Abstract
In this article, ion-imprinting technology was used to prepare the lanthanum ion-imprinted polymer, La-IIP-MAA/Fe3O4-GO with magnetic graphene oxide as a carrier and methacrylic acid as a functional monomer. A series of characterizations were performed on the imprinted materials, the adsorptive and selective properties of the imprinted materials for lanthanum ions were explored, and the adsorption process was analyzed with respect to kinetics and thermodynamics. Finally, the reusability of the imprinted materials was studied. The results show that La-IIP-MAA/Fe3O4-GO has good adsorption effects for lanthanum ions, and adsorption equilibrium can be attained in about 20 min. When pH is 6 and the temperature is 35 °C, the adsorption capacity reaches 110.98 mg/g. The adsorption process of lanthanum ions is pretty much in line with the quasi-second-order kinetic model and Freundlich isotherm adsorption model. La-IIP-MAA/Fe3O4-GO has good selectivity to lanthanum ions and maintains good effects after repeated use five times.
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