Deciphering sorption kinetics of magnetic MOFs for selective extraction of foodborne contaminants

초록

Magnetic metal-organic framework (MOF) sorbents have emerged as promising materials for food safety due to their ability to selectively extract contaminants, including mycotoxins, pesticides, antibiotics, and industrial pollutants. This review emphasizes MOFs' tunable porosity, high surface area, and chemical versatility, which enable efficient magnetic solid-phase extraction (MSPE) with high selectivity, rapid adsorption kinetics, and straightforward magnetic separation. It discusses functionalized hybrids, particularly Fe3O4-integrated MOFs, that achieve ultra-low detection limits and excellent recoveries across various food matrices. Adsorption typically follows pseudo-second-order kinetics and Langmuir or Freundlich isotherms, indicating chemisorption and multilayer formation. Despite their strong analytical performance, challenges remain regarding hydrolytic stability, scalability, and long-term reusability. Future advancements are likely to come from greener large-scale synthesis, computationally guided MOF design, and integration with automated analytical platforms. Overall, magnetic MOF sorbents offer a sustainable pathway to rapid, selective, and reusable contaminant extraction for real-time food safety monitoring.

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