关键词: 分子印迹, 氯氰菊酯, 吸附

Abstract:

A cypermethrin-imprinted polymer (CIP) with high selectivity was developed by using molecular imprinting technique with methacrylic acid as functional monomer and ethylene glycoldimethacrylate as crosslinker. The selectivity and affinity of CIP were evaluated by adsorption equilibrium experiments. Results showed that cypermethrin-imprinted polymer exhibits higher affinity to cypermethrin compared to non-imprinted polymer. Scatchard analysis indicated that two recognition sites exist in cypermethrin-imprinted polymer molecular. The Kd (dissociation constant) and Qmax (maximum apparent adsorption quantity) of the site with higher affinity are 3.604×10-4 mol/L and 53.045 μmol/g, respectively, while those of the site with lower affinity are 1.8015×10-3 mol/L and 116.61 μmol/g, respectively. These results in this study showed that the cypermethrin-imprinted polymer is able to recognize and selectively absorb cypermethrin.

Key words: molecular imprinting technique, cypermethrin, adsorption