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  • Title: Sea-urchin-like iron oxide nanostructures for water treatment.
    Author: Lee HU, Lee SC, Lee YC, Vrtnik S, Kim C, Lee S, Lee YB, Nam B, Lee JW, Park SY, Lee SM, Lee J.
    Journal: J Hazard Mater; 2013 Nov 15; 262():130-6. PubMed ID: 24021165.
    Abstract:
    To obtain adsorbents with high capacities for removing heavy metals and organic pollutants capable of quick magnetic separation, we fabricated unique sea-urchin-like magnetic iron oxide (mixed γ-Fe2O3/Fe3O4 phase) nanostructures (called u-MFN) with large surface areas (94.1m(2) g(-1)) and strong magnetic properties (57.9 emu g(-1)) using a simple growth process and investigated their potential applications in water treatment. The u-MFN had excellent removal capabilities for the heavy metals As(V) (39.6 mg g(-1)) and Cr(VI) (35.0 mg g(-1)) and the organic pollutant Congo red (109.2 mg g(-1)). The u-MFN also displays excellent adsorption of Congo red after recycling. Because of its high adsorption capacity, fast adsorption rate, and quick magnetic separation from treated water, the u-MFN developed in the present study is expected to be an efficient magnetic adsorbent for heavy metals and organic pollutants in aqueous solutions.
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