alexa Iron species in layered clay: efficient electron shuttles for simultaneous conversion of dyes and Cr(VI).


Journal of Civil & Environmental Engineering

Author(s): Liu R, Guo Y, Wang Z, Liu J

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Abstract The simultaneous reduction of Chromium(VI) (Cr(VI)) and oxidation of cationic dyes in dispersions of Montmorillonite K10 (MK10) were examined under visible irradiation (λ>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. Copyright © 2013 Elsevier Ltd. All rights reserved. This article was published in Chemosphere and referenced in Journal of Civil & Environmental Engineering

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