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Constructing Hierarchically Porous Nestlike Al2O3–MnO2@Diatomite Composite with High Specific Surface Area for Efficient Phosphate Removal

  • Yaran Song
    Yaran Song
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
    University of Chinese Academy of Sciences, Beijing, 100049, China
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  • Peng Yuan*
    Peng Yuan
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
    *Tel.: +86 20 85290341. Fax: +86 20 85290341. E-mail: [email protected]
    More by Peng Yuan
  • Yanfu Wei
    Yanfu Wei
    Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China
    More by Yanfu Wei
  • Dong Liu
    Dong Liu
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
    More by Dong Liu
  • Qian Tian
    Qian Tian
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
    University of Chinese Academy of Sciences, Beijing, 100049, China
    More by Qian Tian
  • Junming Zhou
    Junming Zhou
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
    University of Chinese Academy of Sciences, Beijing, 100049, China
    More by Junming Zhou
  • Peixin Du
    Peixin Du
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
    More by Peixin Du
  • Liangliang Deng
    Liangliang Deng
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
  • Fanrong Chen
    Fanrong Chen
    CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Institutions of Earth Science, Chinese Academy of Sciences (CAS), Guangzhou, 510640, China
    More by Fanrong Chen
  • , and 
  • Honghai Wu
    Honghai Wu
    Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education; School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, China
    More by Honghai Wu
Cite this: Ind. Eng. Chem. Res. 2019, 58, 51, 23166–23174
Publication Date (Web):November 25, 2019
https://doi.org/10.1021/acs.iecr.9b05574
Copyright © 2019 American Chemical Society

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    Abstract

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    In this work, Al2O3–MnO2@diatomite composite (AM-Dt) was prepared by a simple hydrothermal method. This composite was formed by using diatomite as a porous substrate to support Al2O3 and MnO2 nanoparticles. It exhibited hierarchically porous structures and a high specific surface area (352 m2/g). The maximum phosphate adsorption capacity of AM-Dt was 63.7 mg of P/g of (Al2O3–MnO2), which is 6 times greater than those of Al2O3 coated diatomite, Al2O3, and Al2O3–MnO2. The composite also showed superior adsorption efficiency, high structural stability, and selectivity for phosphate in the presence of interfering anions (Cl, NO3, and CO32–). With the help of X-ray photoelectron spectroscopy and P K-edge X-ray absorption near-edge structure analysis, it can be concluded that electrostatic attraction and formation of surface complexes via phosphate bonding with Al2O3 and MnO2 were the main adsorption mechanisms. The facile preparation method, excellent adsorption performance, and cost effectiveness suggested that this composite possesses a promising potential for phosphate removal from contaminated water.

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.iecr.9b05574.

    • XRD patterns, SEM images, ζ potential, XPS analysis, XRF results, effect of initial pH values, and adsorption models of AM-Dt and control materials (PDF)

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