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Magnetic Chitosan Micron Spheres: Synthesis and Adsorption Property for Cu2+
Author NameAffiliationE-mail
LI Jian-Jun Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China
Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong NSW 2500, Australia 
ljjhero4@gmail.com 
BAO Xu Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China  
WU Xian-Feng Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China  
Islam Nazrul Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong NSW 2500, Australia  
LIU Yin Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China  
QIAO Shang-Yuan Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China  
YU Zhen-Wei Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong NSW 2500, Australia  
ZHU Jin-Bo Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China  
Abstract: MS@SiO2@CS magnetic micron spheres were fabricated by successively coating the ball-milled coal fly ash magneticsphere(MS) particles with SiO2 and chitosan(CS) through a sol-gel and an inverse microemulsion method, respectively. The structures and properties were carefully characterized by scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS), thermogravimetric analysis(TGA), Fourier transform infrared spectroscopy(FTIR), X-ray diffraction(XRD), and vibrating sample magnetometer(VSM). The results showed that the MS particles were coated layer by layer of SiO2 and CS,respectively, and relative evenly distributed in the CS substrate. Since MSs are magnetic, the MS@SiO2@CS samples also show relatively strong magnetism with a specific saturation magnetization of 7.04 emu·g-1. Adsorption experiments indicated that the magnetic composite micronspheres showed the good adsorption capability for Cu2+ ions, and the adsorption capacity was up to 11.08 mg·g-1. In addition, after Cu2+ adsorption, the adsorbents could be separated effectively from water by magnetic separation. According to the adsorption kinetics simulation, the Cu2+ adsorption of MS@SiO2@CS corresponds to pseudo second order kinetics, which implies a dominant chemical adsorption.
Keywords: fly ash magneticspheres  magnetic chitosan  adsorption  heavy metal ions  magnetic separation
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LI Jian-Jun,BAO Xu,WU Xian-Feng,Islam Nazrul,LIU Yin,QIAO Shang-Yuan,YU Zhen-Wei,ZHU Jin-Bo.Magnetic Chitosan Micron Spheres: Synthesis and Adsorption Property for Cu2+[J].Chinese Journal of Inorganic Chemistry,2017,33(3):383-388.
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Chinese Journal of Inorganic Chemistry