Oxidative removal of Mn(II) from solution catalysed by the γ-FeOOH (lepidocrocite) surface
- Creators
- Sung, Windsor
- Morgan, James J.
Abstract
A laboratory study was undertaken to ascertain the role of surface catalysis in Mn(II) oxidative removal. γ-FeOOH, a ferric oxyhydroxide formed by O2 oxidation of ferrous iron in solution, was studied in the following ways: surface charge characteristics by acid base titration, adsorption of Mn(II) and surface oxidation of Mn(II). A rate law was formulated to account for the effects of pH and the amount of surface on the surface oxidation rate of Mn(II). The presence of milli-molar levels of γ-FeOOH was shown to reduce significantly the half-life of Mn(II) in 0.7 M NaCl from hundreds of hours to hours. The numerical values of the surface rate constants for the γ-FeOOH and that reported for colloidal MnO2 are comparable in order of magnitude.
Additional Information
© 1982 Published by Elsevier. Received 16 February 1981, Accepted 5 August 1981. Technical assistance from J. H. Earnest of JPL for the BET N₂ surface area measurements 1s gratefully acknowledged.Additional details
- Eprint ID
- 106981
- DOI
- 10.1016/0016-7037(81)90091-0
- Resolver ID
- CaltechAUTHORS:20201209-122140114
- Created
-
2020-12-09Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field