In situ chemical oxidation (ISCO)
Chemical Oxidation Solutions
Persulfate and its activator for oxidative destruction of hydrocarbons, fuel oxygenates, chlorinated solvents and 1,4-dioxane in high-concentration source areas.
Terra Systems' chemical oxidation solutions are designed to rapidly destroy contaminants and accelerate site cleanup. Sodium persulfate generates oxidative sulfate and hydroxyl radicals in groundwater; TSI-FSA™, a ferrous sulfide activator, triggers that reaction while improving crew safety and reducing damage to injection tooling compared to traditional activation methods.
Persulfate-based ISCO is effective across petroleum hydrocarbons (BTEX, TPH, PAHs), fuel oxygenates (MTBE, TBA), chlorinated ethenes (PCE, TCE, DCE, vinyl chloride), chlorinated ethanes and methanes, 1,4-dioxane, and pesticides. It is frequently used in a treatment-train approach alongside the SRS® substrate line.
At a glance
Rapid source-area treatment
Oxidative radicals destroy a broad range of organic contaminants quickly, suited to hot spots.
Safer activation
TSI-FSA™ ferrous sulfide activation runs at a lower pH than traditional activators, improving field-crew safety.
01 Products
Products and data sheets.
Each product has its own technical data sheet and safety data sheet. Where a sheet is being revised, request it from our team.
| Product | Description | Available in | Documents |
|---|---|---|---|
| TSI-SPS™Sodium persulfate | Sodium persulfate oxidant for in situ chemical oxidation (ISCO), injected into groundwater to rapidly generate oxidative (sulfate and hydroxyl) radicals that degrade a broad range of organic contaminants. | 55-lb bag | TDSSDS |
| TSI-FSA™Persulfate activator | Ferrous sulfide-based persulfate activator for in situ chemical oxidation (ISCO). Activates sodium persulfate while improving crew safety, minimizing damage to injection tooling, and reducing project cost. | 330-gallon IBC tote · 275-gallon IBC tote · 55-gallon drum · 5-gallon bucket | TDSSDS |
02 Related resources
Case studies, papers and manuals.
- In-Situ Chemical OxidationPresentation · 2021
- Introduction to Activated Persulfate In-Situ OxidationPresentation · 2021
- Persulfate ActivationPresentation · 2021
- Persulfate SafetyPresentation · 2021
- Optimizing Injection Strategies and In Situ Remediation Performance (PDF)Design manual · 2020 · Interstate Technology & Regulatory Council (ITRC)
03 Contact
Get a recommendation for your site.
Send us the contaminants, the concentrations and the site conditions. Your question is routed to the right chemist or engineer; you do not have to work out who that is first.