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The Reduction of Chromate Ions by Fe(II) Layered Hydroxides : Volume 3, Issue 4 (30/11/-0001)

By Loyaux-lawniczak, S.

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Book Id: WPLBN0003978768
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: The Reduction of Chromate Ions by Fe(II) Layered Hydroxides : Volume 3, Issue 4 (30/11/-0001)  
Author: Loyaux-lawniczak, S.
Volume: Vol. 3, Issue 4
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Refait, P., Ehrhardt, J., Lecomte, P., Génin, J. R., & Loyaux-Lawniczak, S. (-0001). The Reduction of Chromate Ions by Fe(II) Layered Hydroxides : Volume 3, Issue 4 (30/11/-0001). Retrieved from http://hawaiilibrary.net/


Description
Description: Laboratoire de Chimie Physique pour L'Environment, UMR 7564 CNRS-Univ. H. Poincaré - Nancy 1, 405, rue de Vandoeuvre, F 54600 Villers-lès-Nancy, France. The reduction of chromate ions by Fe(OH)2 and the iron (II)-iron (III) hydroxysulphate green rust, GR(SO42-), was studied to evaluate whether such synthetic layered hydroxides and the corresponding natural green rust mineral could be involved in the natural attenuation of contaminated environments. The resulting Cr (III) bearing phases, which would govern the subsequent behaviour of chromium, were clearly characterised. Both compounds proved to be very reactive and oxidised instantaneously while chromate ions were reduced to Cr (III) as evidenced by X-ray photoelectron spectroscopy. Mass balance (ICP-AES) demonstrated that the Fe/Cr ratio inside the solid end product was equal to the initial Fe/Cr ratio. The solid phases, analysed by X-ray diffraction, Raman and Mossbauer spectroscopies were identified as Cr-substituted poorly crystallised iron (III) oxyhydroxides in both cases, more precisely δ-FeOOH when starting with Fe(OH)2 and ferrihydrite when starting with GR(SO42-).

Summary
The reduction of chromate ions by Fe(II) layered hydroxides

 

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