and safe removal of aflatoxins from milk.
  • To integrate adsorption and catalytic degradation mechanisms for enhanced mycotoxin detoxification.

Main Methods:

  • Fabrication of a polyvinylidene fluoride (PVDF) composite membrane incorporating Fe/Co-based metal-organic frameworks (Fe/Co-MIL-88B(NH2)) and calcium peroxide (CaO2).
  • Utilizing the hierarchical porous structure of MOFs for adsorption and peroxidase-like catalysis.
  • Employing CaO2 as a controlled hydrogen peroxide donor for reactive oxygen species generation.

Main Results:

  • The composite membrane achieved over 95% degradation efficiency for both AFB1 and AFM1 within 60 minutes.
  • The system demonstrated high operational stability over 10 cycles with minimal nutrient damage to milk.
  • The membrane effectively prevented nanozyme aggregation and ensured uniform distribution of active components.

Conclusions:

  • The developed PVDF/Fe/Co-MOF/CaO2 membrane offers an efficient, reusable, and stable detoxification method for mycotoxins in dairy products.
  • This technology provides a promising approach for aflatoxin mitigation by controlling reactive oxygen species generation.
  • The study highlights the potential for advanced materials in ensuring food safety and preserving milk quality.
Keywords:
aflatoxincomposite membranedegradationmetal-organic frameworksnanozyme

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