Oxidative removal of Mn(II) from solution catalysed by the -FeOOH (lepidocrocite) surface

Details Oxidative removal of Mn(II) from solution catalysed by the -FeOOH (lepidocrocite) surface Oxidative removal of Mn(II) from solution catalysed by the -FeOOH (lepidocrocite) surface

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45.2377s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 45, Issue 12, pp.2377-2383

Computer Science

8

Scientific paper

A laboratory study was undertaken to ascertain the role of surface catalysis in Mn(II) oxidative removal. -FeOOH, a ferric oxyhydroxide formed by O 2 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 -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 -FeOOH and that reported for colloidal MnO 2 are comparable in order of magnitude.

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