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Publisher: IASEM
Conference information: Proceedings, The 2018 World Congress on Advances in Civil, Environmental, & Materials Research (ACEM18)

Abstract: Magnetic molecularly imprinted polymer nanoparticles (MMIPs) for di(2-ethylhexyl)phthalate (DEHP) were prepared by surface imprinting technology , and used for selective separation of DEHP from aqueous solution. The MIIPs were characterized using Fourier transform infrared spectroscopy, scanning electronic microscopy, thermogravimetric analysis and vibrating sample magnetometer. It was found that the MMIPs had an average diameter of around 33 nm and a saturation magnetization of 15 emu g-1. The adsorption property studies showed that the adsorption of DEHP onto the MMIPs was spontaneous and exothermic, the adsorption equilibrium was achieved within 1 h, the maximum adsorption capacity was 30.7 mg g-1, and the adsorption process could be described by Langmuir isotherm model and pseudo-second-order kinetic model. The MMIPs had good adsorption selectivity for DEHP, the imprinting factor of DEHP was 3.6, and the selectivity coefficient of DEHP with respect to structural analogues, di-n-octyl phthalate (DNOP) and dibutyl phthalate (DBP), were 5.2 and 4.8, respectively. The reusability of MMIPs was demonstrated for at least 8 repeated cycles without significant loss in adsorption capacity for DEHP.
Template and target information: di(2-ethylhexyl)phthalate, DEHP