Performances of Methyl Blue and Arsenic(V) Adsorption from Aqueous Solution onto Magnetic 0.8Ni0.5Zn0.5Fe2O4/0.2SiO _{详细信息    查看全文}

• 作者：Ruijiang Liu ; Xiangqian Shen ; Hongxia Li ; Xinai Zhang…
• 关键词：0.8Ni0.5Zn0.5Fe2O4/0.2SiO2 ; Nanocomposite ; Methyl blue ; MB ; As(V) ; Adsorption kinetics ; Adsorption isotherm
• 刊名：Water, Air, and Soil Pollution
• 出版年：2014
• 出版时间：May 2014
• 年：2014
• 卷：225
• 期：5
• 全文大小：1,090 KB
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Terrestrial Pollution
  Hydrogeology
  
• 出版者：Springer Netherlands
• ISSN：1573-2932

文摘

Magnetic 0.8Ni0.5Zn0.5Fe2O4/0.2SiO2 nanocomposites were prepared by the facile citrate-gel thermal decomposition process. Their microstructure and magnetic properties were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), and vibrating sample magnetometer (VSM). The as-prepared magnetic 0.8Ni0.5Zn0.5Fe2O4/0.2SiO2 nanocomposites were characterized with about 8-nm grains, specific surface area of 119.3?m2/g, and magnetization of 38.7?Am2/kg. The adsorption kinetics and adsorption isotherms of methyl blue (MB) and As(V) onto the magnetic 0.8Ni0.5Zn0.5Fe2O4/0.2SiO2 nanocomposites at room temperature were investigated. Adsorption kinetics of MB and As(V) onto the magnetic 0.8Ni0.5Zn0.5Fe2O4/0.2SiO2 nanocomposites have been researched using pseudo-first-order, pseudo-second-order, and intraparticle diffusion models, the statistic results show that the pseudo-second-order kinetic model is fitted well to describe the MB and As(V) adsorption process. The adsorption equilibrium data of MB and As(V) onto the magnetic 0.8Ni0.5Zn0.5Fe2O4/0.2SiO2 nanocomposites at room temperature were analyzed with Langmuir, Freundlich, and Temkin models, and the adsorption isotherms was more effectively described by the Freundlich model based on the values of the correlation coefficient. Figure The magnetic 0.8Ni0.5Zn0.5Fe2O4/0.2SiO2 nanocomposites were prepared by the citrate-gel thermal decomposition process. They show high adsorption capacities for methyl blue (MB) and arsenic(V) in aqueous solution, and the adsorption kinetics and isothermals were analyzed.