Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 34, Pages 30542-30550Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b08011
Keywords
metal-organic framework; biomimetic catalysis; membrane; aflatoxin; peroxidase; degradation; detoxification
Funding
- National Key Research and Development Plan of China [2017YFC1600906]
- National Natural Science Foundation of China [21878306]
- Youth Innovation Promotion Association of Chinese Academy of Sciences [2017069]
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Biodegradation is a mild and efficient way to protect humans and animals from mycotoxins. However, microbes and enzymes are susceptible to environmental change, lack of stability, and reusability. In this work, three peroxidase-like metal-organic frameworks (MOFs), as artificial substitutes of natural peroxidase, are used for aflatoxin B-1 (AFB(1)) removal, demonstrating the strong removal ability for AFB(1) and anti-interference ability toward other substances. There are distinct adsorption and catalytic properties among these MOFs that are mainly because of the differences in structure and Fe ion active sites. Then, we immobilized these MOFs into ultrafiltration membranes to form a multifunctional membrane (i.e., filtration, adsorption, and catalysis) for AFB, removal with good reusability that can be operated in simultaneous adsorption/catalysis or adsorption followed by catalysis/regeneration modes. Physicochemical analysis and animal experiments showed that the degradation products are probably several low-carbon substances whose toxic groups are cleaved.
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