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PersulfOx®

Just Add Water: Powerful Sodium Persulfate Chemical Oxidation with Built-In Activation

Benefits:

  • Promotes rapid and sustained in situ oxidation of a wide-range of organic contaminants
  • Contains a built-in catalyst that remains active through the entire lifespan of the persulfate oxidation reaction
  • Eliminates the need for the co-application of hazardous activation products such as hydrogen peroxide, caustic soda, heat or chelated iron. This means that;
      • The cost of activation products is avoided
      • Injection volume is reduced, making application easier and shortening the on-site programme
      • Site work is safer – just add water, mix and inject
  • Compatible with combined remedy approaches including enhanced biodegradation

How it works

PersulfOx is an advanced in situ chemical oxidation (ISCO) reagent that destroys organic contaminants found in groundwater and soil through abiotic chemical oxidation reactions. It is an all-in-one product with a built-in catalyst which activates the sodium persulfate component and generates contaminant-destroying free radicals without the costly and potentially hazardous addition of a separate activator. The (patented) catalyst enhances the oxidative destruction of both petroleum hydrocarbons and chlorinated contaminants in the subsurface.

Typically, sodium persulfate is activated with the addition of heat, chelated metals, hydrogen peroxide or base, in order to generate sulfate radicals. These activation processes are inherently complex, costly and can pose additional health and safety risks. In comparison, PersulfOx is a relatively safe and easy-to-use ISCO agent.

PersulfOx utilises a unique silica-based, microscopic surface on which oxidants and contaminants can come together and react in a distinct and efficient process known as “surface mediated oxidation.” During this process, oxidation reactions occur repeatedly on the surface of the catalyst serving several contaminant-reducing functions:

  • The generation of sulfate radical and other oxidising species
  • Accelerated oxidation through the adsorption of contaminant molecules and other oxidising species
  • Catalyses direct and free-radical-mediated oxidation by sodium persulfate

persulfox-oxidation PersulfOx<sup>®</sup>

PersulfOx Intellectual Property

With the purchase and proper use of PersulfOx Catalysed Persulfate, Regenesis’ customers gain the benefits of the latest advancements in persulfate technology for environmental remediation. Furthermore, through an arrangement between Regenesis and FMC Corporation, PersulfOx customers are free to use PersulfOx without any risk of patent infringement claims from FMC Corporation.

PersulfOx SP

For use on Projects Specifying the use of Sodium Persulfate and a Separate Chemical Activator such as Alkaline Activation, Hydrogen Peroxide Activation, or Iron Activation

PersulfOx SP was formulated for use on projects specifying the use of persulfate and a separate chemical activation process such as alkaline activation, hydrogen peroxide activation, or iron activation. It can also be used as a follow-on treatment to Regenesis’ PersulfOx Catalysed Persulfate technology.

When mixed with water, PersulfOx SP forms a solution that can be mixed with soil or injected into subsurface groundwater along with a chemical activation technology (i.e. NaOH, hydrogen peroxide, chelated iron, etc.). Upon activation the product produces a suite of powerful oxidising radicals which destroy a broad range of pollutants. Once the activating chemical is consumed, a level of radical formation is sustained as a result of the PersulfOx catalyst’s persistence.

Traditional methods of activation are known to be short-lived, requiring multiple reapplications of costly chemical activator. By replacing sodium persulfate with PersulfOx SP, the environmental professional gains all the benefits of traditional activation technologies, PLUS the assurance that after the chemical activator is consumed, the catalyst remains behind. The remaining catalyst continues the formation of the desired pollutant-destroying oxidation reactions.

In the event that a remediation program involving PersulfOx Catalysed Persulfate requires multiple injections of oxidant, the practitioner may determine that a full measure of catalyst is not required in which case follow-on applications of PersulfOx SP may be appropriate.

1US and international patents apply. License to practice technology granted by REGENESIS.
2US and international patents apply. License to practice technologies granted by REGENESIS under agreement with FMC Corporation

Target Contaminants:

Petroleum Hydrocarbons

  • Benzene, Toluene, Ethylbenzene and Zylene (BTEX)
  • Gasoline Range Organics (GRO) (C6-C10-12)
  • Diesel Range Organics (DRO) (C8-12-C24-26)
  • Oil Range Organics (ORO) (C22-32)
  • Creosote (coal tar)
  • Methyl-Tertiary Butyl Ether (MTBE)
  • Tert-Butyl Alcohol (TBA)
  • cis-1,2 Dichloroethene (DCE)
  • Vinyl chloride (VC)

Chlorinated Compounds

  • Chlorinated Solvents
  • Tetrachloroethylene (PCE)
  • Trichloroethene (TCE)
  • cis-1,2 Dichloroethene (DCE)
  • Vinyl chloride (VC)
  • Tetrachloroethane
  • Trichloroethane (TCA)
  • Dichloroethane (DCA)
  • Carbon tetrachloride
  • Chloroethane

Ethers

  • 1,4-Dioxane

For a complete listing of treatable contaminants please visit our Range of Treatable Contaminants Page.

Typical Soil and Groundwater Remediation Application Methods:

  • Permanent injection wells
  • Direct-push injection (barriers and grids)
  • Gravity feed
  • Excavation applications into soil or on top of bedrock
  • Soil mixing

Next Steps:

If you currently have a project and need a remediation solution now, visit our Quick Start Solution page.
Have questions or want to explore some ideas? Contact Us to get in touch with a local representative.