Determination of Adsorption Capacity of Novel Molecularly Imprinted Materials for Herbicides

Abstract

In order to improve the traditional method of adsorbing water residues and improve the adsorption efficiency, we prepared molecularly imprinted polymer modified by eutectic solvent and estabLish molecularly imprinted polymer adsorbent based on eutectic solvent. Based on the standard curve of atrazine, the adsorption capacity of the molecularly imprinted materials for atrazine was determined. It is beneficial for the preparation of molecularly imprinted materials based on eutectic solvent and the feasibiLity of their appLication in herbicide adsorption. Methods: using choLine chloride and methacryLic acid to prepare low melting solvent, atrazine as template molecule, molecularly imprinted polymer was prepared. Using this kind of molecularly imprinted polymer as adsorbent, the following experiments were carried out: 1. The standard curve of atrazine was drawn by HPLC; 2. The adsorption capacity of the new molecularly imprinted polymer was tested; 3. The reusabiLity of the adsorption material was verified. Results: through the static and dynamic adsorption capacity experiments, des-mip had the highest adsorption performance, and showed better absorption effect than MIP. In the reusability experiment, des-mip shows better recovery under the premise of introducing des. The intra day and inter day recoveries of des-mip were 74.9% - 78.8% and 83.8% - 86.8%, respectively. The intra day and inter day recoveries of aa-mip were 69.2% - 72.3% and 68.5% - 71.9%, respectively. The relative standard deviation of des-mip and aa-mip was less than 2%. The reusability of des-mip and aa-mip is verified. Conclusion: the molecular imprinted polymer with eutectic solvent has better herbicide removal ability than the other three materials.