| 磁性壳聚糖复合微球的制备及其Cu~(2+)吸附性能 |
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| 引用本文： | 李建军,鲍旭,吴先锋,Islam Nazrul,刘银,乔尚元,余臻伟,朱金波.磁性壳聚糖复合微球的制备及其Cu~(2+)吸附性能[J].无机化学学报,2017,33(3):383-388. |
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| 作者姓名： | 李建军 鲍旭 吴先锋 Islam Nazrul 刘银 乔尚元 余臻伟 朱金波 |
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| 作者单位： | 安徽理工大学, 材料科学与工程学院, 安徽省现代矿业工程重点实验室, 淮南 232001;伍伦贡大学, 超导与电子材料研究所, 澳大利亚, 新南威尔士州伍伦贡市 2500,安徽理工大学, 材料科学与工程学院, 安徽省现代矿业工程重点实验室, 淮南 232001,安徽理工大学, 材料科学与工程学院, 安徽省现代矿业工程重点实验室, 淮南 232001,伍伦贡大学, 超导与电子材料研究所, 澳大利亚, 新南威尔士州伍伦贡市 2500,安徽理工大学, 材料科学与工程学院, 安徽省现代矿业工程重点实验室, 淮南 232001,安徽理工大学, 材料科学与工程学院, 安徽省现代矿业工程重点实验室, 淮南 232001,伍伦贡大学, 超导与电子材料研究所, 澳大利亚, 新南威尔士州伍伦贡市 2500,安徽理工大学, 材料科学与工程学院, 安徽省现代矿业工程重点实验室, 淮南 232001 |
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| 基金项目： | 国家自然科学基金（No.51374015）、教育部博士点专项基金（No.20133415120004）、安徽省高校自然科学研究重点研究项目（No.KJ2016A189）资助。 |
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| 摘 要： | 以球磨后的粉煤灰磁珠(MS)颗粒为磁核,通过溶胶凝胶法和反相微乳液法依次包覆SiO_2和壳聚糖(CS),制备了MS@SiO_2@CS磁性微球。利用扫描电镜及能量色散谱仪、热重分析仪、红外光谱仪、X射线衍射仪、振动样品磁强计对所得样品的结构和磁性进行了系统表征。结果表明,磁珠颗粒表面实现了逐层包覆,较均匀的分散于壳聚糖基体中,MS@SiO_2@CS微球的比饱和磁化强度可达7.04 emu·g~(-1)。Cu~(2+)离子吸附实验表明,所得磁性壳聚糖微球对Cu~(2+)具有良好的吸附能力,最大吸附量可达11.08 mg·g~(-1);而且可通过磁选法高效固液分离。吸附动力学研究表明,MS@SiO_2@CS微球对Cu~(2+)离子的吸附符合准二级动力学模型,以化学吸附为主。
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| 关 键 词： | 粉煤灰磁珠 磁性壳聚糖 吸附 重金属离子 磁分离 |
| 收稿时间： | 2016/11/8 0:00:00 |
| 修稿时间： | 2016/12/15 0:00:00 |
Magnetic Chitosan Micron Spheres: Synthesis and Adsorption Property for Cu2+ |
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| LI Jian-Jun,BAO Xu,WU Xian-Feng,Islam Nazrul,LIU Yin,QIAO Shang-Yuan,YU Zhen-Wei and 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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| Authors: | LI Jian-Jun BAO Xu WU Xian-Feng Islam Nazrul LIU Yin QIAO Shang-Yuan YU Zhen-Wei and ZHU Jin-Bo |
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| Institution: | 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,Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China,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,Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China,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 and Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, China |
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| 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. |
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| Keywords: | fly ash magneticspheres magnetic chitosan adsorption heavy metal ions magnetic separation |
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