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Soil Oxidant Demand

In-situ chemical oxidation (ISCO) using permanganate is an established remediation technology for the treatment of chlorinated solvents such as tetrachloroethene (PCE) and trichloroethene (TCE). The soil oxidant demand, also known as natural oxidant demand, has been determined by USEPA to be the most important criteria in the overall success of an ISCO remedy.

Soil Oxidant Demand testing, or SOD, can be used to estimate the amount of oxidant consumed during permanganate-based in-situ chemical oxidation applications. Oxidation Systems has developed a simple to use field test to determine the amount of potassium permanganate consumed by reactions with the soil matrix over time. This test provides an evaluation of the feasiblity of using ISCO to remediate soil and groundwater. The SOD of site groundwater and soil is a critical parameter in the design and selection of an ISCO remedy because it is the basis for determining the amount (and hence cost) of permanganate that will be required to satisfy the oxidant demand of an aquifer. Our SOD test kit offers significant cost savings and time advantages over conventional laboratory based oxidant demand tests. Oxidation Systems also offers laboratory based SOD testing to supplement the results provided by these test kits.


SOD testing results are reported in units of g/kg (grams of permanganate consumed per kilogram of soil). These results can be used alone or in combination with additional site characterization data to estimate the quantity of potassium permanganate required to remediate a given contaminated aquifer. This simple and inexpensive SOD test is a good tool that can provide a “go / no-go” decision and accurate cost estimates to aid remediation designers and stake-holders who are considering ISCO for a particular site.

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Our newsletter includes information about Soil Oxidant Demand testing, best practices for sample collection, and incorporating SOD testing in remedial investigations. Keep an eye out for an announcement about our new persulfate test kits.

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