Potassium and Sodium Permanganate

Permanganate is an oxidizing agent with an affinity for oxidizing organic compounds containing carbon-carbon double bonds, aldehyde groups or hydroxyl groups. The permanganate ion is strongly attracted to the electrons in carbon-carbon double bonds, such as those found in chlorinated alkenes. Under normal subsurface pH and temperature conditions, the carbon-carbon double bond of alkenes is broken and the unstable intermediates are converted to carbon dioxide through either hydrolysis or further oxidation by the permanganate ion. Permanganate can also be used to treat organic compounds that contain hydroxyl functional groups such as primary and secondary alcohols, as well as some organic acids such as phenol. These oxidation reactions occur best at higher pH values where hydrogen abstraction creates a negative charge on the oxygen atom.

Manganese dioxide (MnO2) is a natural mineral already found in the soils in many parts of the country. If the precipitation of manganese dioxide in the soils is excessive, it can reduce the permeability of the soil, thus limiting injection of the aqueous oxidant. Bench-scale and Soil Oxidant Demand testing by Oxidation Systems can identify potential problems with in-situ chemical oxidation and allow design modifications to be made before field-scale implementation occurs.


 Permanganate bench
                      scale testing

Bench-scale testing with permanganate


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