Journal
CHEMICAL ENGINEERING JOURNAL
Volume 218, Issue -, Pages 108-115Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2012.12.030
Keywords
Fe3O4 nanoparticles; Graphene oxide; Magnetic solid-phase extraction; PCB 28; Trace levels
Categories
Funding
- Natural Science Foundation of Zhejiang Province [LY12C20004, Y3110479]
- Natural Science Foundation of Ningbo [2011A610018, 2012A610144]
- KC Wong Magna Fund in Ningbo University
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In this paper, Fe3O4 nanoparticle (Fe3O4 NPs) grafted graphene oxide (Fe3O4@GO), are successfully synthesized and used for the extraction of 2,4,4'-trichlorobiphenyl (PCB 28) from a large volume of water solution. With the magnetic solid-phase extraction (MSPE) technique based on the Fe3O4@GO sorbents, it requires only 30 min to extract trace levels of PCB 28 from 200 mL water samples. The Fe3O4@GO was analyzed by using powder X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier Transform infrared (FT-IR) spectroscopy, and Vibrating sample magnetometer (VSM), specific surface area analyzer. The adsorption kinetics, adsorption capacity of the adsorbent, and the effect of the solution pH and desorption conditions on the removal efficiency of PCB 28 were investigated. The second-order kinetic equation best describes the sorption kinetics. The results showed that Fe3O4@GO was a suitable material in the pre-concentration and immobilization of PCB 28 from large volumes of aqueous solutions in polychlorinated biphenyl pollution cleaning. (C) 2012 Elsevier B.V. All rights reserved.
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