New—Permanganate Soil Oxidant Demand Program Permanganate (MnO4) is an established technology for the in situ chemical oxidation of the chlorinated ethenes PCE, TCE, DCE and vinyl chloride. However, permanganate can also react with natural organic matter and other components of soil. The amount of permanganate consumed by the soil is known as the soil oxidant demand (SOD) and often controls the amount of permanganate needed to remediate a site. PRIMA Environmental offers two types of permanganate SOD testing: a single time point measurement (SOD-s) and a multiple time point measurement (SOD-m). SOD-s combines soil, groundwater and five different doses of permanganate. After 48 hours, the residual permanganate is measured. SOD is defined as the mass of permanganate consumed per mass of soil, usually report ed in grams potassium permanganate per kilogram soil. Five initial concentrations of permanganate are used because SOD often depends upon the initial concentration. In SOD-m, three series of replicates containing soil, groundwater and permanganate are prepared. Each series contains a different initial concentration of permanganate. Periodically for 10 days, one replicate from each series is sampled for residual permanganate. The mass of permanganate consumed per mass of soil is plotted as a function of time. Copyright © PRIMA Environmental 2003 - 2008