Materials | |
Removal of Chromium(VI) from Aqueous Solutions Using Fe3O4 Magnetic Polymer Microspheres Functionalized with Amino Groups | |
Kai Wang1  Guangming Qiu2  Hongyu Cao1  Ruifa Jin1  | |
[1] Inner Mongolia Key Laboratory of Photoelectric Functional Materials, College of Chemistry and Chemical Engineering, Chifeng University, Chifeng 024000, China;;College of Energy and Power Engineering, Inner Mongolia University of Technology, Huhhot 010051, China | |
关键词: magnetic polymer microspheres; chromium(VI); adsorption; kinetic; isotherms; | |
DOI : 10.3390/ma8125461 | |
来源: mdpi | |
【 摘 要 】
Magnetic polymer microspheres (MPMs) using glycidylmethacrylate (GMA) as a functional monomer were synthesized in the presence of Fe3O4 nanoparticles via dispersion polymerization. After polymerization, the magnetic polymer microbeads were modified with ethylenediamine (EDA). The obtained ethylenediamine-functionalized magnetic microspheres (EDA-MPMs) were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), vibrating-sample magnetometer (VSM) and Fourier transform infrared (FT-IR) spectroscopy. Then the EDA-MPMs were applied as adsorbents for the removal of Cr(VI) from aqueous solution. Langmuir equation was appropriate to describe the experimental data. The maximum adsorption capacities obtained from the Langmuir model were 236.9, 242.1 and 253.2 mg/g at 298, 308 and 318 K, respectively. The Cr(VI) adsorption equilibrium was established within 120 min and the adsorption kinetics was compatibly described by the pseudo-second order equation. The thermodynamic parameters (Δ
【 授权许可】
CC BY
© 2015 by the authors; licensee MDPI, Basel, Switzerland.
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