Background: Although carbofuran is widely used in agriculture, it is not all
decomposed and remains in crops. And then its toxicity is harmful to humans and animals.
Objective: The objective of this paper was to consider the effect of various parameters in
the preparation process of the Surface Molecularly Imprinting Polymer (SMIP) for the
removal of carbofuran and the adsorption study.
Method: SMIP was prepared by copolymerizing methacrylic acid (MAA) and ethylene
glycol dimethacrylate (EGDMA) on the surface of silica gel particles in the presence of the
carbofuran template molecules. All adsorption experiment were carried out for 5hours
under given conditions.
Results: The results show that toluene is suitable as a pretreatment (mixing) solvent for the
preparation of SMIP and the pretreatment between the template molecule and the
functional monomer was completed in 60 minutes. And the adsorption capacity of SMIP
increase with the increasing initial concentration of carbofuran solution and adsorption
equilibrium time is less than 50 min. adsorption. The adsorption amount is 8.61 mg/g in
adsorption solvent which the ratio of n-hexane to chloroform is 6:1, Maximum adsorption
was observed at a pH range of 5-7.The isotherms were well described by the Freundlich
equilibrium model, and kinetics were well fitted by the pseudo-second-order kinetic model.
Conclusion: In this study, the SMIP was successfully prepared by coating the carbofuran
imprinted polymer on the surface of silica gel particles. The results of adsorption
experiments show that the prepared SMIP has good selectivity and adsorption capacity,
and can effectively remove carbofuran in aqueous solution.