Aflatoxin B1-targeted molecularly imprinted biochar, and preparation method and application thereof

By magnetically modifying and coating biochar prepared from camellia seed meal residue with SiO2, and combining it with molecular imprinting technology, molecularly imprinted biochar for targeted adsorption of aflatoxin B1 was prepared. This solved the problem of poor adsorption specificity of camellia seed meal biochar and achieved efficient targeted adsorption and regenerable adsorption of aflatoxin B1.

CN122399759APending Publication Date: 2026-07-17HENAN AGRICULTURAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN AGRICULTURAL UNIVERSITY
Filing Date
2026-04-10
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing camellia seed meal biochar exhibits poor specificity in targeted adsorption of aflatoxin B1, is easily affected by impurities, and has insufficient adsorption efficiency and selectivity, making it difficult to achieve efficient targeted adsorption.

Method used

By magnetically modifying and coating biochar prepared from camellia seed meal residue with SiO2, and combining it with molecular imprinting technology, molecularly imprinted biochar that targets aflatoxin B1 was prepared, forming specific recognition sites and improving adsorption performance.

Benefits of technology

It achieves highly efficient targeted adsorption of aflatoxin B1, with an adsorption capacity of up to 200.02 ng/mg, and has good magnetic separation characteristics and renewability, making it suitable for pollution control of agricultural and forestry products.

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Abstract

The application provides a molecule imprinting biochar for targeted adsorption of aflatoxin B1 and a preparation method and application thereof, and belongs to the technical field of functional biochar.The application takes oil tea pomace residue after solvent extraction as raw material, first prepares biochar COBC through pyrolysis, then obtains magnetic biochar F-COBC through magnetic modification, then obtains SF-COBC through SiO2 coating, finally takes SF-COBC as a carrier, 5,7-dimethyl coumarin as an aflatoxin B1 simulation template molecule, and performs polymerization reaction on the surface of SF-COBC with the aid of a functional monomer, a crosslinking agent and an initiator, elutes the template molecule, and obtains the molecule imprinting biochar.The molecule imprinting biochar has specific recognition sites for aflatoxin B1, has excellent targeted adsorption performance, and the adsorption amount of the molecule imprinting biochar for aflatoxin B1 can reach 200.02 ng / mg in 80 min, the molecule imprinting biochar is convenient to recover, the adsorption rate can still reach 76% after 5 cycles, and the molecule imprinting biochar can be effectively applied to the adsorption and removal of aflatoxin B1 in agricultural and forestry products, thereby providing a new scheme for the treatment of fungal toxins in the field of food safety.
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