Preparation and Properties of Novel Magnetic Methylene Blue Molecularly Imprinted Polymer

An easy collecting Fe3O4 magnetic methylene blue molecularly imprinted polymer was synthesized via bulk polymerization method. It was found that the adsorption capacity can be increased with increasing of methylene blue concentration. Following a comprehensive characterization, its measured maximum adsorption capacity on methylene blue, for the first time, can be reached to 4860 mg/g, much higher than other adsorbents such as activated carbon, water-absorbent resin etc., and also higher than methylene blue molecularly imprinted polymer prepared in our lab before without the Fe3O4. In addition, the molecularly imprinting technique was confirmed to give a high methylene blue selectivity. From a physical chemistry point of view, the adsorption performance of magnetic methylene blue molecularly imprinted polymer was well represented by the Langmuir equation and agree well with the pseudo-first-order kinetic model. Shown that the adsorption was mainly a monolayer and chemical adsorption process and the rate control steps were mainly liquid film diffusion.