Reduction of pertechnetate by ferrous iron in solution: influence of sorbed and precipitated Fe(II)

Article Abstract:

Surface-mediated reduction by Fe(II)-bearing solids is the most probable pathway for reducing pertechnetate in water-carrying fractures. This was gleaned from an investigation of the reduction of TcO4- to TcO2*nH2O by Fe(II) in slightly acid to basic solution in an all-glass reaction vessel with a hydrophobic inner surface. Although thermodynamically feasible, the one-electron reduction process was found to proceed very slowly, if at all, and is highly improbable.

Analysis, Oxidation-reduction reaction, Oxidation-reduction reactions, Iron, Iron (Metal), Precipitation (Chemistry)

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Spectroscopic evidence for the rate-limited accumulation of a persistent fraction of 1,2-dichloromethane sorbed onto clay minerals

Article Abstract:

The sorption and desorption of 1,2-dichloromethane on montmorillonite and kaolinite was analyzed using diffuse reflectance infrared spectroscopy. The results showed that the sorptive becomes associated to the clay minerals in both a liquid and a labile vapor state. The presence of additional sorbed species which accumulated at a different rate was also detected. These features persisted in the spectra for a substantial period after desorption was initially begun.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Methylene Chloride, Clay minerals

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Role of microstructural properties in the time-dependent sorption/desorption behavior of 1,2-dichloroethane on humic acid

Article Abstract:

The sorptive behavior of 1,2-dichloroethane on humic substances

1st-5th century AD, 1,001 Home Ideas (Periodical)

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