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Preparation and characterization of magnetic nanomaterial and its application for removal of polycyclic aromatic hydrocarbons
- Zhou, Qingxiang, Wang, Yuqin, Xiao, Junping, Fan, Huili, Chen, Chunmao
- Journal of hazardous materials 2019 v.371 pp. 323-331
- Fourier transform infrared spectroscopy, X-ray diffraction, adsorbents, adsorption, benzo(a)pyrene, endothermy, iron oxides, magnetism, microstructure, models, nanoparticles, polycyclic aromatic hydrocarbons, polymerization, polymers, scanning electron microscopy, sorption isotherms, thermodynamics, transmission electron microscopy, van der Waals forces
- Fe3O4@polyaniline, a Fe3O4-based magnetic core-shell material, was synthesized and its morphology and microstructure were characterized with transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and vibrating sample magnetometry. Polyaniline was modified onto the surface of Fe3O4 nanoparticles by a self-assembly method based on a two-step oxidative polymerization method. The new materials exhibited good adsorption to polycyclic aromatic hydrocarbons such as fluoranthene, pyrene and benzo[a]pyrene from environmental water samples due to the high affinities of polyaromatic hydrocarbons to polyaniline via π−π and van der Waals interactions. The experimental results indicate that the adsorption of polyaromatic hydrocarbons follows pseudo-second order kinetics and the adsorption isotherms conform to a Langmuir isotherm model. The thermodynamic parameters for polyaromatic hydrocarbons indicate that the adsorption process is spontaneous and endothermic in nature, but adsorption occurs via non-covalent interactions. This study indicated that the Fe3O4@polyaniline hybrid core-shell structure was proved to be a good adsorbent for polyaromatic hydrocarbons while exhibiting simple preparation, easy separation, low cost, high reusability and great potential applicability for removal of polyaromatic hydrocarbons from water.