Extended Release Low Solubility Potassium Persulfate Laboratory and Field Applications
Laboratory tests were conducted in a series of batch and column studies. Batch tests included comparing solubility under different conditions, and evaluating characteristics of several activation methods. Column studies were conducted evaluating the treatment efficacy of common aqueous phase contaminants such as MTBE and 1,4-dioxane, and potential longevity under difference treatment conditions.
Field application included hydraulic placement of activated Klozur KP at 3 locations to address dissolved petroleum constituents and chlorinated volatile organic compounds at a former drum storage area. The targeted vertical profile was between approximately 7 to 11 m below ground surface, where a relatively large contaminant mass was concentrated in a relatively small aquifer volume. Injected solutions included a total of 1,350 kg of Klozur KP and 200 kg of ferrous lactate. Post injection monitoring for 1 year indicated successful distribution of activated Klozur KP and resulted in reductions of up to 99% contaminant concentrations.
The laboratory and field data show that persulfate derived from potassium persulfate is capable of treating a multitude of contaminants of concern and that potassium persulfate exhibits key characteristics that can be used by design engineers and implementers for a variety of site specific applications.