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Published November 13, 1987 | public
Book Section - Chapter

Mn(II) Oxidation in the Presence of Lepidocrocite: The Influence of Other Ions

Abstract

Mn(II) oxidation is enhanced in the presence of lepidocrocite (γ-FeOOH). The oxidation of Mn(II) on γ-FeOOH can be understood in terms of the coupling of surface coordination processes and redox reactions on the surface. Ca^(2+), Mg^(2+), Cl^- , SO_4^(2-), phosphate, silicate, salicylate, and phthalate affect Mn(II) oxidation in the presence of γ-FeOOH. These effects can be explained in terms of the influence these ions have on the binding of Mn(II) species to the surface. Extrapolation of the laboratory results to the conditions prevailing in natural waters predicts that the factors which most influence Mn(II) oxidation rates are pH, temperature, the amount of surface, ionic strength, and Mg^(2+) and Cl^- concentrations.

Additional Information

© 1986 American Chemical Society. Received June 25, 1986. Published in print 13 November 1987. I would like to thank Dr. J.J. Morgan for his advice and contributions to this work. I also thank the Jessie Smith Noyes Foundation and the Office of Ocean Assessment, Ν0ΑΑ for financial support.

Additional details

Created:
August 19, 2023
Modified:
January 14, 2024