Product Details

Sodium persulfate (Na2S2O8) is a proven oxidant for in-situ chemical oxidation (ISCO) that can treat a wide range of contaminants including chlorinated solvents, petroleum-based chemicals and PAHs.  It is ideal for quick, source zone and hot spot treatment.

Chemistry

Sodium persulfate can produce powerful oxidative (SO4•, SO4•, OH•) and reductive (O2-•) radicals capable of degrading recalcitrant compounds, including chlorinated ethenes (TCE, PCE, DCE and vinyl chloride), chlorinated ethanes (TCA and DCA), chlorinated methanes (carbon tetrachloride and methylene chloride), BTEX, MTBE, polyaromatic hydrocarbons (PAHs), Freons, PCBs, di/tri-chlorobenzenes, petroleum hydrocarbons (TPHs, GRO, DRO), 1,4-dioxane and pesticides.

S2O82- + initiator => SO4•, SO4•, OH• , O2-•

This reaction can be initiated by several methods, such as

  • Alkaline
  • Transition Metals
  • Chelated Metal Catalyst (e.g EDTA)
  • Ferrate
  • FeS
  • Peroxides, and
  • Heat.

These methods can be customized to the site conditions.  Sodium persulfate is typically applied as a solution and is soluble up to 40% wt%.  Typically, the active lifetime in the subsurface is days to weeks.  When used as recommended, it is safe the handle and does not generate heat or gas.

Application Methods

Sodium persulfate can be injected by direct push (DPT), into fixed, injection wells and soil blending.  Because one of the end products of this chemistry is sulfuric acid (H2SO4), it is important that all equipment that is in contact with the solution is compatible with strong acid.

Packaging

55 lbs Bags and 2,204 lbs Bulk Sacks

Pros/Cons

Pros

  • Wide variety of COCs treated
  • Highly soluble

Cons

  • Strong acid product
  • Requires activation