Linking mineral reactivity to its semiconducting band structure

Authors
Cantone, David, M.
ORCID
https://orcid.org/0009-0008-8753-7009
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Other Contributors
Hedden, Ronald
Woodcock, Corey
Chakrapani, Vidhya
Issue Date
2023-05
Keywords
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.
Full Citation
Abstract
Certain transition metal oxides are known to readily reduce chromium ion from its highly toxic +VI oxidation state to its +III state, which is an important nutrient for human biological functions. Herein, the factors which govern the reduction of Cr (VI) to Cr (III) by five selected Fe and Mn based metal oxides were investigated in order to better understand the mechanism driving the reduction. Results show that of the five metal oxides (hematite, hollandite, magnetite, manganite, and Romanechite), only Romanechite displayed the capability of reducing the concentration of Cr (VI) in isolation. This distinctive capability is likely related to their differences in their electronic properties, namely the differing band alignment with respect to Cr (VI) / Cr (III) redox couple in the aqueous environment.
Description
May2023
School of Engineering
Department
Dept. of Chemical and Biological Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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Users may download and share copies with attribution in accordance with a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 license. No commercial use or derivatives are permitted without the explicit approval of the author.
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