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Title: Conditions for the formation of pure birnessite during the oxidation of Mn(II) cations in aqueous alkaline medium

Abstract

Birnessite was synthetized through redox reaction by mixing MnO{sub 4}{sup -}, Mn{sup 2+} and OH{sup -} solutions. The Mn(VII): Mn(II) ratio of 0.33 was chosen and three methods were used consisting in a quick mixing under vigorous stirring of two of the three reagents and then on the dropwise addition of the third one. The obtained solids were characterized by XRD, FTIR and XPS spectroscopies. Their average oxidation states were determined from ICP and CEC measurements while their surface properties were investigated by XPS. This study provides an increased understanding of the importance of dissolved oxygen in the formation of birnessite and hausmannite and shows the ways to obtain pure birnessite. The role of counter-ion ie. Na{sup +} or K{sup +} was also examined. - Graphical abstract: Pathways of birnessite formation. - Highlights: • Pure birnessite is prepared through a redox reaction. • Hausmannite formation is prevented by controlling dissolved O2. • The employed counterion influences the purity of birnessite. • Initial Mn(OH){sub 2} is oxidized by both MnO{sub 4}{sup -} and dissolved O{sub 2}.

Authors:
 [1];  [2];  [3];  [4];  [5];  [4];
  1. Laboratoire de Chimie des Matériaux et Catalyse, Faculté des Sciences de Tunis, Université El Manar (Tunisia)
  2. (LCPME)-UMR 7564, CNRS-Université de Lorraine, 405, rue de Vandoeuvre, 54600 Villers-lès-Nancy (France)
  3. (INSAT), Université de Carthage, Tunis (Tunisia)
  4. Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME)-UMR 7564, CNRS-Université de Lorraine, 405, rue de Vandoeuvre, 54600 Villers-lès-Nancy (France)
  5. Institut Jean Lamour, Centre de Compétences Rayons X et Spectroscopie (X-Gamma), UMR 7198 CNRS-Université de Lorraine (France)
Publication Date:
OSTI Identifier:
22658235
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 248; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DISSOLVED GASES; FOURIER TRANSFORMATION; IMPURITIES; INFRARED SPECTRA; MANGANESE HYDROXIDES; MANGANESE IONS; OXIDATION; POTASSIUM IONS; REDOX REACTIONS; SODIUM IONS; SURFACE PROPERTIES; SYNTHESIS; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Boumaiza, Hella, Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, Département de Génie Biologique et Chimique, Institut National des Sciences Appliquées et de Technologies, Coustel, Romain, Medjahdi, Ghouti, Ruby, Christian, E-mail: Christian.ruby@univ-lorraine.fr, and and others. Conditions for the formation of pure birnessite during the oxidation of Mn(II) cations in aqueous alkaline medium. United States: N. p., 2017. Web. doi:10.1016/J.JSSC.2017.01.014.
Boumaiza, Hella, Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, Département de Génie Biologique et Chimique, Institut National des Sciences Appliquées et de Technologies, Coustel, Romain, Medjahdi, Ghouti, Ruby, Christian, E-mail: Christian.ruby@univ-lorraine.fr, & and others. Conditions for the formation of pure birnessite during the oxidation of Mn(II) cations in aqueous alkaline medium. United States. doi:10.1016/J.JSSC.2017.01.014.
Boumaiza, Hella, Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, Département de Génie Biologique et Chimique, Institut National des Sciences Appliquées et de Technologies, Coustel, Romain, Medjahdi, Ghouti, Ruby, Christian, E-mail: Christian.ruby@univ-lorraine.fr, and and others. Sat . "Conditions for the formation of pure birnessite during the oxidation of Mn(II) cations in aqueous alkaline medium". United States. doi:10.1016/J.JSSC.2017.01.014.
@article{osti_22658235,
title = {Conditions for the formation of pure birnessite during the oxidation of Mn(II) cations in aqueous alkaline medium},
author = {Boumaiza, Hella and Laboratoire de Chimie Physique et Microbiologie pour l'Environnement and Département de Génie Biologique et Chimique, Institut National des Sciences Appliquées et de Technologies and Coustel, Romain and Medjahdi, Ghouti and Ruby, Christian, E-mail: Christian.ruby@univ-lorraine.fr and and others},
abstractNote = {Birnessite was synthetized through redox reaction by mixing MnO{sub 4}{sup -}, Mn{sup 2+} and OH{sup -} solutions. The Mn(VII): Mn(II) ratio of 0.33 was chosen and three methods were used consisting in a quick mixing under vigorous stirring of two of the three reagents and then on the dropwise addition of the third one. The obtained solids were characterized by XRD, FTIR and XPS spectroscopies. Their average oxidation states were determined from ICP and CEC measurements while their surface properties were investigated by XPS. This study provides an increased understanding of the importance of dissolved oxygen in the formation of birnessite and hausmannite and shows the ways to obtain pure birnessite. The role of counter-ion ie. Na{sup +} or K{sup +} was also examined. - Graphical abstract: Pathways of birnessite formation. - Highlights: • Pure birnessite is prepared through a redox reaction. • Hausmannite formation is prevented by controlling dissolved O2. • The employed counterion influences the purity of birnessite. • Initial Mn(OH){sub 2} is oxidized by both MnO{sub 4}{sup -} and dissolved O{sub 2}.},
doi = {10.1016/J.JSSC.2017.01.014},
journal = {Journal of Solid State Chemistry},
number = ,
volume = 248,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2017},
month = {Sat Apr 15 00:00:00 EDT 2017}
}