PERSULFATE



ISOTEC's persulfate technology uses sodium persulfate, activated by our patented modified Fenton's reagent, alkaline reagents (including sodium hydroxide and lime), hydrogen peroxide or our patented chelated iron complex to produce sulfate free radicals that attack contaminants. Persulfate, when used as an in-situ chemical oxidation reagent, is particularly effective at treating contaminants from aromatics like benzene, toluene, ethylbenzene, xylenes; and, chlorinated solvents such as perchloroethene (PCE) and trichloroethene (TCE). ISOTEC uses both injection and soil mixing methods to deliver reagent for environmental remediation.

The reaction mechanism associated with our persulfate-based process is shown below:

S2O82- + Fe2+ → 2SO4●-

Where:

S2O82- = Persulfate (Sodium, Ammonium or Potassium)
SO4●-  =  Sulfate Radical


COMPARISON OF PERSULFATE ACTIVATION METHODS


Technology Features Base Activation Chelated Iron Activation Heat Activation MFR/Peroxide Activation
Aquifer Basification Yes, pH>10.5 No No No
Sulfate Radical Production Yes Yes Yes Yes
Hydroxyl Radical Production Limited No No Yes
Superoxide Radical Production Limited No No Yes
Controlled Reaction Yes Yes No Yes
Bioremediation Stimulation No No No Yes

 

For our technical brochure, please click here.