Sodium Persulfate Injection
Activated sodium persulfate has been a commonly used injectate for the last few years and we have injected a large volume of this material in solution and in a slurry. While we have used it primarily for petroleum impacted (BTEX,TPH) sites, numerous other CoC’s can be destroyed by this solution, including the following:
* chlorinated ethenes (TCE, PCE, DCE and vinyl chloride)
* chlorinated ethanes (TCA and DCA)
* chlorinated methanes (carbon tetrachloride and methylene chloride)
* MTBE
* Polyaromatic hydrocarbons (PAHs)
* petroleum hydrocarbons (TPHs, GRO, DRO)
* 1,4-dioxane and pesticides
Activated persulfate generates the sulfate radical (SO4·-), one of the strongest oxidizing species available. However, selection of the “right” activation methods depends on many factors, including: the target contaminants, lithology, hydrogeology, and other specific site conditions. We have conducted numerous bench scale tests using various oxidizer/catalysts concentrations and catalyst compounds on site specific media from many petroleum impacted sites. In addition, we have combined these materials with calcium peroxide (ORC) in bench scale tests, pilot tests and full scale events. This combination appears to mitigate rebound under certain conditions.

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