Effect of Phosphate on the Oxidation of Hydroxysulfate Green Rust

Journal Article · Tue Apr 26 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1923639· OSTI ID:20722171

Benali, Omar ^[1]; Abdelmoula, Mustapha; Genin, Jean-Marie R ^[2]

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1. Laboratoire de Cinetique et Catalyse en Chimie Fine, Faculte des Sciences, Universite Ibn Tofail, BP 133 Kenitra (Morocco)
2. Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, Equipe Microbiologie et Physique, UMR 7564 CNRS-Universite Henri Poincare, 405, rue de Vandoeuvre, F-54600 Villers-les-Nancy (France)

During Hydroxysulfate green rust GR(SO{sub 4}{sup 2}) oxidation, lepidocrocite and goethite were formed. The oxidation of GR(SO{sub 4}{sup 2-}) in the presence of phosphate ions, also involved the formation of poorly crystallized lepidocrocite but not that of goethite. The dissolution of lepidocrocite is inhibited by adsorption of phosphate ions as confirmed by X-ray photoelectron spectroscopy. The formation of the poorly crystallized protective layer against corrosion is effectively due to the phosphate ions which adsorb on the surface of lepidocrocite, and prevents it to turn into a well crystallized oxide.

• OSTI ID: 20722171
• Journal Information: AIP Conference Proceedings, Vol. 765, Issue 1; Conference: International symposium on the industrial applications of the Moessbauer effect, Madrid (Spain), 4-8 Oct 2004; Other Information: DOI: 10.1063/1.1923639; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
CORROSION
DISSOLUTION
GOETHITE
IRON ALLOYS
LAYERS
MOLECULAR IONS
OXIDATION
OXIDES
PHOSPHATES
SULFATES
X-RAY PHOTOELECTRON SPECTROSCOPY