Journal
CHEMOSPHERE
Volume 95, Issue -, Pages 643-646Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2013.09.055
Keywords
Layered clay; Visible light; Electron transfer; Structural iron
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Funding
- Fundamental Research funds for Central Universities Central [12D11317, 13D111312]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [CRRF11023]
- National Science Foundation of China [21007009, 41273108]
- Chen Guang project [10CG34]
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The simultaneous reduction of Chromium(VI) (Cr(VI)) and oxidation of cationic dyes in dispersions of Montmorillonite K10 (MK10) were examined under visible irradiation (lambda > 420 nm). The iron species (i.e. iron oxides, structural iron and exchangeable interlayer iron) in layered clays are active for catalytically reducing Cr(VI) by using Malachite green (MG) and Rhodamine B (RhB) as the electron donors. Molecular oxygen does not have a significant effect on clay-catalyzed Cr(VI) reduction, but is important for oxidative degradation of dye pollutants. MK10 catalysts are stable and reusable, and are therefore considered as a promising naturally-abundant material for decontamination of dye and heavy metals. (C) 2013 Elsevier Ltd. All rights reserved.
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