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Synthesis of Mesostructured Iron Oxides with Potential As(V) Adsorption Application |
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| Authors: | LI Fei-hu FU Xiao-ru HUANG Jie ZHAI Jian-ping |
| Affiliation: | 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 |
| 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. |
| Keywords: | Mesostructured iron oxide Plugged hexagonal templated silica(PHTS) Nanocasting Arsenate Adsorption |
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