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Issue 7, 2014
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Ordered mesoporous MnO2 as a synergetic adsorbent for effective arsenic(III) removal

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Abstract

Ordered mesoporous MnO2 nanoarrays were successfully prepared via a vacuum-assisted nanocasting route from an SBA-15 template. To achieve better purification performance for As(III), iron oxides with varied ratios were dispersed into the 2D hexagonal channels, and a series of FeMn-x adsorbents were obtained. Consisting of both iron and manganese oxides, these adsorbents could realize powerful oxidation and effective adsorption of As(III) simultaneously, revealing a synergetic arsenic removal process. The saturation adsorption capacity was 10.55 mg g−1 and >95% adsorption stability could be reached within a relatively short time. Furthermore, owing to the optimum Fe/Mn ratio, the FeMn-2 sample could easily bring the residual concentration down to below 10 ppb, when dealing with trace As(III) concentrations as low as 300 ppb, which provides a convenient method to efficiently capture trace As(III) from water for in-depth purification.

Graphical abstract: Ordered mesoporous MnO2 as a synergetic adsorbent for effective arsenic(iii) removal

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Publication details

The article was received on 21 Sep 2013, accepted on 19 Nov 2013 and first published on 20 Nov 2013


Article type: Paper
DOI: 10.1039/C3TA13790B
Citation: J. Mater. Chem. A, 2014,2, 2374-2382
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    Ordered mesoporous MnO2 as a synergetic adsorbent for effective arsenic(III) removal

    B. Zhi, H. Ding, D. Wang, Y. Cao, Y. Zhang, X. Wang, Y. Liu and Q. Huo, J. Mater. Chem. A, 2014, 2, 2374
    DOI: 10.1039/C3TA13790B

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