Synthesis of novel magnetic molecularly imprinted polymers by solid-phase extraction method for removal of norfloxacin

An operative and effective surface imprinted polymer with great adsorption capacity, ability and selectivity was synthesized. The magnetic molecularly imprinted polymers (MMIP) composites were effectively fabricated and cross-linked by Fe3O4 (magnetite particles) coated with oleic acid using methacrylic acid as functional monomer, ethylene glycoldimethacrylate (EGDMA) as cross-linking agent and 2,2-azobisisobutyronitrile (AIBN) as initiator in surface imprinting techniques. In such a way the selective removal of aqueous norfloxacin in effluent water and drinking water was demonstrated through (NORF-MMIP) on the basis of surface molecular imprinting skill and magnetic separation to control contamination in the atmosphere. The morphological composition and elemental structure of synthesized Norf-MMIP was examined by using scanning electron microscopy (SEM), Fourier transformed infrared spectroscopy (FTIR) and energy dispersive X-ray spectroscopy (EDX) techniques. The thermal stability of magnetic molecularly imprinted polymer (M-MIP) was investigated through thermogravimetric analysis (TGA). The Norf-MMIP is very stable up to 600 degrees C temperature. The adsorption performance of Norf-MMIP at 25 degrees C was estimated by adsorption experiments comprising isothermal study, Kinetic study and selectivity tests. The extreme adsorption capacity of Norf-MMIP at 35 degrees C was 42.34 mg/g while rate constant was 0.0433 K/min. In selective recognition test, the Norf-MMIP showed the uppermost selectivity among four antibiotic drugs. The prepared Norf-MMIP has a high potential in recognition and separation of norfloxacin due to the stable temperature response, adsorption capacity, selectivity and reusability.