PlumeStop® Liquid Activated Carbon™

Proven, Fast & Cost-Effective

  • Captures and biodegrades a wide range of contaminants
  • Distributes widely under low injection pressures
  • Biodegrades contaminants in-place
  • Stops contaminant migration and protects sensitive receptors
  • Addresses back-diffusion

PlumeStop Resources

Case Studies

Technical Bulletins

PFAS Treatment

Video Library

Range of Treatable Contaminants

Typical Applications

– Liquid-based direct-push injection through hollow rods

– Liquid-based direct-placement into boreholes

– Liquid-based injections in conjunction with Oxygen Release Compound (ORC) to support enhanced aerobic biodegradation

– Liquid-based injections in conjunction with Hydrogen Release Compound (HRC) to support enhanced anaerobic biodegradation

plumestop-s barrels with van

The Four PlumeStop Treatment Mechanisms

Dispersion, Sorption, Biodegradation and Regeneration


Dispersion within the Subsurface

PlumeStop is a liquid activated carbon™ material which consists of a very fine suspension of charged particles which resists clumping and has a water-like viscosity. As a result, PlumeStop is easily applied into the subsurface through gravity-feed or low-pressure injection.


Rapid Sorption of Dissolved-Phase Contaminants

Upon reagent injection, target contaminants partition out of the aqueous phase and sorb onto the liquid activated carbon™ matrix, thereby removing mobile contaminants from the immediate risk pathway. Concentration of the contaminants in this manner, in a matrix conducive to degrader colonization and activity, results in a direct increase in efficiency of contaminant destruction.


Biodegradation of Contaminants within the Matrix

Once in place and with contaminants partitioned onto its surface, PlumeStop is colonized by contaminant-degrading bacteria.


Regeneration of Sorption Sites for Long-Term Treatment

Enhanced biodegradation of contaminants within the biomatrix regenerates or frees up sorption sites allowing contaminants to further partition out of the groundwater. This allows a single application of PlumeStop to remain functional for an extended/ indefinite period of time.

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FAQs about PlumeStop® Liquid Activated Carbon™

PlumeStop® Liquid Activated Carbon™ is a fast-acting groundwater remediation reagent which captures and biodegrades a range of contaminants. PlumeStop accomplishes treatment with the use of a highly dispersible, fast-acting, sorption-based technology which captures dissolved-phase contaminants within its matrix-like structure. Once contaminants are absorbed onto the regenerative matrix, biodegradation processes achieve complete remediation at an accelerated rate.

PlumeStop® is composed of very fine particles of activated carbon (>1-2µm) suspended in a proprietary colloidal fluid through the use of unique organic polymer dispersion chemistry. Once in the subsurface, the material behaves as a colloidal biomatrix binding to the aquifer matrix, removing contaminants from groundwater, and expediting permanent contaminant biodegradation. PlumeStop works in 4 phases: the first is dispersion within the subsurface, the second is rapid sorption of dissolved-phase contaminants, then biodegradation of contaminants within the matrix, and the final phase is regeneration of absorption sites for long-term treatment.

PlumeStop® is right for your project if you are trying to treat organic groundwater contaminants including hydrocarbons, halogenated compounds, a wide variety of volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). PlumeStop is also effective in treating a range of PFAS contaminants (PFOA/PFOS). PlumeStop can be applied to inhibit the spreading of contaminant plumes, to protect sensitive receptors, or to prevent contaminant migration across property boundaries.