| Synergistic Adsorption by Biomass-based Fe-Al (Hydr)oxide Nanocomposite of Fluoride and Arsenic |
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| Author Name | Affiliation | | DaYong Huang1,2 | 1. National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
2. University of Chinese Academy of Sciences, Beijing ,100049, China | | BoXuan Li1,* | 1. National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
2. University of Chinese Academy of Sciences, Beijing ,100049, China | | Min Wu1,* | 1. National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
2. University of Chinese Academy of Sciences, Beijing ,100049, China | | Shigenori Kuga1 | 1. National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
2. University of Chinese Academy of Sciences, Beijing ,100049, China | | Yong Huang1,* | 1. National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
2. University of Chinese Academy of Sciences, Beijing ,100049, China |
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| Fund Project:This study was supported by the National Natural Science Foundation of China (No. 51472253), National Key Project of Research and Development Plan (2016YFC1402500) and Chinese Academy of Sciences Visiting Professorships. |
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| Abstract:Fe-Al (hydr)oxide nano-/micro-particles were well grown and dispersed on a wheat straw template, which was characterized by a scanning electron microscope (SEM) with energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and a vibrating sample magnetometer (VSM). The adsorption mechanism of the biomass-based Fe-Al (hydr)oxide nanocomposite was studied by the adsorption isotherms, which followed the Langmuir model better than the Freundlich and Temkin models. In particular, a synergistic adsorption by the mixed Fe-Al (hydr)oxide nano-/micro-particles based on the wheat straw was found, with higher maximum adsorption capacity (Q0) than that of the material containing only Fe3O4 or Al(OH)3 nano-/micro-particles, which was most obvious when the mole ratio of Fe to Al was 1:1. The degree of this unusual effect was reasonably determined by the departure between the experimental and calculated maximum adsorption capacity (Q0-Q0(cal)), which showed that the synergistic effect was most pronounced when the mole ratio of Fe to Al was approximately 1:1. The good adsorption capacity of the mixed Fe-Al (hydr)oxide nano-/micro-particles and the good dispersity by the wheat straw matrix were combined in the biomass-based Fe-Al (hydr)oxide nanocomposite. The nanocomposite material showed high adsorption capacity for both fluoride (F) and arsenic (As(III) and As(V)), and had the advantage of magnetic separation by tuning its compositions. |
| keywords:adsorption synergistic effect nanocomposite biomass fluoride arsenic |
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