CRCU

Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (4): 559-562.

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Synthesis of Mesostructured Iron Oxides with Potential As(V) Adsorption Application

LI Fei-hu1, FU Xiao-ru1, HUANG Jie1, ZHAI Jian-ping 2   

  1. 1. Jiangsu Provincial Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, P. R. China;
    2. State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, P. R. China
  • Received:2011-10-10 Revised:2012-05-14 Online:2012-07-25 Published:2012-07-25
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.51002080), the Research Funds of Nanjing University of Information Science and Technology(NUIST), China(No.S8108179001), the College Students Practice Innovative Projects of Jiangsu Province, China(No.N1885010087) and the Priority Academic Program Development of Jiangsu Higher Education Institutions, China.

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Abstract: Mesostructured iron oxides(MIOs) were nanocasted from a plugged hexagonal templated silica(PHTS) with a Brunauer-Emmett-Teller(BET) surface area of 694 m2/g. Results of X-ray diffraction(XRD), transmission electron microscopy(TEM) and N2 adsorption-desorption suggest that the nanocasted MIOs are synthetic hematite(α-Fe2O3) with a wormhole-like mesoporous network. As(V) adsorption test shows that the selected MIO—MIO-500(calcinated at 500℃) with a BET surface area of 82 m2/g has a maximum adsorption capacity of 5.39 mg/g for As(V), which is 2.5 times as large as that of natural hematite adsorbent. The study suggests that MIOs could be potentially used as the adsorbent of As(V) in wastewater.

Key words: Mesostructured iron oxide, Plugged hexagonal templated silica(PHTS), Nanocasting, Arsenate, Adsorption