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    A band structure framework for understanding sorption processes : the role of Mn (III) in Cr (III) oxidation

    Author
    Wang, Chenying
    View/Open
    Wang_rpi_0185N_11745.pdf (1.398Mb)
    Other Contributors
    Chakrapani, Vidhya; Underhill, Patrick T.; Shi, Sufei;
    Date Issued
    2020-08
    Subject
    Chemical engineering
    Degree
    MS;
    Terms of Use
    This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute (RPI), Troy, NY. Copyright of original work retained by author.;
    Metadata
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    URI
    https://hdl.handle.net/20.500.13015/6166
    Abstract
    In the natural environment, manganese oxide is known for its excellent adsorption properties and strong oxidation ability. The interaction between Cr and Mn oxides is complex, which is not only due to the absorption and oxidation of Cr, but also due to the reduction and acid dissolution of the surface Mn cations. One of unusual property of certain phases of Mn oxide mineral is its ability to oxidize less toxic Cr (III) to more toxic Cr (VI). Oxidation of Cr (III) to Cr (VI) can significantly increase the mobility and toxicity of chromium, thus exacerbating its potential threat to the environment and water quality. Our results indicate that the high affinity of birnessite mineral (MnO2) for Cr (III) oxidation is due to its unusually large work function and electron affinity, which promotes electron injection from chemical species such as Cr (III) into the conduction band of the oxide.;
    Description
    August 2020; School of Engineering
    Department
    Dept. of Chemical and Biological Engineering;
    Publisher
    Rensselaer Polytechnic Institute, Troy, NY
    Relationships
    Rensselaer Theses and Dissertations Online Collection;
    Access
    Restricted to current Rensselaer faculty, staff and students in accordance with the Rensselaer Standard license. Access inquiries may be directed to the Rensselaer Libraries.;
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    • RPI Theses Online (Complete)

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